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EP0311863A2 - Device for dispersing a fluid - Google Patents

Device for dispersing a fluid Download PDF

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Publication number
EP0311863A2
EP0311863A2 EP88116290A EP88116290A EP0311863A2 EP 0311863 A2 EP0311863 A2 EP 0311863A2 EP 88116290 A EP88116290 A EP 88116290A EP 88116290 A EP88116290 A EP 88116290A EP 0311863 A2 EP0311863 A2 EP 0311863A2
Authority
EP
European Patent Office
Prior art keywords
pump
stop
piston
discharge
stroke
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88116290A
Other languages
German (de)
French (fr)
Other versions
EP0311863B1 (en
EP0311863A3 (en
Inventor
Karl-Heinz Fuchs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aptar Radolfzell GmbH
Original Assignee
Erich Pfeiffer GmbH
Ing Erich Pfeiffer GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Erich Pfeiffer GmbH, Ing Erich Pfeiffer GmbH filed Critical Erich Pfeiffer GmbH
Priority to AT88116290T priority Critical patent/ATE84229T1/en
Publication of EP0311863A2 publication Critical patent/EP0311863A2/en
Publication of EP0311863A3 publication Critical patent/EP0311863A3/en
Application granted granted Critical
Publication of EP0311863B1 publication Critical patent/EP0311863B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons

Definitions

  • the invention relates to a discharge device for flowable media with a base body for receiving a media reservoir and with a thrust piston pump which has a pump piston which is displaceably guided on the piston track of a pump cylinder between an initial position and a pump stroke end position, and one which is delimited by the pump cylinder and the pump piston , Pump chamber connected to a discharge opening of the device via an outlet channel.
  • Such discharge devices are generally used for the metered discharge of the flowable medium in metered volume units, so that they are particularly suitable for pharmaceutical, cosmetic and similar products.
  • the thrust piston pump of the discharge device can be arranged on a storage container, on which it can move into the pump chamber during the respective return stroke in the upright normal position and / or in the reverse head position intake valve closes during the pump stroke.
  • the discharge device can also be designed as a disposable applicator, the stored media supply of which is exhausted after a full pump stroke, so that the pump chamber is not repeatedly filled.
  • Some media require a very precise dosing in individual doses tailored to the user, but it would be very expensive to design the size of the pump chamber to be different in size for the respective application.
  • the invention has for its object to provide a discharge device of the type mentioned, with which a metered amount of the flowable medium can be applied in a simple manner, which is smaller compared to the effective working volume of the metering chamber or compared to the metered amount applied during a full pump stroke.
  • the maximum pump stroke can be subdivided into at least two partial strokes in a discharge device of the type described.
  • a limiting device which at most extends as far as the piston raceway in order to reduce the discharge volume to at least one partial volume.
  • This limitation device can effectively prevent a quantity of media corresponding to the full pump stroke from being applied, the quantity applied also representing a precisely metered quantity or a quantity precisely determined by the limitation means and not merely representing an arbitrary or arbitrary quantity, as is the case It would be the case if the pump piston was not pushed all the way to its pump stroke end position in a conventional push piston pump.
  • the limiting device does not protrude inward beyond the piston raceway or opposite the Envelope surface of the piston raceway is offset axially outwards or with respect to the piston raceway, it cannot lead to impairments of the piston guidance or the tight contact of the pump piston with the piston raceway.
  • a particularly precise metering is achieved if the pump chamber is designed in the form of a metering chamber which determines the discharge volume per pump stroke.
  • the limiting device could e.g. be an opening in the pump cylinder which is to be made with a tool or which already exists and which is closed on the part of the pump stroke corresponding to the partial volume and then opened so that the pressure in the pump chamber drops and therefore no further discharge takes place.
  • a particularly advantageous embodiment results, however, if the limiting device has at least one stop assigned to a counterstop, in particular a stroke stop that limits the pump stroke to at least one partial stroke, this stop or the counterstop expediently reaching at most as far as the piston raceway or essentially outside of the piston stroke Piston raceway, in particular on an outside of the pump cylinder.
  • the limiting device could be designed such that the associated partial volume can no longer be changed once the limiting device has been defined.
  • the limiting device is expediently designed to be detachable in the sense of removing the limitation. This can be achieved in a very simple manner in that the stop is designed as a latch that can be overcome under a predetermined pump actuation force.
  • the limiting device acts due to a noticeable resistance which is higher than the normal pump actuating force and opposes this actuating force and which can be overcome by increasing the actuating force by the user immediately after the preceding partial stroke, so that it is also possible to have two or more Apply partial volumes immediately after each other.
  • the stop or counterstop can be provided on components of the discharge device that are not formed directly by the pump cylinder or the pump piston or are arranged separately from them or at a distance from them.
  • the stop is expediently provided on a component that can be moved relative to the pump cylinder, in particular with the pump piston, wherein preferably the counterstop can be formed by the pump cylinder, so that no separate components are required or even the counterstop can be formed directly by an outside of the pump cylinder without separate shaping.
  • the stop is designed to be resilient, in particular provided on a spring arm approximately parallel to the pump axis, the stop preferably has a run-up slope for the counterstop, so that the stop can be moved resiliently from the stop position by the pressure of the counterstop or the counterstop surface if the actuating force exerted on the thrust piston pump is increased accordingly.
  • the stop could also lie within the pump cylinder, but at a distance from the piston raceway, for example, in such a way that it protrudes beyond the inner end of the pump piston and runs onto a bottom surface of the pump cylinder as a counter-stop, the stop then being able to be moved in relation to the pump piston by the partial strokes .
  • the stop lies outside the pump cylinder and is in particular assigned to an end face of the pump cylinder provided as a counterstop, the stop preferably projecting freely in a particularly cap-shaped actuating handle for the push piston pump, so that it is protected outside of the cylinder despite being arranged lies.
  • the stop extends like a collar around the pump axis and is formed, for example, by at least one inner ring collar, which is preferably subdivided in the circumferential direction, then on the one hand there is very high strength with small dimensions and on the other hand the stop can be used for additional mutual guidance of pump pistons and Pump cylinders are used on at least one partial stroke. In addition, relatively high spring forces of the stop can be achieved through this design.
  • the stop is designed in the manner of a resiliently expandable clamp, which is formed in particular by at least two partially sleeve-shaped spring arms, so that a very precise mutual alignment of the stop and the pump cylinder is possible.
  • the stop is formed by a component which is separate from the pump piston and fastened in a holder, since different components are then used to achieve this cher partial volumes different stops can be attached to one and the same discharge device.
  • the stop can be formed by a sleeve-shaped stop body, which in particular has an end wall and the spring arms projecting therefrom, the stop body preferably being fastened by being blown into a retaining clip encompassing it on the outer circumference.
  • the mutual alignment of the pump cylinder and the pump piston, at least in the area of the respective stop position, can be significantly improved in that a centering guide is provided in front of the stop surface of the stop, which is preferably formed by at least one conical inner surface of the stop body on which the pump cylinder is expedient runs with a peripheral edge that is sharp angled in cross section.
  • the media store is expediently formed directly by the pump cylinder, which in this case is cup-shaped and can be closed at the bottom by a bottom wall formed in one piece with its jacket.
  • This pump cylinder is advantageously designed as a separate vessel from the rest of the discharge device, which is closed at its open end with a suitable closure, for example with a zipper designed in the manner of a crimp closure. After opening this cap, the container filled with medium can be placed on the pump piston. The medium to be discharged is thus transported in a vessel forming the pump chamber, stored and kept ready for consumption and then discharged with the discharge device directly out of this vessel via the outlet channel through the discharge opening.
  • the training can be done in this way hen be that the vessel after pumping empty is withdrawn from the pump piston and replaced by a new, still filled vessel.
  • the base body is formed by the actuating handle, which preferably receives the stop in a discharge nozzle projecting over an end wall, a piston shaft forming the pump piston lying within the handle and on the inside of the end wall carrying the discharge nozzle, so that in addition only three separate components for the discharge device are required for the vessel. If the stop is formed in one piece with the base body, only two such components are required.
  • the example in the manner of a freewheel which releases the respective continuation of the pump stroke, but which prevents pull-back movements, can be formed in a very simple manner directly by the stop, which is preferably an annular shoulder of the Pump cylinder engages like a barb when the pump piston has been moved in the direction of the pump stroke while overcoming the stop detent beyond the associated stop position.
  • the design according to the invention is particularly suitable for discharge devices in which the discharge opening is designed as a spray nozzle.
  • the discharge opening is designed as a spray nozzle.
  • two limited partial volumes or two stroke-limited partial strokes can be provided, each partial volume being intended for use in one of the two nostrils of the user and only the first stop position being designed to be overcome.
  • the discharge device shown in FIGS. 1 to 3 is designed for the discharge of relatively small amounts of media in the order of less than one ml and can, for example, have a length in the order of only about 5 cm.
  • the discharge device 1 consists exclusively of plastic parts, which are expediently produced by injection molding and are only connected to one another by plugging them together.
  • the discharge device 1 has a base body 2 designed in the manner of a housing, which carries a media reservoir 3 which can be moved relative to it and a thrust piston pump 4.
  • the thrust piston pump 4 has a pump cylinder 5 which is formed directly by the media reservoir 3 and which lies essentially within the base body 2 and is formed by a vessel which is cylindrical over most of its length.
  • the base body 2 carries a pump piston 6 rigidly connected to it, to which the inner surface of the pump cylinder 5 is assigned as piston raceway 7.
  • a pump chamber 8, which is at the same time the storage space of the media store 3, is delimited at one end by the pump piston 6 in the pump cylinder 5.
  • An outlet channel 9 extends from the inner end face of the pump piston 6, the valve-free is guided up to a discharge opening 10 leading into the open, which is formed by an atomizing nozzle.
  • the pump piston 6 can be moved relative to the pump cylinder 5 only by means of a single full pump stroke 11, through which the pump cylinder 5 or the media store 3 is essentially completely emptied and which by means of a limiting device to be described, in two partial strokes 12 of approximately the same length, 13 is divided.
  • the base body 2 forms an actuation handle 14, which is essentially formed by the outer end face of an oval end wall 15.
  • a discharge nozzle 16 which is in the axis of the thrust piston pump 4 and which is formed in one piece with the base body 2 and has the discharge opening 10 in its end face, projects beyond the outside thereof.
  • a cap jacket 17 which is oval in view of the end wall 15 and has an axial extent of the order of that of the discharge port 16, preferably slightly larger in comparison to the discharge port 16.
  • the pump cylinder 5 or the media store 3 projects with part of its length beyond the open end of the cap jacket 17, while after the pump stroke 11 or the first partial stroke 12 has been carried out, it extends completely within the Cap jacket 17 lies.
  • the cap jacket 17 is provided with two opposing finger openings 18, which are designed so that they can hold the thumb of the hand of a user who puts the index finger and the middle finger of this hand on both sides of the discharge nozzle 16 on the outside of the end wall 15 or on the actuating handle 14 formed by this.
  • the pump cylinder 5 is displaced with respect to the pump piston 6 or the base body 2 and medium is displaced from the pump chamber 8 through the discharge channel 9 and sprayed out through the discharge opening 10.
  • the substantially hollow or tubular discharge nozzle 16 has a piston sleeve 19 formed in one piece with it and lying within it at a radial distance, which projects beyond the end wall 15 both outwardly and inwardly into the cap jacket 17 and which the piston inserted into it 6 wears.
  • the rear end of the piston 6 is extended to a piston shaft 20 which is formed in one piece with it and has approximately the same outer cross-sections, which only protrudes by the length of the discharge nozzle relative to the end face of the discharge nozzle 16 and with its associated end surface on an inner shoulder of the discharge nozzle 16 bears in such a way that a swirl device for the medium is formed between this end face and the discharge nozzle 16.
  • the outlet channel is formed by a central longitudinal bore which passes directly behind the end of the piston sleeve 19 at the pump piston 6 via a transverse bore into a main section of the outlet channel 9, which extends between the outer circumference of the piston skirt 20 and the inner circumference of the piston sleeve 19 is limited and can be formed, for example, by at least one longitudinal groove on the outer circumference of the piston skirt 20.
  • the pumping piston 6 has at least one, in particular two, ring-shaped piston lips 21, one behind the other, which are formed in one piece with it, the front of which is provided directly after the front end face of the pumping piston 6, while the rear, small distance from the associated end of the piston sleeve 19 Has.
  • the pump cylinder 5 or the media reservoir 3 is closed at its end opposite the pump piston 6 with a cylinder base 22 which is formed in one piece with the rest of the pump cylinder 5 and is curved inward in the manner of a spherical cap such that it has a thumb cavity on the outside for engaging the Thumb tip of the user's hand and on the inside forms a correspondingly curved elevation.
  • the front end surface of the pump piston 6 is provided with a recess which is adapted to this elevation and has the same shape, the bottom surface of which strikes the cylinder base 22 at the end of the full pump stroke 11, so that virtually no residual amount of the medium to be discharged remains in the pump cylinder 5.
  • the open end of the pump cylinder 5 facing away from the cylinder base 22 is approximately at the level of the end wall 15.
  • the pump cylinder 5 has a substantially cylindrical annular collar 23 which is formed in one piece with it and projects beyond its other outer circumference and which can serve as a fastening collar for receiving a tear-open closure of the media store 3.
  • the outer diameter of the piston sleeve 19 is at least in its end region engaging in the pump cylinder 5 approximately as large as the inner diameter of the piston raceway 7 or the outer diameter of the piston lips 21 or, on the other hand, only slightly smaller, this freely projecting end of the piston sleeve 19 practically in every functional position Thrust piston pump 4 engages in the pump cylinder 5.
  • the pump cylinder 5 can be guided very securely even with a relatively thin-walled design with a wall thickness of the order of magnitude of, for example, only one millimeter and at the same time stiffened by the piston rod formed by the piston sleeve 19 and the piston skirt 20.
  • a limiting device 24 is provided, for which, in addition to the previously mentioned components of the discharge device 1, only a single additional component is required, so that by omitting this Component same discharge device can also be used for an undivided pump stroke.
  • This component has a number of stops one behind the other in the stroke direction, which can be smaller than or equal to the number of partial strokes by one stop, so that such a stop 25 is provided at least for all partial strokes before the last partial stroke.
  • the stop 25 or the stops lying one behind the other is assigned a counter stop 26 formed directly by the pump cylinder 5, the stop 25 having two stop surfaces 27, which are opposite one another on both sides of the pump axis 30 and are designed in the manner of inner shoulders and are curved around the pump axis 30, which as Counter abutment surface 28 is associated with the open end or end surface of the pump cylinder 5 or the annular collar 23, specifically in its radially outer region.
  • the stop surface 27 and / or the counter stop surface 28 has one Raised bevel 29 extending at least over part of its width, it also being possible for the entire stop surface 27 to be designed as a bevel.
  • the stop 25 is formed by a circumferentially divided, radially inwardly projecting ring collar 31, the ring sections of which are each provided on a spring arm 32 which projects freely approximately parallel to the pump axis 30 in the direction of the pump stroke of the pump piston 6 or is formed in one piece therewith.
  • two sections of the annular collar 31 or spring arms 32 lying opposite one another in the direction of the longer extension of the end wall 15 are provided, which according to FIG. Fig. 3 formed ring segment-shaped and the ends of which are slightly set back relative to the flat, curved longitudinal sides of the cap jacket 17 and are thus contact-free with respect to the base body 2.
  • the spring arms 32 are also each curved over an arc angle of approximately 90 ° about the pump axis 30, so that they form shell-shaped and also relatively hard resilient spring elements with a relatively small wall thickness.
  • the stop 25 or the spring arms 32 form part of a one-piece, sleeve-shaped stop body 33 which, at its end remote from the free ends of the spring arms 32, has an annular disk-shaped end wall 34 which is at a distance from the stop 25 and which is in the region of the connection of the discharge nozzle 16 rests with its outside against an annular shoulder of the base body 2 formed by the inside of the end wall 15.
  • the stop body 33 is fastened by being blasted into a holding clamp 35, which is formed in one piece with the base body 2 and is preferably formed by two ring segment-shaped clamp jaws 39, which extend from the inside of the end wall 15 stand out.
  • clamp jaws 39 which grip the stop body 33 only in the area of the spring arms 32 and also only over a small part of its length on the outside, each have an annular groove or the like on their inner sides for the engagement of a latching bead 38, which is approximately in the Level of the inside of the end wall 34 is provided on the outer circumference of the stop body 33 and is used for resilient, axially secured insertion of the stop body 33 into the retaining clip 35.
  • the stop 25 lies at a distance from the free ends of the spring arms 32 or, in the case of two partial strokes 12, 13 provided, approximately in the middle of their length.
  • the spring arms 32 form centering guides 36 for the pump cylinder 5 on their mutually facing inner surfaces, these centering guides 36 being practically formed by an inner cone tapering at an acute angle to the stop surface 27 the outer peripheral edge 37 of the open end of the pump cylinder 5 or the collar 23 is assigned as the counter surface.
  • the pump cylinder 5 is still completely outside the stop body 33 or the centering guide 36.
  • the open end of the pump cylinder 5 plunges into the centering guide 36, so that the pump cylinder 5 except over the pump piston 6 is also guided and centered directly with respect to the stop body 33 or with respect to the base body 2.
  • the counter abutment surface 28 abuts the abutment surface 27, as a result of which considerable or at least significant resistance is opposed to the further actuation of the discharge device 1.
  • the spring arms 32 are pressed outwards as a result of the run-up slope 29 until they slide with the inner peripheral surfaces of the annular collars 31 adjoining the run-up coulters 29 on the outer circumference of the pump cylinder 5 or the annular collar 23.
  • the second partial stroke 13 begins.
  • the counter-stop surface 28 can strike another stop surface 27 'of the stop body 33, this stop surface 27' being expediently formed by the inside of the end wall 34 and so arranged that at the same time the front end surface of the pump piston 6 strikes the cylinder base 22.
  • the end wall 34 is penetrated by the piston sleeve 19 or the piston rod, so that it can help stabilize its position.
  • a pull-off protection 40 is provided.
  • this has at least one locking shoulder 41 which is essentially fixed in the lifting direction with respect to the base body 2 and to which a counter shoulder 42 is assigned on the pump cylinder 5 such that this counter shoulder 42 is engaged by the locking shoulder 41 in the locked position.
  • the resiliently expandable locking shoulder 41 in the manner of locking pliers can be formed in a simple manner by the shoulder surface of the annular collar 31 which faces away from the stop surface 27 or the stop surface 27 'and which is at a distance from the stop surface 27', which is essentially the same as is the axial extent of the collar 23 of the pump cylinder 5.
  • this handle 14a in the embodiment according to FIGS. 4 and 5 is formed by two cupped or in view according to. Fig. 4 concave hollowed finger depressions formed, which rise from the narrow ends of the end wall in each case over an arc angle of about 90 ° to the discharge nozzle 16a. As a result, the discharge device 1a lies very securely in the hand.

