WO2018184659A1

WO2018184659A1 - Handheld pressure cleaner

Info

Publication number: WO2018184659A1
Application number: PCT/EP2017/057889
Authority: WO
Inventors: Vitali Fischer
Original assignee: Alfred Kärcher SE & Co. KG
Priority date: 2017-04-03
Filing date: 2017-04-03
Publication date: 2018-10-11

Abstract

The invention relates to a handheld pressure cleaner (10) for emitting a pressurised cleaning liquid, comprising a housing (12) comprising an upper housing part (14) and a pistol grip (16), en electric motor (38) and a pump (42) being arranged in the upper housing part (14) and the pistol grip (16) having a lower end region (30) to which a coupling device (104) is connected, on which a rechargeable battery (102) is arranged, and the pressure cleaner (10) comprises a hose connection part (58) that is connected to a pump inlet (44) by means of a flow through an inflow line (52). The aim of the invention is improve the handheld pressure cleaner (10) such that it is easier to handle. To this end, the hose connection part (58) is arranged on the lower end region (30) of the pistol grip (16) and at least one first line section (68) of the inflow line (52) is arranged in the pistol grip (16) and the coupling device (104) has a guiding surface (106) opposite the upper housing part (14) and an abutment surface (108) arranged between the guiding surface (106) and the hose connection part (58). The battery (102) can be connected to the coupling device (104) by moving along the guiding surface (106) towards the abutment surface (108) and can be applied to the abutment surface (108) and detached from the coupling device (104) by moving along the guiding surface (106) away from the abutment surface (108).

Description

HAND-HELD PRESSURE CLEANER

The invention relates to a hand-held pressure cleaning device for dispensing a pressurized cleaning fluid, comprising a housing having a housing top and a protruding from a bottom of the housing shell pistol grip, wherein arranged in the housing upper part, an electric motor and driven by this pump with a pump inlet and a pump outlet and the pistol grip having a spaced from the upper housing portion disposed at the lower end portion, which is followed by a coupling device to which a rechargeable battery is detachably held, and wherein the pressure cleaning device has a hose connector which is in flow communication via an input line to the pump inlet.

With the help of such a pressure cleaning device, a cleaning liquid, preferably water, can be pressurized and directed to a surface to be cleaned. The pressure cleaning device can be held by the user in the manner of a spray gun by hand. The pressure cleaning device has an upper housing part, from which a pistol grip protrudes downwards. In the upper housing part, an electric motor and a driven by this pump are arranged. By means of the pump, the cleaning liquid can be pressurized. The pressure of the cleaning liquid can be more than 10 bar, for example 15 bar to 30 bar, in particular 20 bar. The pump has a pump inlet to which the pressurized cleaning liquid to be supplied via an input line from a hose connector. A cleaning fluid hose, in particular a water hose, can be connected to the hose connection part.

In addition, the pump has a pump outlet through which the pumped by the pump under pressure cleaning fluid can be discharged. The pistol grip can be grasped by the user by hand. It is located below the upper housing part, so that the user can support the upper housing part with his hand. The pistol grip has an upper end portion associated with the thumb and forefinger of the user and adjoining the upper housing portion. In addition, the pistol grip on a lower end portion which is spaced from the housing upper part.

At the lower end of the pistol grip is followed by a coupling device to which a rechargeable battery is releasably held. With the help of the battery, the electric motor can be supplied with electrical energy.

A pressure cleaning device of the type mentioned is known from document US 2016/0236217 AI. In this device, the coupling device is arranged on the housing upper part facing away from the end of the pistol grip. For connection, the battery must be inserted from behind into the coupling device, and for release, the battery must be pulled backwards out of the coupling device. Before the coupling device, a hose connection part is arranged, which is in flow communication with the pump inlet via the input line, wherein the input line extends within a protective bracket. In order to avoid that liquid can pass from the hose connecting part to the battery, a thin splash guard wall is arranged between the hose connecting part and the battery, which protrudes from the underside of the protective strap.

Object of the present invention is to develop a pressure cleaning device of the type mentioned in such a way that it has a simpler handling.