Landscapes

  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Reciprocating Pumps (AREA)
  • Lubricants (AREA)
  • Coating Apparatus (AREA)

Abstract

In a dispersing device (1), in particular for single use, the entire pump stroke (11), which is to be carried out only once, is divided into at least two substrokes (12, 13) by a limiting device (24) which has for the end of each substroke a stop (25) which can be overcome in the manner of a resilient catch. All the parts of the limiting device (24) are located in such a way that the guiding of the pump piston (6) of the thrust piston pump (4) on the piston path (7) is in no way impaired. At the end of the last substroke (13), the pump cylinder (5) which can be mounted on the pump piston (6) as a separate vessel is blocked in a positively engaging manner with respect to the other dispersing device (1) using a pull-off securing element (40) so that the inside of the pump cylinder (5) is no longer accessible. <IMAGE>

Description

Die Erfindung betrifft eine Austragvorrichtung für fließfä­hige Medien mit einem Grundkörper für die Aufnahme eines Medien-Speichers und mit einer Schubkolbenpumpe, die einen an der Kolbenlaufbahn eines Pumpenzylinders zwischen einer Ausgangslage und einer Pumphub-Endlage verschiebbar geführ­ten Pumpkolben sowie eine durch den Pumpenzylinder und den Pumpkolben begrenzte, mit einer Austragöffnung der Vorrich­tung über einen Auslaßkanal verbundene Pumpenkammer.The invention relates to a discharge device for flowable media with a base body for receiving a media reservoir and with a thrust piston pump which has a pump piston which is displaceably guided on the piston track of a pump cylinder between an initial position and a pump stroke end position, and one which is delimited by the pump cylinder and the pump piston , Pump chamber connected to a discharge opening of the device via an outlet channel.

Derartige Austragvorrichtungen dienen in der Regel zum dosierten Austrag des fließfähigen Mediums in Dosier-Volu­meneinheiten, so daß sie insbesondere für pharmazeutische, kosmetische und ähnliche Produkte geeignet sind. Die Schub­kolbenpumpe der Austragvorrichtung kann dabei an einem Speicherbehälter angeordnet sein, auf welchen sie beim jeweiligen Rückhub in der aufrechten Normallage und/oder in der umgekehrten Kopflage in die Pumpenkammer ggf. über ein beim Pumphub schließendes Einlaßventil ansaugt. Die Aus­tragvorrichtung kann aber auch als Einweg-Applikator ausge­bildet sein, dessen gespeicherter Medienvorrat nach einem vollen Pumphub erschöpft ist, so daß eine wiederholte Füllung der Pumpenkammer nicht erfolgt.Such discharge devices are generally used for the metered discharge of the flowable medium in metered volume units, so that they are particularly suitable for pharmaceutical, cosmetic and similar products. The thrust piston pump of the discharge device can be arranged on a storage container, on which it can move into the pump chamber during the respective return stroke in the upright normal position and / or in the reverse head position intake valve closes during the pump stroke. The discharge device can also be designed as a disposable applicator, the stored media supply of which is exhausted after a full pump stroke, so that the pump chamber is not repeatedly filled.

Manche Medien bedürfen einer recht genauen Dosierung in auf den Benutzer zugeschnittenen Einzeldosen, jedoch wäre es sehr aufwendig, die Größe der Pumpenkammer für den jeweili­gen Anwendungsfall unterschiedlich groß auszubilden.Some media require a very precise dosing in individual doses tailored to the user, but it would be very expensive to design the size of the pump chamber to be different in size for the respective application.

Der Erfindung liegt die Aufgabe zugrunde, eine Austragvor­richtung der genannten Art zu schaffen, mit welcher auf einfache Weise eine dosierte Menge des fließfähigen Mediums ausgebracht werden kann, die gegenüber dem wirksamen Ar­beitsvolumen der Dosierkammer bzw. gegenüber der bei einem vollen Pumphub ausgebrachten Dosiermenge kleiner ist.The invention has for its object to provide a discharge device of the type mentioned, with which a metered amount of the flowable medium can be applied in a simple manner, which is smaller compared to the effective working volume of the metering chamber or compared to the metered amount applied during a full pump stroke.

Zur Lösung dieser Aufgabe ist bei einer Austragvorrichtung der beschriebenen Art erfindungsgemäß der maximale Pumphub in mindestens zwei Teilhübe unterteilbar. Zweckmäßig ist dafür eine höchstens bis an die Kolbenlaufbahn reichende Begrenzungseinrichtung zur Verringerung des Austragvolumens auf mindestens ein Teilvolumen vorgesehen. Durch diese Begrenzungseinrichtung kann wirksam verhindert werden, daß eine dem vollen Pumphub entsprechende Medienmenge ausge­bracht wird, wobei die ausgebrachte Teilmenge ebenfalls eine genau dosierte bzw. durch die Begrenzungseinrichtung genau bestimmte Menge darstellt und nicht nur lediglich eine beliebige bzw. willkürliche Teilmenge darstellt, wie es der Fall wäre, wenn bei einer üblichen Schubkolbenpumpe der Pumpkolben nicht ganz bis in seine Pumphub-Endlage gedrückt würde. Da die Begrenzungseinrichtung nicht über die Kolbenlaufbahn nach innen vorsteht bzw. gegenüber der Hüllfläche der Kolbenlaufbahn nach außen oder gegenüber der Kolbenlaufbahn axial versetzt ist, kann sie nicht zu Beein­trächtigungen der Kolbenführung bzw. der dichten Anlage des Pumpkolbens an der Kolbenlaufbahn führen. Eine besonders genaue Dosierung wird erreicht, wenn die Pumpenkammer in Form einer das Austragvolumen je Pumphub bestimmenden Dosierkammer ausgebildet ist.To achieve this object, the maximum pump stroke can be subdivided into at least two partial strokes in a discharge device of the type described. For this purpose, it is expedient to provide a limiting device which at most extends as far as the piston raceway in order to reduce the discharge volume to at least one partial volume. This limitation device can effectively prevent a quantity of media corresponding to the full pump stroke from being applied, the quantity applied also representing a precisely metered quantity or a quantity precisely determined by the limitation means and not merely representing an arbitrary or arbitrary quantity, as is the case It would be the case if the pump piston was not pushed all the way to its pump stroke end position in a conventional push piston pump. Since the limiting device does not protrude inward beyond the piston raceway or opposite the Envelope surface of the piston raceway is offset axially outwards or with respect to the piston raceway, it cannot lead to impairments of the piston guidance or the tight contact of the pump piston with the piston raceway. A particularly precise metering is achieved if the pump chamber is designed in the form of a metering chamber which determines the discharge volume per pump stroke.

Die Begrenzungseinrichtung könnte z.B. eine mit einem Werkzeug anzubringende oder bereits vorhandene Öffnung im Pumpenzylinder sein, die auf dem dem Teilvolumen entspre­chenden Teil des Pumphubes geschlossen und dann so geöffnet ist, daß der Druck in der Pumpenkammer abfällt und somit kein weiterer Austrag erfolgt. Eine besonders vorteilhafte Ausführungsform ergibt sich jedoch, wenn die Begrenzungs­einrichtung wenigstens einen einem Gegenanschlag zugeordne­ten Anschlag, insbesondere einen den Pumphub auf mindestens einen Teilhub begrenzenden Hubanschlag aufweist, wobei dieser Anschlag bzw. der Gegenanschlag zweckmäßig höchstens bis an die Kolbenlaufbahn reicht bzw. im wesentlichen außerhalb der Kolbenlaufbahn, insbesondere an einer Außen­seite des Pumpenzylinders liegt.The limiting device could e.g. be an opening in the pump cylinder which is to be made with a tool or which already exists and which is closed on the part of the pump stroke corresponding to the partial volume and then opened so that the pressure in the pump chamber drops and therefore no further discharge takes place. A particularly advantageous embodiment results, however, if the limiting device has at least one stop assigned to a counterstop, in particular a stroke stop that limits the pump stroke to at least one partial stroke, this stop or the counterstop expediently reaching at most as far as the piston raceway or essentially outside of the piston stroke Piston raceway, in particular on an outside of the pump cylinder.

Je nach den Erfordernissen könnte die Begrenzungseinrich­tung so ausgebildet sein, daß das zugehörige Teilvolumen nach einmaliger Festlegung der Begrenzungseinrichtung nicht mehr geändert werden kann. Um jedoch die Möglichkeit zu erhalten, nach dem Austrag eines ersten Teilvolumens minde­stens ein weiteres, gleich oder unterschiedlich großes Teilvolumen auszubringen, ist die Begrenzungseinrichtung zweckmäßig im Sinne der Aufhebung der Begrenzung lösbar ausgebildet. Dies kann in sehr einfacher Weise dadurch erreicht werden, daß der Anschlag als unter vorbestimmter Pump-Betätigungskraft überwindbare Rast ausgebildet ist. Dadurch wirkt die Begrenzungseinrichtung aufgrund eines spürbaren, gegenüber der normalen Pump-Betätigungskraft höheren und dieser Betätigungskraft entgegengerichteten Widerstandes, der durch Erhöhung der Betätigungskraft durch den Benutzer unmittelbar im Anschluß an den vorangehenden Teilhub überwunden werden kann, so daß es auch möglich ist, zwei oder mehr Teilvolumina unmittelbar im Anschluß anein­ander auszubringen.Depending on the requirements, the limiting device could be designed such that the associated partial volume can no longer be changed once the limiting device has been defined. However, in order to obtain the possibility of dispensing at least one additional, identical or different sized partial volume after the discharge of a first partial volume, the limiting device is expediently designed to be detachable in the sense of removing the limitation. This can be achieved in a very simple manner in that the stop is designed as a latch that can be overcome under a predetermined pump actuation force. As a result, the limiting device acts due to a noticeable resistance which is higher than the normal pump actuating force and opposes this actuating force and which can be overcome by increasing the actuating force by the user immediately after the preceding partial stroke, so that it is also possible to have two or more Apply partial volumes immediately after each other.

Der Anschlag bzw. der Gegenanschlag kann an Bauteilen der Austragvorrichtung vorgesehen sein, die nicht unmittelbar durch den Pumpenzylinder oder den Pumpkolben gebildet bzw. gesondert von diesen oder im Abstand zu diesen angeordnet sind. Zur Erzielung kompakter Abmessungen und einer beson­ders präzisen Anschlagfunktion ist der Anschlag zweckmäßig an einem gegenüber dem Pumpenzylinder, insbesondere mit dem Pumpkolben, bewegbaren Bauteil vorgesehen, wobei vorzugs­weise der Gegenanschlag durch den Pumpenzylinder gebildet sein kann, so daß keinerlei gesonderte Bauteile erforder­lich sind oder sogar der Gegenanschlag ohne gesonderte Formgebung unmittelbar durch eine Außenseite des Pumpenzy­linders gebildet sein kann.The stop or counterstop can be provided on components of the discharge device that are not formed directly by the pump cylinder or the pump piston or are arranged separately from them or at a distance from them. In order to achieve compact dimensions and a particularly precise stop function, the stop is expediently provided on a component that can be moved relative to the pump cylinder, in particular with the pump piston, wherein preferably the counterstop can be formed by the pump cylinder, so that no separate components are required or even the counterstop can be formed directly by an outside of the pump cylinder without separate shaping.

Um eine relativ weiche Anschlagbegrenzung am Ende des jeweiligen Teilhubes zu gewährleisten, aber auch ggf. zur einfachen Überwindung der Anschlagrast, ist nach einem weiteren Vorschlag gemäß der Erfindung der Anschlag federnd ausgebildet, insbesondere an einem zur Pumpenachse etwa parallelen Federarm vorgesehen, wobei der Anschlag vorzugs­weise eine Auflaufschräge für den Gegenanschlag aufweist, so daß der Anschlag bei entsprechender Erhöhung der auf die Schubkolbenpumpe ausgeübten Betätigungskraft unmittelbar durch den Druck des Gegenanschlages bzw. der Gegenanschlag­fläche federnd aus der Anschlagstellung bewegt werden kann.In order to ensure a relatively soft stop limitation at the end of the respective partial stroke, but also, if necessary, to easily overcome the stop catch, according to a further proposal according to the invention, the stop is designed to be resilient, in particular provided on a spring arm approximately parallel to the pump axis, the stop preferably has a run-up slope for the counterstop, so that the stop can be moved resiliently from the stop position by the pressure of the counterstop or the counterstop surface if the actuating force exerted on the thrust piston pump is increased accordingly.