This object is achieved in a hand-held pressure washer of the generic type according to the invention that the hose connector is arranged at the lower end of the pistol grip and at least a first line section of the input line in the pistol grip extends and the coupling device has a housing upper part facing away from the guide surface and arranged between the guide surface and the hose connector and aligned at an angle to the coupling surface abutment surface, the battery is connected by displacement along the guide surface in the direction of the stop surface with the coupling device and can be applied to the stop surface and by displacement along the coupling surface in the direction of the stop surface facing away from the coupling device is releasable.

In the pressure cleaning device according to the invention, the hose connection part is arranged at the lower end region of the pistol grip. To the hose connector part, a cleaning fluid hose, in particular a water hose can be connected, which can be positioned behind the user. This facilitates the user's handling of the pressure cleaning device, since it is not hindered by the detergent hose.

A further simplification of the handling of the pressure cleaning device is achieved according to the invention in that the coupling device has a guide surface facing away from the housing top and an abutment surface oriented at an angle to the guide surface, wherein the stop surface is arranged between the guide surface and the hose connection part. If the battery is to be connected to the coupling device, then the user can move it along the guide surface as far backwards in the direction of the stop surface until it has an end face on the

Stop surface comes to the plant. The stop surface thus defines the position of use of the battery, in which they can supply the electric motor with energy. If the battery is to be disconnected from the coupling device, the user can move it along the guide surface forward in the direction away from the stop surface. The replacement of the battery is thus very easy for the user.

The battery can be applied with an end wall to the stop surface. The stop surface thus defines the position of use of the battery. Equal- At the same time, the stop surface, due to its positioning between the hose connection part and the guide surface, reduces the risk that cleaning fluid can pass from the hose connection part to the battery.

The stop surface is aligned at an angle to the guide surface. It is advantageous if the stop surface is aligned perpendicular to the guide surface.

In an advantageous embodiment of the invention, the stop surface is arranged on a support foot which projects from the lower end region of the pistol grip. With the help of the support foot, the pressure cleaning device can be supported on a support surface. The support leg is located between the hose fitting and the battery and reduces the risk of cleaning fluid getting to the battery.

Preferably, the support foot on a plurality of reinforcing ribs. This gives the support leg a high mechanical strength.

The support foot expediently extends at least up to the underside of the battery facing away from the upper housing part, so that the pressure-cleaning device can also be supported on a support surface via the support foot even when the battery is connected to the coupling device.

It is advantageous if the pressure cleaning device has a protective bracket, which extends from the lower end region of the pistol grip to the upper housing part and surrounds a handle opening together with the upper housing part and the pistol grip. If the user grips the pistol grip with his hand, he can engage his fingers in the grip opening.

Preferably, the housing forms the guard.

In an advantageous embodiment of the invention, the protective bar has a first protective bar section and a second protective bar section, wherein the first protective bar section adjoins the lower end region of the Pistol grip connects and facing away from the housing top outside the guide surface, and wherein the second guard section extends from the first guard bracket portion to the upper housing part.

In the first protective bow section, in an advantageous embodiment of the invention, a locking element which can be moved back and forth between a locking position and a release position is arranged for locking the battery to the coupling device. If the battery assumes its position of use, in which one end face of the battery bears against the stop surface, then it can be fixed to the coupling device with the aid of the locking member. For this purpose, the locking member assumes a locking position. If the battery is to be disconnected from the coupling device, then the locking member can be moved to a release position in which it releases the battery.

It is advantageous if the locking member is biased by means of a spring element in the locking position.

The locking member is conveniently mechanically coupled to a manually operable release member. The release member can be actuated by the user to transfer the locking member from its locking position to its release position.

The release member is mounted displaceably or pivotably in an advantageous embodiment of the invention on the housing of the pressure-cleaning device.

It is advantageous if the release member is movably held on the second guard section. In particular, it can be provided that the release member is slidably held on the second guard section. The release member may be configured, for example in the form of a sliding element, which is mounted in particular displaceably on the second guard section. Preferably, the release member is integrated into the outer contour of the second guard section.