Der Anschlag könnte auch innerhalb des Pumpenzylinders, jedoch im Abstand von der Kolbenlaufbahn beispielsweise derart liegen, daß er über das innere Ende des Pumpkolbens vorsteht und an einer Bodenfläche des Pumpenzylinders als Gegenanschlag aufläuft, wobei der Anschlag dann gegenüber dem Pumpkolben rastend um die Teilhübe bewegbar wäre. Besonders vorteilhaft ist es jedoch, wenn der Anschlag außerhalb des Pumpenzylinders liegt und insbesondere einer als Gegenanschlag vorgesehenen Endfläche des Pumpenzylin­ders zugeordnet ist, wobei vorzugsweise der Anschlag frei ausragend in einer insbesondere kappenförmigen Betätigungs­handhabe für die Schubkolbenpumpe liegt, so daß er trotz Anordnung außerhalb des Zylinders geschützt liegt. Erstreckt sich der Anschlag bundartig um die Pumpenachse und ist er beispielsweise durch mindestens einen inneren Ringbund gebildet, der vorzugsweise in Umfangsrichtung unterteilt ist, so ergibt sich einerseits bei kleinen Abmessungen bereits eine sehr hohe Festigkeit und anderer­seits kann der Anschlag zur zusätzlichen gegenseitigen Führung von Pumpkolben und Pumpenzylinder auf wenigstens einem Teilhub herangezogen werden. Außerdem können durch diese Ausbildung relativ hohe Federkräfte des Anschlages erreicht werden.The stop could also lie within the pump cylinder, but at a distance from the piston raceway, for example, in such a way that it protrudes beyond the inner end of the pump piston and runs onto a bottom surface of the pump cylinder as a counter-stop, the stop then being able to be moved in relation to the pump piston by the partial strokes . However, it is particularly advantageous if the stop lies outside the pump cylinder and is in particular assigned to an end face of the pump cylinder provided as a counterstop, the stop preferably projecting freely in a particularly cap-shaped actuating handle for the push piston pump, so that it is protected outside of the cylinder despite being arranged lies. If the stop extends like a collar around the pump axis and is formed, for example, by at least one inner ring collar, which is preferably subdivided in the circumferential direction, then on the one hand there is very high strength with small dimensions and on the other hand the stop can be used for additional mutual guidance of pump pistons and Pump cylinders are used on at least one partial stroke. In addition, relatively high spring forces of the stop can be achieved through this design.

In weiterer Ausgestaltung der Erfindung ist der Anschlag nach Art einer federnd aufspreizbaren Klammer ausgebildet, die insbesondere durch mindestens zwei teilhülsenförmige Federarme gebildet ist, so daß eine sehr präzise gegensei­tige Ausrichtung des Anschlages und des Pumpenzylinders möglich ist.In a further embodiment of the invention, the stop is designed in the manner of a resiliently expandable clamp, which is formed in particular by at least two partially sleeve-shaped spring arms, so that a very precise mutual alignment of the stop and the pump cylinder is possible.

Besonders vorteilhaft ist es, wenn der Anschlag durch einen vom Pumpkolben gesonderten, in einer Halterung befestigten Bauteil gebildet ist, da dann zur Erzielung unterschiedli­ cher Teilvolumina unterschiedliche Anschläge an ein und derselben Austragvorrichtung angebracht werden können. Z.B. kann der Anschlag durch einen muffenförmigen Anschlagkörper gebildet sein, der insbesondere eine Stirnwand und von dieser abstehend die Federarme aufweist, wobei der An­schlagkörper vorzugsweise durch Einsprengen in eine ihn am Außenumfang umgreifende Halteklammer befestigt ist.It is particularly advantageous if the stop is formed by a component which is separate from the pump piston and fastened in a holder, since different components are then used to achieve this cher partial volumes different stops can be attached to one and the same discharge device. For example, the stop can be formed by a sleeve-shaped stop body, which in particular has an end wall and the spring arms projecting therefrom, the stop body preferably being fastened by being blown into a retaining clip encompassing it on the outer circumference.

Die gegenseitige Ausrichtung des Pumpenzylinders und des Pumpkolbens, zumindest im Bereich der jeweiligen Anschlag­stellung, kann wesentlich dadurch verbessert werden, daß vor der Anschlagfläche des Anschlages eine Zentrierführung vorgesehen ist, die vorzugsweise durch mindestens eine konische Innenfläche des Anschlagkörpers gebildet ist, an welcher der Pumpenzylinder zweckmäßig mit einer im Quer­schnitt scharfwinkligen Umfangskante läuft.The mutual alignment of the pump cylinder and the pump piston, at least in the area of the respective stop position, can be significantly improved in that a centering guide is provided in front of the stop surface of the stop, which is preferably formed by at least one conical inner surface of the stop body on which the pump cylinder is expedient runs with a peripheral edge that is sharp angled in cross section.

Im Falle der beschriebenen Ausbildung als Einweg-Applikator ist der Medienspeicher zweckmäßig unmittelbar durch den Pumpenzylinder gebildet, der in diesem Fall napfförmig ausgebildet und am Boden durch eine einteilig mit seinem Mantel ausgebildete Bodenwandung geschlossen sein kann. Vorteilhaft ist dieser Pumpenzylinder als von der übrigen Austragvorrichtung gesondertes Gefäß ausgebildet, das an seinem offenen Ende mit einem geeigneten Verschluß, bei­speilsweise mit einem nach Art eines Krimpverschlusses ausgebildeten Aufreißverschluß, verschlossen ist. Nach Öffnen dieses Verschlusses läßt sich das mit Medium gefüll­te Gefäß auf den Pumpkolben aufstecken. Das auszubringende Medium wird also in einem die Pumpenkammer bildenden Gefäß transportiert, gelagert und für den Verbrauch bereitgehal­ten und dann mit der Austragvorrichtung unmittelbar aus diesem Gefäß heraus über den Auslaßkanal durch die Austrag­öffnung ausgetragen. Die Ausbildung kann dabei so vorgese­ hen sein, daß das Gefäß nach dem Leerpumpen vom Pumpkolben abgezogen und durch ein neues, noch gefülltes Gefäß ersetzt wird.In the case of the described design as a disposable applicator, the media store is expediently formed directly by the pump cylinder, which in this case is cup-shaped and can be closed at the bottom by a bottom wall formed in one piece with its jacket. This pump cylinder is advantageously designed as a separate vessel from the rest of the discharge device, which is closed at its open end with a suitable closure, for example with a zipper designed in the manner of a crimp closure. After opening this cap, the container filled with medium can be placed on the pump piston. The medium to be discharged is thus transported in a vessel forming the pump chamber, stored and kept ready for consumption and then discharged with the discharge device directly out of this vessel via the outlet channel through the discharge opening. The training can be done in this way hen be that the vessel after pumping empty is withdrawn from the pump piston and replaced by a new, still filled vessel.

Zur weiteren Vereinfachung der Ausbildung der erfindungsge­mäßen Austragvorrichtung ist der Grundkörper durch die Betätigungshandhabe gebildet, die vorzugsweise in einem über eine Stirnwand vorstehenden Austragstutzen einen den innerhalb der Handhabe liegenden Pumpkolben bildenden Kolbenschaft und an der Innenseite der den Austragstutzen tragenden Stirnwand den Anschlag aufnimmt, so daß zusätz­lich zum Gefäß nur drei gesonderte Bauteile für die Aus­tragvorrichtung erforderlich sind. Ist der Anschlag eintei­lig mit dem Grundkörper ausgebildet, so sind nur zwei solche Bauteile erforderlich.To further simplify the design of the discharge device according to the invention, the base body is formed by the actuating handle, which preferably receives the stop in a discharge nozzle projecting over an end wall, a piston shaft forming the pump piston lying within the handle and on the inside of the end wall carrying the discharge nozzle, so that in addition only three separate components for the discharge device are required for the vessel. If the stop is formed in one piece with the base body, only two such components are required.

Insbesondere für eine Austragvorrichtung der beschriebenen Art, jedoch auch für eine anders ausgebildete Austragvor­richtung wird vorgeschlagen, eine Rückhub- bzw. Abzieh­sicherung für den Pumpkolben bzw. den Pumpenzylinder derart vorzusehen, daß zumindest nach Durchführung eines bestimm­ten Teilhubes die gegenseitige Rückführung von Pumpkolben und Pumpenzylinder hin zur bzw. in die Ausgangslage ge­sperrt ist und dadurch ein wiederholter voller Pumpenhub nicht durchgeführt werden kann. Dies kann insbesondere dort von Vorteil sein, wo unbedingt vermieden werden soll, daß eine zu große Menge an Medium ausgebracht werden kann oder daß durch Herausziehen des Pumpkolbens aus dem Pumpenzylin­der bzw. aus dem Gefäß darin enthaltene Medienreste zugäng­lich werden. Die beispielswiese nach Art eines Freilaufes die jeweilige Fortführung des Pumphubes zwar freigebende, jedoch gegen Rückhubbewegungen sperrende Abziehsicherung kann in sehr einfacher Weise unmittelbar durch den Anschlag gebildet sein, der vorzugsweise eine Ringschulter des Pumpenzylinders widerhakenartig dann hintergreift, wenn der Pumpkolben in Richtung des Pumphubes unter Überwindung der Anschlagrast über die zugehörige Anschlagstellung hinaus bewegt worden ist.In particular for a discharge device of the type described, but also for a differently designed discharge device, it is proposed to provide a return stroke or pull-off protection for the pump piston or the pump cylinder in such a way that the mutual return of the pump piston and the pump cylinder at least after a certain partial stroke has been carried out or locked into the starting position and a repeated full pump stroke cannot be carried out as a result. This can be particularly advantageous where it is imperative to avoid that too much medium can be dispensed or that media residues contained therein can be accessed by pulling the pump piston out of the pump cylinder or from the vessel. The example in the manner of a freewheel which releases the respective continuation of the pump stroke, but which prevents pull-back movements, can be formed in a very simple manner directly by the stop, which is preferably an annular shoulder of the Pump cylinder engages like a barb when the pump piston has been moved in the direction of the pump stroke while overcoming the stop detent beyond the associated stop position.