The locking member is configured in a preferred embodiment of the invention as a rocker arm, which is movable by pressing the release member against a resilient restoring force from its locking position into its release position.

The rocker arm preferably has two lever arms. A first lever arm may carry at its free end a locking member, for example a locking element, which cooperates with a complementary configured locking element of the battery to form a releasable latching connection. A second lever arm may carry at its free end a force receiving element on which a return spring is supported and which can be acted upon by the release member with a spring force of the return spring counteracting actuating force to pivot the rocker arm from its locking position to its release position.

A further simplification of the handling is achieved in a preferred embodiment of the pressure cleaning device according to the invention characterized in that the pistol grip, a manually operable control is arranged to control the delivery of the cleaning liquid. With the help of the control, the discharge of cleaning liquid can be started and stopped. The control is accessible to the user in a very simple manner, since it is arranged on the pistol grip.

In particular, it can be provided that the control is arranged at the upper end region of the pistol grip, which the user can embrace with his index finger and his middle finger. When gripping the pistol grip, the user intuitively also grasps the control element, and by operating According to the control, the user can initiate the dispensing of cleaning fluid and, if necessary, stop it again.

It can be provided, for example, that the electric motor can be switched on and off by actuating the control. In such an embodiment of the invention, an electrical connection between the battery and the electric motor can be made by means of the control and interrupted if necessary.

It can be provided, for example, that the control for switching on and off of the electric motor interacts with an electrical switching element. By operating the control element, the switching state of the switching element can be changed in order to selectively establish or interrupt an electrical connection between the battery and the electric motor.

The control may, for example, have a control arm, which cooperates with a switching plunger of the electrical switching element.

Alternatively or in addition to the switching on and off of the electric motor by means of the control can also be provided that by means of the control, the flow connection between the hose connector and the pump inlet is selectively releasable and interruptible. The control element can cooperate, for example, with a valve with the aid of which said flow connection can be established and interrupted.

It is particularly advantageous if by means of the control both the electric motor on and off as well as the flow connection between the hose connection part and the pump inlet can be made and interrupted. This allows the supply of cleaning liquid to the pump inlet to be stopped when the electric motor is turned off, and to start the supply of cleaning liquid to the pump inlet when the electric motor is turned on. As already mentioned, the hose connection part is in fluid communication with the pump inlet via the inlet line. It is advantageous if in the input line, a valve is arranged, which has a closing body which rests in a closed position close to a valve seat and is movable by actuation of the control element in an open position spaced from the valve seat. Such a configuration makes it possible to selectively establish and interrupt the flow connection between the hose connector and the pump inlet by means of the control. If the flow connection is to be established, the user can move the closure member of the valve into an open position spaced from the valve seat by actuation of the control element, so that cleaning fluid flows from the hose connector via the input line to the pump inlet and then pressurized by the pump and pumped via the pump outlet. let it be delivered. If the flow connection is interrupted, the user can release the control, so that the closing body assumes its closed position, in which it rests tightly against the valve seat.

Conveniently, the control is coupled via a plunger with the closing body of the valve. From the control, a force can be exerted on the closing body via the plunger so that it performs a movement relative to the valve seat.

It is advantageous if the plunger engages through a passage opening into the inlet line, wherein it is surrounded in the passage of a sealing element, such as a sealing ring. With a control element facing the first end portion of the plunger protrudes from the passageway, and with a control element remote from the second end portion of the plunger dips into the input line and cooperates with the closing body of the valve. It can be provided that the plunger has at its end remote from the control end an inclined surface which cooperates with a complementary configured inclined surface of the closing body.

By moving the plunger in the direction of the closing body, the two inclined surfaces can slide along each other, in particular around the

Move closing body from its closed position to its open position.

It is advantageous if the plunger from the control against a resilient return force in the direction of the closing body is movable. By moving the control, the plunger can be moved in the direction of the closing body to convert it into its open position. If the control is released, the plunger is moved in the direction away from the closing body due to the spring-elastic restoring force acting on it and the closing body can assume its closed position.

In a preferred embodiment of the invention, the closing body in the input line is held non-rotatably and linearly displaceable.

It is advantageous if the closing body is held linearly displaceable by means of guide elements in the input line. By using the guide elements, a rotational movement of the closing body about its longitudinal axis can be prevented in a simple manner. This is particularly advantageous if the closing body has a recess into which engages the end region of the plunger facing away from the control element. By the guide elements, the sliding in the input line closing body a certain rotational position can be specified, in which the plunger can dip into the recess.

It can be provided, for example, that the closing body has at least one first guide element which engages with a second guide element arranged in the input line. The guide elements may be formed, for example, in the form of guide ribs and guide grooves. Thus, for example, be provided that the closing body has at least one guide rib which engages in a guide groove of the input line.

Preferably, the closing body on two diametrically opposed guide ribs, which engage in each case in a guide groove of the input line.

To further simplify the handling of the pressure cleaning device, it is advantageous if the control forms a control lever which protrudes from the pistol grip and is mounted pivotably about a pivot axis.

Preferably, the control lever is disposed at the upper end portion of the pistol grip and protrudes from a front of the pistol grip, wherein the user can grip the control lever at least with his index finger and advantageously also with his middle finger.

The control is conveniently movable back and forth between a rest position and an actuated position. In order to prevent inadvertent discharge of cleaning fluid, it is advantageous if the control can be locked in its rest position.

To lock the control element, for example, a blocking element can be used, which can be moved back and forth between a blocking position and a release position.

Preferably, the locking member in the release position and / or in the locked position can be latched.

The locking member is conveniently movable on the pistol grip, in particular slidably mounted. It is particularly advantageous if the blocking member passes through the pistol grip and is manually displaceable back and forth between the locking position and the release position. Preferably, the blocking member has a first end side and a second end side facing away from the first end side and, in the release position, terminates flush with the pistol grip with its two end sides. If the locking member is moved to its blocking position, it dives with one of its two end sides into the pistol grip and protrudes with the other end side out of the pistol grip.

It is advantageous if the blocking member has a recess which is arranged offset in the blocking position to a projection of the control and which is arranged in the release position in alignment with the projection. The aligned arrangement of the recess allows movement of the control, wherein the projection is immersed in the recess. If the recess is offset relative to the projection, this blocks movement of the control element.

The locking member may for example be designed in the form of a bolt which is displaceably mounted in the pistol grip and has a recess into which a projection of the control can dip when the bolt assumes its release position. If the bolt assumes its blocking position, it blocks movement of the control element.

A particularly compact design is achieved in an advantageous embodiment of the invention characterized in that the input line in addition to the arranged in the pistol grip first line section has a second longitudinal portion which is arranged in the upper housing part.

It can be provided that the first longitudinal section extends virtually over the entire length of the pistol grip. At the free end of the first longitudinal portion of the hose connecting part is conveniently connected. For example, it can be provided that the hose connection part a Nipple forms, which dips with the interposition of a sealing element in an end region of the first longitudinal section of the input line. It can also be used a reverse embodiment, in which the first longitudinal section of the input line forms a nipple, which dips into a complementarily configured sleeve of the hose connector with the interposition of a sealing element.

The arranged in the upper housing part second longitudinal portion of the input line is advantageously aligned parallel to a common longitudinal axis of the electric motor and the pump.

A transmission device can be arranged between the electric motor and the pump, and the second longitudinal section of the input line can be positioned laterally next to the transmission device and the pump.

The second longitudinal section of the input line can be connected directly to the pump inlet. Alternatively it can be provided that the second longitudinal section of the input line is in flow communication with the pump inlet via a connecting line. The connecting line can be configured, for example, in the form of an angle piece.

The following description of an advantageous embodiment of the invention is used in conjunction with the drawings for further explanation. Show it :

Figure 1 is a side view of an advantageous embodiment of a hand-held pressure cleaning device according to the invention;

Figure 2 is a longitudinal sectional view of the pressure cleaning device of Figure 1;

Figure 3 is a perspective, partially separated view of an input line with integrated valve of the pressure cleaning device of Figure 1; Figure 4 is a sectional view taken along the line 4-4 in Figure 2, wherein a locking member assumes a blocking position in which it blocks a control, and a housing of the pressure cleaning device is hidden;

Figure 5 is a sectional view corresponding to Figure 4, wherein the locking member a

Release position occupies, in which it does not block the control, and a housing of the pressure cleaning device is hidden.