Die erfindungsgemäße Ausbildung eignet sich insbesondere für Austragvorrichtungen, bei denen die Austragöffnung als Sprühdüse ausgebildet ist. Z.B. können im Falle eines Nasensprays zwei begrenzte Teilvolumina bzw. zwei anschlag­begrenzte Teilhübe vorgesehen sein, wobei jedes Teilvolumen zur Anwendung in einer der beiden Nasenöffnungen des Be­nutzers bestimmt und nur die erste Anschlagstellung über­windbar ausgebildet ist.The design according to the invention is particularly suitable for discharge devices in which the discharge opening is designed as a spray nozzle. E.g. In the case of a nasal spray, two limited partial volumes or two stroke-limited partial strokes can be provided, each partial volume being intended for use in one of the two nostrils of the user and only the first stop position being designed to be overcome.

Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzel­nen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei einer Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird. Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden näher erläutert. In den Zeichnungen zeigen:

  • Fig. 1 eine erfindungsgemäße Austragvorrichtung in Ansicht und annähernd natürlicher Größe,
  • Fig. 2 die Austragvorrichtung gemäß Fig. 1 im Axialschnitt,
  • Fig. 3 die Austragvorrichtung gemäß Fig. 2 in Ansicht von unten, jedoch bei abgenommenem Pumpenzylinder,
  • Fig. 4 eine weitere Ausführungsform in einer Dar­stellung entsprechend Fig. 1 und
  • Fig. 5 die Austragvorrichtung gemäß Fig. 4 in Draufsicht.
These and further features of preferred developments of the invention are evident from the claims and also from the description and the drawings, the individual features being implemented individually or in groups in the form of sub-combinations in one embodiment of the invention and in other fields, and can represent advantageous and protectable versions for which protection is claimed here. Embodiments of the invention are shown in the drawings and are explained in more detail below. The drawings show:
  • 1 is a discharge device according to the invention in view and approximately natural size,
  • 2 shows the discharge device according to FIG. 1 in axial section,
  • 3 shows the discharge device according to FIG. 2 in a view from below, but with the pump cylinder removed,
  • Fig. 4 shows a further embodiment in a representation corresponding to Fig. 1 and
  • 5 shows the discharge device according to FIG. 4 in a top view.

Die in den Figuren 1 bis 3 dargestellte Austragvorrichtung ist für den Austrag verhältnismäßig kleiner Medienmengen in der Größenordnung unter einem ml ausgebildet und kann beispielsweise eine Länge in der Größenordnung von nur etwa 5 cm haben. Die Austragvorrichtung 1 besteht ausschließlich aus Kunststoffteilen, die zweckmäßig im Spritzgußverfahren hergestellt und lediglich durch Zusammenstecken miteinander verbunden sind.The discharge device shown in FIGS. 1 to 3 is designed for the discharge of relatively small amounts of media in the order of less than one ml and can, for example, have a length in the order of only about 5 cm. The discharge device 1 consists exclusively of plastic parts, which are expediently produced by injection molding and are only connected to one another by plugging them together.

Die Austragvorrichtung 1 weist einen nach Art eines Ge­häuses ausgebildeten Grundkörper 2 auf, der einen gegenüber ihm bewegbaren Medien-Speicher 3 und eine Schubkolbenpumpe 4 trägt. Die Schubkolbenpumpe 4 weist einen unmittelbar durch den Medien-Speicher 3 gebildeten Pumpenzylinder 5 auf, der im wesentlichen innerhalb des Grundkörpers 2 liegt und durch ein über den größten Teil seiner Länge zylindri­sches Gefäß gebildet ist. Der Grundkörper 2 trägt einen mit ihm starr verbundenen Pumpkolben 6, dem als Kolbenlaufbahn 7 die Innenfläche des Pumpenzylinders 5 zugeordnet ist. Durch den Pumpenkolben 6 ist in dem Pumpenzylinder 5 an einem Ende eine Pumpenkammer 8 begrenzt, die gleichzeitig der Speicherraum des Medien-Speichers 3 ist. Von der inne­ren Endfläche des Pumpkolbens 6 geht ein Auslaßkanal 9 aus, der ventilfrei bis zu einer ins Freie führenden Austragöff­nung 10 geführt ist, die durch eine Zerstäuberdüse gebildet ist.The discharge device 1 has a base body 2 designed in the manner of a housing, which carries a media reservoir 3 which can be moved relative to it and a thrust piston pump 4. The thrust piston pump 4 has a pump cylinder 5 which is formed directly by the media reservoir 3 and which lies essentially within the base body 2 and is formed by a vessel which is cylindrical over most of its length. The base body 2 carries a pump piston 6 rigidly connected to it, to which the inner surface of the pump cylinder 5 is assigned as piston raceway 7. A pump chamber 8, which is at the same time the storage space of the media store 3, is delimited at one end by the pump piston 6 in the pump cylinder 5. An outlet channel 9 extends from the inner end face of the pump piston 6, the valve-free is guided up to a discharge opening 10 leading into the open, which is formed by an atomizing nozzle.

Der Pumpkolben 6 ist gegenüber dem Pumpenzylinder 5 nur über einen einzigen vollen Pumphub 11 bewegbar, durch den der Pumpenzylinder 5 bzw. der Medien-Speicher 3 im wesent­lichen vollständig entleert wird und der durch eine noch zu beschreibende Begrenzungseinrichtung in zwei etwa gleich lange Teilhübe 12, 13 unterteilt ist.The pump piston 6 can be moved relative to the pump cylinder 5 only by means of a single full pump stroke 11, through which the pump cylinder 5 or the media store 3 is essentially completely emptied and which by means of a limiting device to be described, in two partial strokes 12 of approximately the same length, 13 is divided.

Zur Durchführung des Pumphubes bildet der Grundkörper 2 eine Betätigungs-Handhabe 14, die im wesentlichen durch die äußere Stirnseite einer ovalen Stirnwand 15 gebildet ist. Vom Zentrum dieser Stirnwand 15 steht über deren Außenseite ein in der Achse der Schubkolbenpumpe 4 liegender Austrag­stutzen 16 vor, der einteilig mit dem Grundkörper 2 ausge­bildet ist und in seiner Endfläche die Austragöffnung 10 aufweist. Vom Rand der Stirnwand 15 steht entgegengesetzt gerichtet zum Austragstutzen 16 ein in Ansicht auf die Stirnwand 15 entsprechend ovaler Kappenmantel 17 ab, dessen Axialerstreckung in der Größenordnung derjenigen des Aus­tragstutzens 16 liegt, vorzugsweise demgegenüber geringfü­gig größer ist.To carry out the pump stroke, the base body 2 forms an actuation handle 14, which is essentially formed by the outer end face of an oval end wall 15. From the center of this end wall 15, a discharge nozzle 16, which is in the axis of the thrust piston pump 4 and which is formed in one piece with the base body 2 and has the discharge opening 10 in its end face, projects beyond the outside thereof. From the edge of the end wall 15 there is a cap jacket 17 which is oval in view of the end wall 15 and has an axial extent of the order of that of the discharge port 16, preferably slightly larger in comparison to the discharge port 16.

In der Ausgangstellung gemäß den Figuren 1 und 2 ragt der Pumpenzylinder 5 bzw. der Medien-Speicher 3 mit einem Teil seiner Länge über das offene Ende des Kappenmantels 17 hinaus, während er nach Durchführung des Pumphubes 11 bzw. des ersten Teilhubes 12 vollständig innerhalb des Kappen­mantels 17 liegt. An den abgeflachten Seiten ist der Kap­penmantel 17 mit zwei einander gegenüberliegenden Fin­geröffnungen 18 versehen, die dafür bestimmt sind, daß sie den Daumen der Hand eines Benutzers aufnehmen können, der den Zeigefinger und den Mittelfinger dieser Hand beider­seits des Austragstutzens 16 an der Außenseite der Stirn­wand 15 bzw. an der durch diese gebildeten Betätigungs-­Handhabe 14 anlegt. Durch Aufeinanderzu-Bewegen des Daumens und der beiden anderen Finger wird der Pumpenzylinder 5 gegenüber dem Pumpkolben 6 bzw. dem Grundkörper 2 verscho­ben und aus der Pumpenkammer 8 Medium durch den Austragka­nal 9 verdrängt sowie durch die Austragöffnung 10 ausge­sprüht.In the starting position according to FIGS. 1 and 2, the pump cylinder 5 or the media store 3 projects with part of its length beyond the open end of the cap jacket 17, while after the pump stroke 11 or the first partial stroke 12 has been carried out, it extends completely within the Cap jacket 17 lies. On the flattened sides, the cap jacket 17 is provided with two opposing finger openings 18, which are designed so that they can hold the thumb of the hand of a user who puts the index finger and the middle finger of this hand on both sides of the discharge nozzle 16 on the outside of the end wall 15 or on the actuating handle 14 formed by this. By moving the thumb and the other two fingers towards one another, the pump cylinder 5 is displaced with respect to the pump piston 6 or the base body 2 and medium is displaced from the pump chamber 8 through the discharge channel 9 and sprayed out through the discharge opening 10.

Der im wesentlichen hohle bzw. rohrförmige Austragstutzen 16 weist eine einteilig mit ihm ausgebildete und innerhalb ihm mit radialem Abstand liegende Kolbenhülse 19 auf, die über die Stirnwand 15 sowohl nach außen wie auch nach innen in den Kappenmantel 17 vorsteht und die den in sie einge­steckten Kolben 6 trägt. Zu diesem Zweck ist das hintere Ende des Kolbens 6 zu einer einteilig mit diesem ausgebil­deten und etwa gleiche Außenquerschnitte aufweisenden Kolbenschaft 20 verlängert, der nur um die Länge der Aus­tragdüse gegenüber der Endfläche des Austragstutzens 16 zurücksteht und mit seiner zugehörigen Endfläche an einer Innenschulter des Austragstutzens 16 derart anliegt, daß zwischen dieser Endfläche und dem Austragstutzen 16 eine Drallvorrichtung für das Medium gebildet ist. Im Bereich des nur geringfügig über die Kolbenhülse 9 vorstehenden Pumpkolbens 6 ist der Auslaßkanal durch eine zentrale Längsbohrung gebildet, die unmittelbar hinter dem beim Pumpkolben 6 liegenden Ende der Kolbenhülse 19 über eine Querbohrung in einen Hauptabschnitt des Auslaßkanals 9 übergeht, der zwischen dem Außenumfang des Kolbenschaftes 20 und dem Innenumfang der Kolbenhülse 19 begrenzt ist und beispielsweise durch mindestens eine Längsnut am Außenum­fang des Kolbenschaftes 20 gebildet sein kann.The substantially hollow or tubular discharge nozzle 16 has a piston sleeve 19 formed in one piece with it and lying within it at a radial distance, which projects beyond the end wall 15 both outwardly and inwardly into the cap jacket 17 and which the piston inserted into it 6 wears. For this purpose, the rear end of the piston 6 is extended to a piston shaft 20 which is formed in one piece with it and has approximately the same outer cross-sections, which only protrudes by the length of the discharge nozzle relative to the end face of the discharge nozzle 16 and with its associated end surface on an inner shoulder of the discharge nozzle 16 bears in such a way that a swirl device for the medium is formed between this end face and the discharge nozzle 16. In the area of the pump piston 6, which protrudes only slightly above the piston sleeve 9, the outlet channel is formed by a central longitudinal bore which passes directly behind the end of the piston sleeve 19 at the pump piston 6 via a transverse bore into a main section of the outlet channel 9, which extends between the outer circumference of the piston skirt 20 and the inner circumference of the piston sleeve 19 is limited and can be formed, for example, by at least one longitudinal groove on the outer circumference of the piston skirt 20.