In the drawing, an advantageous embodiment of a hand-held pressure-cleaning device according to the invention is shown schematically and overall occupied by the reference numeral 10. The pressure-cleaning device 10 has a housing 12 with an elongated housing upper part 14, a pistol grip 16 and a safety bar 18. The housing upper part 14 has a front side 20 and a rear side 22, an upper side 24 and a lower side 26.

The pistol grip 16 adjoins the underside 26 of the housing upper part 14 and has an upper end region 28 and a lower end region 30. The upper end region 28 adjoins the upper housing part 14 and the lower end region 30 is positioned at a distance from the upper housing part 14. The pistol grip 16 can be gripped by the user with the hand, with the upper end portion 28 associated with the user's thumb and index finger.

The guard 18 connects the lower end portion 30 of the pistol grip 16 to a front housing portion 32 of the housing top 14. Together with a central housing portion 34 of the housing top 14 and the pistol grip 16, the guard 18 surrounds a handle opening 36 into which the user grasps the pistol grip 16 can intervene with his fingers. In the upper housing part 14, an electric motor 38, a transmission device 40 and a pump 42 are arranged, wherein they extend along a common longitudinal axis 43. The pump 42 can be driven by the electric motor 38 via the transmission device 40. The pump 42 has a pump inlet 44 and a pump outlet 46. To the pump outlet 46, an output line 48 is connected, which passes through a arranged on the front side 20 of the upper housing part 14 housing opening 50.

The pump inlet 44 is connected via an input line 52 and designed as an angle 54 connecting line 56 with a hose connector 58 in fluid communication, which is arranged at the lower end portion 30 of the pistol grip 16 on the front side 20 of the upper housing part 14 facing away from back 60. The hose connection part 58 passes through a second housing opening 62. A cleaning fluid hose, in particular a water hose, for example a garden hose, can be connected to the hose connection part 58. For this purpose, for example, a hose nipple 64 can be used, which can be screwed onto an end piece 66 of the hose connecting part 58 projecting out of the housing 12.

The input line 52 has a first line section 68 and a second line section 70 connected in one piece to the first line section 68 and directly adjoining the first line section 68. The first line section 68 is arranged in the pistol grip 16 and the second line section 70 is arranged laterally next to the transmission device 40 and the pump 42 in the upper housing part 14.

In the transition region between the first line section 68 and the second line section 70, the input line 52 forms a valve seat 72. Upstream of the valve seat 72 opens into the input line 52, a through-passage 74 which is penetrated by a plunger 76. In the passage 74, the plunger 76 is surrounded by a sealing ring 78, which ensures that no cleaning liquid can escape from the inlet line 52 via the passage 74. The plunger 76 forms with its protruding from the passageway 74 end of a T-shaped plunger head 80 and is surrounded by a first return spring 82, which is supported on the one hand on the plunger head 80 and on the other hand on the outside of the input line 52.

In its end region dipping into the input line 52, the plunger 76 forms a first inclined surface 84, against which a complementarily configured second inclined surface 86 of a closing body 88 slidably rests. The closing body 88 is held in the first line section 68 of the input line 52 so as to be displaceable and non-rotatable in the longitudinal direction and can assume a closed position in which it rests against the valve seat 72 in a liquid-tight manner. By moving the plunger 76 in the direction of the closing body 88 of the closing body can be moved due to the co-operating inclined surfaces 84 and 86 from its closed position into a valve seat 72 spaced open position. In the open position, the closing body 88 releases a flow connection between the hose connecting part 58 and the pump inlet 44. In combination with the valve seat 72, the closing body 88 forms a valve.

The closing body 88 is guided linearly in the input line 52. For this purpose, it has first guide elements in the form of guide ribs 89, 91, which are diametrically opposed to one another and in each case dip into a guide groove 93 or 95. The guide grooves 93, 95 extend along the inside of the first longitudinal section 68 of the input line 52 and form second guide elements, with which the first guide elements are engaged.

The plunger 76 is pressed by the return spring 82 against a control element 90, which is configured in the illustrated embodiment as a control lever 92. The control lever 92 is held about a pivot axis 94 pivotally connected to an integrally connected to the second line section 70 of the input line 52 boom 96. The control lever 92 protrudes in the upper End portion 28 out of the pistol grip 16 and can be encompassed by the user when gripping the pistol grip 16 with the index finger and the middle finger.

In the area of the arm 96, the control lever 92 forms a control arm 98, which cooperates with a switching tappet of an electrical switching element 100. By pivoting the control lever 92 about the pivot axis 94 from a rest position to an actuating position, the plunger 76 can be displaced against the force of the return spring 82 in the direction of the closing body 88, so that the closing body 88 lifts off from the valve seat 72 and assumes an open position. and on the other hand can be actuated by the control arm 98, the electrical switching element 100, with the aid of the electric motor 38 is turned on.

If the user releases the control lever 92, then the plunger 76 is pressed in the direction away from the input line 52 due to the force of the return spring 82 acting on it. At this time, the plunger moves the closing body 88 toward the valve seat 72, and under the action of the pressure of the cleaning liquid, the closing body 88 is pressed against the valve seat 72, so that the flow communication between the hose fitting 58 and the pump inlet 44 is interrupted. The force of the return spring 82 is transmitted from the plunger head 80 to the control lever 92, so that it is pivoted back from its operating position to its rest position and simultaneously the switch plunger of the electrical switching element 100 is relieved by the control arm 98, so that the switching element 100, the electric motor 38 turns off ,

To supply the electric motor 38 with electrical energy, the pressure-cleaning device 10 has a rechargeable battery 102, which is detachably held on a coupling device 104. The coupling device 104 has a guide surface 106 facing away from the housing upper part 14 and a stop surface 108 oriented perpendicular to the guide surface 106 in the exemplary embodiment shown. The guide surface 106 is located on a Housing upper part 14 facing away from outside 110 of a first guard section 112, which adjoins the lower end portion 30 of the pistol grip 16. A second protective bow section 114 extends from the first protective bow section 112 to the front housing region 32 of the housing upper part 14.

The abutment surface 108 is arranged on a support leg 116, which protrudes from the lower end region 30 of the pistol grip 16 in the direction away from the upper housing part 14 downward. The support leg 116 and the stopper surface 08 are positioned between the guide surface 106 and the hose fitting 58. The support leg 116 reduces the risk that cleaning fluid may pass from the hose fitting 58 to the coupling 104.

The support leg 116 has a plurality of reinforcing ribs 118, which give it a high mechanical load capacity, so that the pressure cleaning device 10 can be supported via the support leg 116 on a support surface.

If the battery 102 is to be separated from the coupling device 104, then it can be displaced forward along the guide surface 106 in the direction away from the stop surface 108 and subsequently separated from the coupling device 104. If the battery 02 is to be connected to the coupling device 104, then it can be displaced back along the guide surface 106 in the direction of the abutment surface 108 until it comes to bear against the abutment surface 108 with an end face 120. The stop surface 108 thus defines a position of use of the battery 102. In the position of use, the battery 102 is connected to the electric motor 38 via known electrical and therefore not shown in the drawing to achieve a better overview electrical connection lines. In the connecting lines, the switching element 100 is connected. By the above-described operation of the control element 90, the electrical connection between the battery 102 and the electric motor 38 can optionally be made and interrupted. To lock the battery 102 in the position of use, the pressure cleaning device 10 has a locking member 122 arranged in the first protective bow section 112, which is configured as a rocking lever 124 in the illustrated embodiment. The rocker arm 124 is mounted pivotably about a rocker shaft 126 in the first protective bow section 112. A first lever arm 128 of the rocker arm 124 carries at its free end a locking member in the form of a latching hook 130, which cooperates with an associated latching receptacle of the battery 102 in the sense of a latching connection. A second lever arm 132 of the rocker arm 124 forms with its free end a force receiving element 134, which is acted upon by a second return spring 136 with a resilient restoring force under the action of the rocker arm 124 assumes its locking position shown in Figure 2.