Der Pumpkolben 6 weist mindestens eine, insbesondere zwei hintereinander liegende, ringförmige und einteilig mit ihm ausgebildete Kolbenlippen 21 auf, von denen die vordere unmittelbar im Anschluß an die vordere Endfläche des Pump­kolbens 6 vorgesehen ist, während die hintere geringen Abstand vom zugehörigen Ende der Kolbenhülse 19 hat. Der Pumpenzylinder 5 bzw. der Medienspeicher 3 ist an seinem dem Pumpkolben 6 gegenüberliegenden Ende mit einem Zylin­derboden 22 geschlossen, der einteilig mit dem übrigen Pumpenzylinder 5 ausgebildet und etwa kugelkalottenförmig derart nach innen gewölbt ist, daß er an seiner Außenseite eine Daumenkuhle für den Eingriff der Daumenkuppe der Hand des Benutzers und an der Innenseite eine entsprechend gekrümmte Erhöhung bildet. Die vordere Endfläche des Pump­kolbens 6 ist mit einer an diese Erhöhung im wesentlichen formgleich angepaßten Vertiefung versehen, deren Boden­fläche am Ende des vollen Pumphubes 11 am Zylinderboden 22 anschlägt, so daß nahezu keinerlei Restmenge des auszutra­genden Mediums im Pumpenzylinder 5 verbleibt. Am Ende dieses Pumphubes befindet sich das vom Zylinderboden 22 abgekehrte, offene Ende des Pumpenzylinders 5 annähernd in Höhe der Stirnwand 15.The pumping piston 6 has at least one, in particular two, ring-shaped piston lips 21, one behind the other, which are formed in one piece with it, the front of which is provided directly after the front end face of the pumping piston 6, while the rear, small distance from the associated end of the piston sleeve 19 Has. The pump cylinder 5 or the media reservoir 3 is closed at its end opposite the pump piston 6 with a cylinder base 22 which is formed in one piece with the rest of the pump cylinder 5 and is curved inward in the manner of a spherical cap such that it has a thumb cavity on the outside for engaging the Thumb tip of the user's hand and on the inside forms a correspondingly curved elevation. The front end surface of the pump piston 6 is provided with a recess which is adapted to this elevation and has the same shape, the bottom surface of which strikes the cylinder base 22 at the end of the full pump stroke 11, so that virtually no residual amount of the medium to be discharged remains in the pump cylinder 5. At the end of this pump stroke, the open end of the pump cylinder 5 facing away from the cylinder base 22 is approximately at the level of the end wall 15.

An diesem Ende weist der Pumpenzylinder 5 eine einteilig mit ihm ausgebildeten und über seinen sonstigen Außenumfang vorstehenden, im wesentlichen zylindrischen Ringbund 23 auf, der als Befestigungsbund für die Aufnahme eines Auf­reiß-Verschlusses des Medien-Speichers 3 dienen kann. Der Außendurchmesser der Kolbenhülse 19 ist wenigstens in deren in den Pumpenzylinder 5 eingreifenden Endbereich annähernd so groß wie der Innendurchmesser der Kolbenlaufbahn 7 bzw. der Außendurchmesser der Kolbenlippen 21 oder demgegenüber nur geringfügig kleiner, wobei dieses frei ausragende Ende der Kolbenhülse 19 praktisch bei jeder Funktionslage der Schubkolbenpumpe 4 in den Pumpenzylinder 5 eingreift. Dadurch kann der Pumpenzylinder 5 auch bei verhältnismäßig dünnwandiger Ausbildung mit einer Wandungsdicke in der Größenordnung von beispielsweise nur einem Millimeter sehr sicher geführt und gleichzeitig durch die von der Kolben­hülse 19 und dem Kolbenschaft 20 gebildete Kolbenstange versteift werden.At this end, the pump cylinder 5 has a substantially cylindrical annular collar 23 which is formed in one piece with it and projects beyond its other outer circumference and which can serve as a fastening collar for receiving a tear-open closure of the media store 3. The outer diameter of the piston sleeve 19 is at least in its end region engaging in the pump cylinder 5 approximately as large as the inner diameter of the piston raceway 7 or the outer diameter of the piston lips 21 or, on the other hand, only slightly smaller, this freely projecting end of the piston sleeve 19 practically in every functional position Thrust piston pump 4 engages in the pump cylinder 5. As a result, the pump cylinder 5 can be guided very securely even with a relatively thin-walled design with a wall thickness of the order of magnitude of, for example, only one millimeter and at the same time stiffened by the piston rod formed by the piston sleeve 19 and the piston skirt 20.

Zur Unterteilung des maximalen Pumphubes 11 in zwei oder mehr aufeinander folgende bzw. aneinander anschließende Teilhübe 12, 13 ist eine Begrenzungseinrichtung 24 vorgese­hen, für die zusätzlich zu den bisher genannten Bauteilen der Austragvorrichtung 1 nur ein einziger zusätzlicher Bauteil erforderlich ist, so daß durch Fortlassen dieses Bauteiles dieselbe Austragvorrichtung auch für einen unge­teilten Pumphub verwendet werden kann.To subdivide the maximum pump stroke 11 into two or more consecutive or adjoining partial strokes 12, 13, a limiting device 24 is provided, for which, in addition to the previously mentioned components of the discharge device 1, only a single additional component is required, so that by omitting this Component same discharge device can also be used for an undivided pump stroke.

Dieser Bauteil weist eine Anzahl von in Hubrichtung hinter­einander liegenden Anschlägen auf, die um einen Anschlag kleiner als oder gleich groß wie die Anzahl der Teilhübe sein kann, so daß zumindest für alle vor dem letzten Teil­hub liegenden Teilhübe ein solcher Anschlag 25 vorgesehen ist. Dem Anschlag 25 bzw. den hintereinander liegenden Anschlägen ist ein unmittelbar durch den Pumpenzylinder 5 gebildeter Gegenanschlag 26 zugeordnet, wobei der Anschlag 25 zwei einander beiderseits der Pumpenachse 30 gegenüber­liegende, nach Art von Innenschultern ausgebildete, um die Pumpenachse 30 gekrümmte Anschlagflächen 27 aufweist, denen als Gegenanschlagfläche 28 die offene End- bzw. Stirnfläche des Pumpenzylinders 5 bzw. des Ringbundes 23, und zwar in deren radial äußeren Bereich, zugeordnet ist. Die Anschlag­fläche 27 und/oder die Gegenanschlagfläche 28 weist eine wenigstens über einen Teil ihrer Breite reichende Auflauf­schräge 29 auf, wobei auch die gesamte Anschlagfläche 27 als Auflaufschräge ausgebildet sein kann.This component has a number of stops one behind the other in the stroke direction, which can be smaller than or equal to the number of partial strokes by one stop, so that such a stop 25 is provided at least for all partial strokes before the last partial stroke. The stop 25 or the stops lying one behind the other is assigned a counter stop 26 formed directly by the pump cylinder 5, the stop 25 having two stop surfaces 27, which are opposite one another on both sides of the pump axis 30 and are designed in the manner of inner shoulders and are curved around the pump axis 30, which as Counter abutment surface 28 is associated with the open end or end surface of the pump cylinder 5 or the annular collar 23, specifically in its radially outer region. The stop surface 27 and / or the counter stop surface 28 has one Raised bevel 29 extending at least over part of its width, it also being possible for the entire stop surface 27 to be designed as a bevel.

Der Anschlag 25 ist durch einen über seinen Umfang geteil­ten, radial nach innen vorstehenden Ringbund 31 gebildet, dessen Ringabschnitte jeweils an einem etwa parallel zur Pumpenachse 30 in Richtung des Pumphubes des Pumpkolbens 6 frei vorstehenden Federarm 32 vorgesehen bzw. einteilig mit diesem ausgebildet ist. Im dargestellten Ausführungsbei­spiel sind zwei in Richtung der längeren Erstreckung der Stirnwand 15 einander gegenüber liegende Abschnitte des Ringbundes 31 bzw. Federarme 32 vorgesehen, die in Ansicht gem. Fig. 3 ringsegmentförmig ausgebildet und deren Enden gegenüber den flacher gekrümmten Längsseiten des Kappenman­tels 17 geringfügig zurückversetzt und somit gegenüber dem Grundkörper 2 berührungsfrei sind. Die Federarme 32 sind ebenfalls jeweils über einen Bogenwinkel von etwa 90° um die Pumpenachse 30 gekrümmt, so daß sie schalenförmige und auch bei relativ geringer Wandungsdicke relativ hart fe­dernde stabile Federelemente bilden.The stop 25 is formed by a circumferentially divided, radially inwardly projecting ring collar 31, the ring sections of which are each provided on a spring arm 32 which projects freely approximately parallel to the pump axis 30 in the direction of the pump stroke of the pump piston 6 or is formed in one piece therewith. In the exemplary embodiment shown, two sections of the annular collar 31 or spring arms 32 lying opposite one another in the direction of the longer extension of the end wall 15 are provided, which according to FIG. Fig. 3 formed ring segment-shaped and the ends of which are slightly set back relative to the flat, curved longitudinal sides of the cap jacket 17 and are thus contact-free with respect to the base body 2. The spring arms 32 are also each curved over an arc angle of approximately 90 ° about the pump axis 30, so that they form shell-shaped and also relatively hard resilient spring elements with a relatively small wall thickness.

Der Anschlag 25 bzw. die Federarme 32 bilden einen Bestand­teil eines einteiligen, muffenförmigen Anschlagkörpers 33, der an seinem von den freien Enden der Federarme 32 abge­kehrten Ende eine im Abstand zum Anschlag 25 liegende, ringscheibenförmige Endwand 34 aufweist, welche im Bereich des Anschlusses des Austragstutzens 16 mit ihrer Außenseite an einer durch die Innenseite der Stirnwand 15 gebildeten Ringschulter des Grundkörpers 2 anliegt. Der Anschlagkörper 33 ist durch Einsprengen in eine Halteklammer 35 befestigt, welche einteilig mit dem Grundkörper 2 ausgebildet und vorzugsweise durch zwei ringsegmentförmige Klammerbacken 39 gebildet ist, die von der Innenseite der Stirnwand 15 abstehen. Diese Klammerbacken 39, die den Anschlagkörper 33 nur im Bereich der Federarme 32 und auch nur auf einem kleinen Teil seiner Länge an der Außenseite umgreifen, weisen an ihren Innenseiten jeweils eine Ringnut oder dgl. für den Eingriff eines Rastwulstes 38 auf, der etwa in der Ebene der Innenseite der Endwand 34 am Außenumfang des Anschlagkörpers 33 vorgesehen ist und zum federnden, axial gesicherten Einsprengen des Anschlagkörpers 33 in die Halteklammer 35 dient.The stop 25 or the spring arms 32 form part of a one-piece, sleeve-shaped stop body 33 which, at its end remote from the free ends of the spring arms 32, has an annular disk-shaped end wall 34 which is at a distance from the stop 25 and which is in the region of the connection of the discharge nozzle 16 rests with its outside against an annular shoulder of the base body 2 formed by the inside of the end wall 15. The stop body 33 is fastened by being blasted into a holding clamp 35, which is formed in one piece with the base body 2 and is preferably formed by two ring segment-shaped clamp jaws 39, which extend from the inside of the end wall 15 stand out. These clamp jaws 39, which grip the stop body 33 only in the area of the spring arms 32 and also only over a small part of its length on the outside, each have an annular groove or the like on their inner sides for the engagement of a latching bead 38, which is approximately in the Level of the inside of the end wall 34 is provided on the outer circumference of the stop body 33 and is used for resilient, axially secured insertion of the stop body 33 into the retaining clip 35.

Der Anschlag 25 liegt im Abstand von den freien Enden der Federarme 32 bzw. bei zwei vorgesehenen Teilhüben 12, 13 etwa in der Mitte von deren Länge. Zwischen der Anschlag­fläche 27 und den freien, in Ausgangslage gegen den Pumpen­zylinder 5 gerichteten Enden bilden die Federarme 32 an ihren einander zugekehrten Innenflächen Zentrierführungen 36 für den Pumpenzylinder 5, wobei diese Zentrierführungen 36 praktisch durch einen sich zur Anschlagfläche 27 spitz­winklig verjüngenden Innenkonus gebildet sind, dem als Gegenfläche die äußere Umfangskante 37 des offenen Endes des Pumpenzylinders 5 bzw. des Ringbundes 23 zugeordnet ist. In Ausgangstellung liegt der Pumpenzylinder 5 noch vollständig außerhalb des Anschlagkörpers 33 bzw. der Zentrierführung 36. Sobald in der beschriebenen Weise der erste Teilhub 12 durchgeführt wird, taucht das offene Ende des Pumpenzylinders 5 in die Zentrierführung 36 ein, so daß der Pumpenzylinder 5 außer über den Pumpkolben 6 auch unmittelbar gegenüber dem Anschlagkörper 33 bzw. gegenüber dem Grundkörper 2 geführt und zentriert wird.The stop 25 lies at a distance from the free ends of the spring arms 32 or, in the case of two partial strokes 12, 13 provided, approximately in the middle of their length. Between the stop surface 27 and the free ends directed towards the pump cylinder 5 in the starting position, the spring arms 32 form centering guides 36 for the pump cylinder 5 on their mutually facing inner surfaces, these centering guides 36 being practically formed by an inner cone tapering at an acute angle to the stop surface 27 the outer peripheral edge 37 of the open end of the pump cylinder 5 or the collar 23 is assigned as the counter surface. In the starting position, the pump cylinder 5 is still completely outside the stop body 33 or the centering guide 36. As soon as the first partial stroke 12 is carried out in the manner described, the open end of the pump cylinder 5 plunges into the centering guide 36, so that the pump cylinder 5 except over the pump piston 6 is also guided and centered directly with respect to the stop body 33 or with respect to the base body 2.

Am Ende des ersten Teilhubes 12 schlägt die Gegenanschlag­fläche 28 an der Anschlagfläche 27 an, wodurch der weiteren Betätigung der Austragvorrichtung 1 ein erheblicher bzw. zumindest deutlicher Widerstand entgegengesetzt wird. Wird dieser Widerstand durch entsprechend kräftigere Betätigung überwunden, so werden die Federarme 32 infolge der Auflauf­schräge 29 nach außen gedrückt, bis sie mit den an die Auflaufschärge 29 anschließenden Innenumfangsflächen der Ringbunde 31 am Außenumfang des Pumpenzylinders 5 bzw. des Ringbundes 23 gleiten. Mit Überwinden der Anschlagfläche 27 beginnt somit der zweite Teilhub 13. Am Ende des letzten Teilhubes 13 kann die Gegenanschlagfläche 28 an einer weiteren Anschlagfläche 27′ des Anschlagkörpers 33 anschla­gen, wobei diese Anschlagfläche 27′ zweckmäßig durch die Innenseite der Endwand 34 gebildet und so angeordnet ist, daß gleichzeitig die vordere Endfläche des Pumpkolbens 6 am Zylinderboden 22 anschlägt. Die Endwand 34 wird von der Kolbenhülse 19 bzw. der Kolbenstange durchsetzt, so daß sie zu deren Lagestabilisierung beitragen kann.At the end of the first partial stroke 12, the counter abutment surface 28 abuts the abutment surface 27, as a result of which considerable or at least significant resistance is opposed to the further actuation of the discharge device 1. Becomes this resistance overcome by correspondingly stronger actuation, the spring arms 32 are pressed outwards as a result of the run-up slope 29 until they slide with the inner peripheral surfaces of the annular collars 31 adjoining the run-up coulters 29 on the outer circumference of the pump cylinder 5 or the annular collar 23. By overcoming the stop surface 27, the second partial stroke 13 begins. At the end of the last partial stroke 13, the counter-stop surface 28 can strike another stop surface 27 'of the stop body 33, this stop surface 27' being expediently formed by the inside of the end wall 34 and so arranged that at the same time the front end surface of the pump piston 6 strikes the cylinder base 22. The end wall 34 is penetrated by the piston sleeve 19 or the piston rod, so that it can help stabilize its position.

Damit der Pumpenzylinder 5 bzw. der Medien-Speicher 3 nach dem Aufsetzen auf den Pumpkolben 6 oder zumindest nach Durchführung des ersten oder des letzten Teilhubes nicht mehr von der übrigen Austragvorrichtung 1 abgenommen werden kann, ist eine Abziehsicherung 40 vorgesehen. Diese weist im dargestellten Ausführungsbeispiel mindestens eine in Hubrichtung gegenüber dem Grundkörper 2 im wesentlichen feststehende Sperrschulter 41 auf, der am Pumpenzylinder 5 eine Gegenschulter 42 so zugeordnet ist, daß diese Gegen­schulter 42 in der Sperrlage von der Sperrschulter 41 hintergriffen wird. Die nach Art einer Sperrzange federnd aufweitbare Sperrschulter 41 kann in einfacher Weise durch die von der Anschlagfläche 27 abgekehrte bzw. der Anschlag­fläche 27′ zugekehrte Schulterfläche des Ringbundes 31 gebildet sein, die in einem Abstand von der Anschlagfläche 27′ liegt, welcher im wesentlichen gleich wie die Axialer­streckung des Ringbundes 23 des Pumpenzylinders 5 ist. Dadurch kann die Gegenschulter 42 durch die von der offenen Endfläche abgekehrte, ringförmige Stirnfläche des Ringbun­des 23 gebildet sein, an dessen Außendurchmesser die Innen­weite der Federarme 32 zwischen der Sperrschulter 41 und der Anschlagfläche 27′ angepaßt ist. Liegt der Ringbund 23 in diesem Bereich, so ist er in Achsrichtung der Austrag­vorrichtung 1 formschlüssig gegenüber dem Grundkörper 2 gesichert, so daß ein Abziehen des Pumpenzylinders 5 nur unter Zerstörung der Austragvorrichtung 1 bzw. zumindest des Anschlagkörpers 33 möglich ist.To ensure that the pump cylinder 5 or the media reservoir 3 can no longer be removed from the rest of the discharge device 1 after it has been placed on the pump piston 6 or at least after the first or the last partial stroke, a pull-off protection 40 is provided. In the exemplary embodiment shown, this has at least one locking shoulder 41 which is essentially fixed in the lifting direction with respect to the base body 2 and to which a counter shoulder 42 is assigned on the pump cylinder 5 such that this counter shoulder 42 is engaged by the locking shoulder 41 in the locked position. The resiliently expandable locking shoulder 41 in the manner of locking pliers can be formed in a simple manner by the shoulder surface of the annular collar 31 which faces away from the stop surface 27 or the stop surface 27 'and which is at a distance from the stop surface 27', which is essentially the same as is the axial extent of the collar 23 of the pump cylinder 5. This allows the counter shoulder 42 through the from the open End face facing away, annular end face of the collar 23 may be formed, on the outer diameter of the inner width of the spring arms 32 between the locking shoulder 41 and the stop surface 27 'is adapted. If the annular collar 23 lies in this area, it is positively secured in relation to the base body 2 in the axial direction of the discharge device 1, so that the pump cylinder 5 can only be removed by destroying the discharge device 1 or at least the stop body 33.

Während bei der Ausführungsform nach den Figuren 1 bis 3 die die Handhabe 14 bildende Stirnwand 15 im wesentlichen eben ausgebildet ist, ist diese Handhabe 14a bei der Aus­führungsform nach den Figuren 4 und 5 durch zwei kuhlenför­mige bzw. in Ansicht gem. Fig. 4 konkav gehöhlte Fingerver­tiefungen gebildet, die von den schmalen Enden der Stirn­wand jeweils über einen Bogenwinkel von etwa 90° zum Aus­tragstutzen 16a anteigen. Dadurch liegt die Austragvorrich­tung 1a sehr sicher in der Hand.While in the embodiment according to FIGS. 1 to 3 the end wall 15 forming the handle 14 is essentially flat, this handle 14a in the embodiment according to FIGS. 4 and 5 is formed by two cupped or in view according to. Fig. 4 concave hollowed finger depressions formed, which rise from the narrow ends of the end wall in each case over an arc angle of about 90 ° to the discharge nozzle 16a. As a result, the discharge device 1a lies very securely in the hand.

Claims (11)

1. Austragvorrichtung (1) für fließfähige Medien, mit einem Grundkörper (2) für die Aufnahme eines Medien-­Speichers (3) und einer Schubkolbenpumpe (4), die einen an der Kolbenlaufbahn (7) eines Pumpenzylinders (5) zwischen einer Ausgangslage (Fig. 2) und einer Pumphub-Endlage verschiebbar geführten Pumpkolben (6) sowie eine durch den Pumpenzylinder (5) und den Pump­kolben (6) begrenzte, mit einer Austragöffnung (10) der Vorrichtung (1) über einen Auslaßkanal (9) verbun­dene Pumpenkammer (8), dadurch gekennzeichnet, daß der Pumpkolben (6) und der Pumpenzylinder (5) gegenein­ander um einen Teilhub bewegbar angeordnet sind.1. Discharge device (1) for flowable media, with a base body (2) for receiving a media reservoir (3) and a push piston pump (4), which on the piston track (7) of a pump cylinder (5) between a starting position ( Fig. 2) and a pump stroke end position displaceably guided pump piston (6) and a by the pump cylinder (5) and the pump piston (6) limited, with a discharge opening (10) of the device (1) via an outlet channel (9) connected pump chamber (8), characterized in that the pump piston (6) and the pump cylinder (5) are arranged to be movable relative to one another by a partial stroke. 2. Austragvorrichtung, insbesondere nach Anspruch 1, gekennzeichnet durch eine höchstens bis an die Kolben­laufbahn (7) reichende Begrenzungseinrichtung (24) zur Verringerung des Austragvolumens auf mindestens ein Teilvolumen, wobei vorzugsweise die Pumpenkammer (8) als das Austragvolumen je Pumphub (11) bestimmende Dosierkammer ausgebildet ist.2. Discharge device, in particular according to claim 1, characterized by a limiting device (24) which at most extends up to the piston raceway (7) for reducing the discharge volume to at least one Partial volume, the pump chamber (8) preferably being designed as a metering chamber which determines the discharge volume per pump stroke (11). 3. Austragvorrichtung, insbesondere nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Begrenzungsein­richtung (24) im wesentlichen außerhalb der Kolben­laufbahn (7), insbesondere an der Außenseite des Pumpenzylinders (5) liegt.3. Discharge device, in particular according to claim 1 or 2, characterized in that the limiting device (24) is substantially outside the piston race (7), in particular on the outside of the pump cylinder (5). 4. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß die Begrenzungseinrichtung (24) wenigstens einen einem Gegenanschlag (26) zugeordneten Anschlag (25), wie einen den Pumphub (11) auf mindestens einen Teilhub (12, 13) begrenzenden Hubanschlag aufweist, wobei vorzugsweise der Anschlag (25) an einem gegenüber dem Pumpenzylinder (5) mit dem Pumpkolben (6) bewegbaren Bauteil vorgesehen und insbesondere der Gegenanschlag (26) durch den Pumpenzylinder (5) gebildet ist.4. Discharge device, in particular according to one of the preceding claims, characterized in that the limiting device (24) at least one stop (26) associated stop (25), such as a the pump stroke (11) to at least one partial stroke (12, 13) limit Stroke stop, the stop (25) is preferably provided on a component that is movable with the pump piston (6) relative to the pump cylinder (5), and in particular the counter stop (26) is formed by the pump cylinder (5). 5. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß die Begrenzungseinrichtung (24) für den Austrag eines weiteren Teilvolumens (13) auslösbar, insbesondere als unter vorbestimmter Pump-Betätigungskraft überwindbare Rast ausgebildet ist, wobei vorzugsweise der Anschlag (25) federnd ausgebildet, insbesondere an einem zur Pumpenachse (30) etwa parallelen Federarm (32) vor­gesehen ist und/oder eine Auflaufschräge (29) für den Gegenanschlag (28) aufweist..5. Discharge device, in particular according to one of the preceding claims, characterized in that the limiting device (24) for the discharge of a further partial volume (13) can be triggered, in particular is designed as a latch that can be overcome under a predetermined pump actuation force, preferably the stop (25). designed to be resilient, in particular provided on a spring arm (32) approximately parallel to the pump axis (30) and / or having a run-on slope (29) for the counter-stop (28). 6. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß ein Anschlag (25) der Begrenzungseinrichtung (24) außer­ halb des Pumpenzylinders (5) leigt bzw. einer als Gegenanschlagfläche (28) vorgesehenen Endfläche des Pumpenzylinders (5) zugeordnet ist, und insbesondere in einer insbesondere kappenförmigen Betätigungshand­habe (14) für die Schubkolbenpumpe (4) liegt, wobei sich der Anschlag (25) vorzugsweise bundartig um die Pumpenachse (30) erstreckt, insbesondere durch min­destens einen inneren Ringbund (31) gebildet ist, der in Umfangsrichtung unterteilt ist.6. discharge device, in particular according to one of the preceding claims, characterized in that a stop (25) of the limiting device (24) except half of the pump cylinder (5) or is assigned to an end surface of the pump cylinder (5) provided as a counter stop surface (28), and in particular lies in an especially cap-shaped actuating handle (14) for the push piston pump (4), the stop (25) preferably extends like a collar around the pump axis (30), in particular is formed by at least one inner annular collar (31) which is divided in the circumferential direction. 7. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß ein Anschlag (25) der Begrenzungseinrichtung (24) nach Art einer federnd aufspreizbaren Klammer ausgebildet, insbesondere durch mindestens zwei teilhülsenförmige Federarme (32) gebildet ist, wobei der Anschlag (25) vorzugsweise durch einen muffenförmigen Anschlagkörper (33) gebildet ist, der insbesondere eine Endwand (34) sowie von dieser abstehend die Federarme (32) auf­weist, und/oder durch Einsprengen in eine ihn am Außenumfang umgreifende Halteklammer (35) befestigt ist.7. Discharge device, in particular according to one of the preceding claims, characterized in that a stop (25) of the limiting device (24) is designed in the manner of a resiliently expandable clamp, in particular is formed by at least two partially sleeve-shaped spring arms (32), the stop (25 ) is preferably formed by a sleeve-shaped stop body (33), which in particular has an end wall (34) and the spring arms (32) projecting therefrom, and / or is fastened by being pushed into a retaining clip (35) which surrounds it on the outer circumference. 8. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß vor einen Anschlag (25) der Begrenzungseinrichtung (24) bzw. dessen Anschlagfläche (27) eine Zentrierführung (36) zur gegenseitigen Ausrichtung des Pumpenzylinders (5) und des Pumpkolbens (6) bzw. des Grundkörpers (2) vorgesehen ist, die vorzugsweise durch mindestens eine konische Innenfläche des Anschlagkörpers (33) gebildet ist.8. discharge device, in particular according to one of the preceding claims, characterized in that in front of a stop (25) of the limiting device (24) or its stop surface (27) a centering guide (36) for mutual alignment of the pump cylinder (5) and the pump piston ( 6) or the base body (2) is provided, which is preferably formed by at least one conical inner surface of the stop body (33). 9. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß der Medien-Speicher (3) durch den insbesondere napfför­migen, am Zylinderboden (22) geschlossenen Pumpenzy­linder (5) gebildet ist, der vorzugsweise als nach Öffnen eines Verschlusses auf den Pumpkolben (6) aufsteckbares gesondertes Gefäß ausgebildet ist.9. Discharge device, in particular according to one of the preceding claims, characterized in that the media store (3) is formed by the in particular cup-shaped, on the cylinder bottom (22) closed pump cylinder (5), which preferably as after opening a closure on the pump piston (6) detachable separate vessel is formed. 10. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß der Grundkörper (2) durch die Betätigungshandhabe (14) gebildet ist, die vorzugsweise in einem vorstehenden Austragstutzen (16) einen den innerhalb der Handhabe (14) liegenden Pumpkolben (6) bildenden Kolbenschaft (20) und an der Innenseite einer den Austragstutzen (16) tragenden Stirnwand (15) den Anschlag (25) auf­nimmt.10. Discharge device, in particular according to one of the preceding claims, characterized in that the base body (2) is formed by the actuating handle (14) which, preferably in a protruding discharge nozzle (16), has a pump piston (6) lying inside the handle (14) ) forming piston shaft (20) and on the inside of a discharge wall (16) carrying end wall (15) receives the stop (25). 11. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, gekennzeichnet durch eine Rückhub- bzw. Abziehsicherung (40) für den am Ende mindestens eines Teilhubes (13) bzw. des Pumphubes (11) stehenden Pumpenzylinder (5), wobei die Abzieh­sicherung (40) insbesondere durch den Anschlag (25) gebildet ist, der vorzugsweise eine Gegenschulter (32) des Pumpenzylinders (5) widerhakenartig hintergreift.11. Discharge device, in particular according to one of the preceding claims, characterized by a return stroke or pull-off protection (40) for the pump cylinder (5) standing at the end of at least one partial stroke (13) or the pump stroke (11), the pull-off protection (40 ) is formed in particular by the stop (25), which preferably engages behind a counter shoulder (32) of the pump cylinder (5) like a barb.
EP88116290A 1987-10-10 1988-10-01 Device for dispersing a fluid Expired - Lifetime EP0311863B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88116290T ATE84229T1 (en) 1987-10-10 1988-10-01 DISPENSING DEVICE FOR FLOWABLE MEDIA.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3734306 1987-10-10
DE19873734306 DE3734306A1 (en) 1987-10-10 1987-10-10 DISCHARGE DEVICE FOR FLOWABLE MEDIA

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EP0311863A2 true EP0311863A2 (en) 1989-04-19
EP0311863A3 EP0311863A3 (en) 1990-01-24
EP0311863B1 EP0311863B1 (en) 1993-01-07

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US (1) US4946069A (en)
EP (1) EP0311863B1 (en)
JP (1) JP2660561B2 (en)
AT (1) ATE84229T1 (en)
DE (2) DE3734306A1 (en)

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Also Published As

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JP2660561B2 (en) 1997-10-08
DE3877309D1 (en) 1993-02-18
US4946069A (en) 1990-08-07
EP0311863B1 (en) 1993-01-07
EP0311863A3 (en) 1990-01-24
ATE84229T1 (en) 1993-01-15
DE3734306A1 (en) 1989-04-27
JPH01139376A (en) 1989-05-31

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