Adjacent to the rocker arm 124, a release member 138 is movably supported on the second guard section 114. In the illustrated embodiment, the release member 138 is formed as a sliding element 140 which is slidably mounted on the second guard bracket portion 114. The sliding element 140 can be pressed by the user against the action of the second return spring 136 against the force receiving element 134, so that the rocker arm 124 is pivoted from its locking position into a release position in which the latching hook 130 releases the associated recess of the battery 102, so that the Battery 102 along the guide surface 106 can be moved to release them from the coupling device 104.

In order to avoid that the control element 90 is actuated unintentionally, the control element 90 can be locked in its rest position. For this purpose, the pressure cleaning device 10, a locking member 142 which is configured in the illustrated embodiment as a sliding bolt 144 which passes through the pistol grip 16 in the region between the first line section 68 and the control lever 92. The Schiebebolzenl44 has with respect to its longitudinal direction in the middle a recess 146 and the control lever 92, the recess 146 facing a rib-like projection 148 on. In the blocking position of the sliding bolt 144 shown in Figure 4, the recess 146 is arranged offset to the projection 148, so that the projection 148 on the sliding bolt 144 comes to rest and therefore the control lever 92 can not be pivoted from its rest position to its operating position.

In the release position of the sliding bolt 144 shown in FIG. 5, the recess 146 is arranged in alignment with the projection 148 so that the projection 148 can dip into the recess 146. This allows unimpeded movement of the control lever 92 from its rest position to its operating position.

On the sliding bolt 144, a latching lug 150 is arranged, which engages in the release position and in the blocking position in each case in a latching recess 152, 154 and thereby prevents unintentional movement of the sliding bolt 144.

Claims

PATENT APPLICATIONS

1. Hand-guided pressure-cleaning device (10) for dispensing a cleaning liquid, comprising a housing (12) having a housing upper part (14) and one of a bottom (26) of the housing upper part (14) projecting pistol grip (16), wherein in the upper housing part (14 ) one

Electric motor (38) and a driven by this pump (42) having a pump inlet (44) and a pump outlet (46) are arranged and the pistol grip (16) at a distance from the housing upper part (14) arranged lower end region (30) at connecting a coupling device (104) to which a rechargeable battery (102) is releasably retained, and wherein the pressure cleaning device (10) comprises a hose fitting (58) in fluid communication with the pump inlet (44) via an input line (52) characterized in that the hose connecting part (58) is arranged at the lower end region (30) of the pistol grip (16) and at least a first line section (68) of the input line (52) is arranged in the pistol grip (16), and in that the coupling device ( 104) a the upper housing part (14) facing away from the guide surface (106) and between the guide surface (106) and the hose connector (58) and arranged in the hint l to the guide surface (106) aligned stop surface (108), wherein the battery (102) by sliding along the guide surface (106) in the direction of the stop surface (108) connectable to the coupling device (104) and to the

Stop surface (108) can be applied and by displacement along the guide surface (106) in the stop surface (108) facing away from the coupling device (104) is releasable.

2. Hand-guided pressure cleaning device according to claim 1, characterized in that the stop surface (108) is aligned perpendicular to the guide surface (106).

3. Hand-guided pressure cleaning device according to claim 1 or 2, characterized in that the stop surface (108) is arranged on a support foot (116) which projects from the lower end region (30) of the pistol grip (16).

4. Hand-guided pressure cleaning device according to one of the preceding claims, characterized in that the pressure cleaning device (10) has a protective bracket (18) extending from the lower end portion (30) of the pistol grip (16) to the upper housing part (14) and together with the Housing upper part (14) and the pistol grip (16) surrounds a handle opening (36).

5. Hand-held pressure cleaning device according to claim 4, characterized in that the protective bar (18) has a first protective bar section (112) and a second protective bar section (114), wherein the first protective bar section (112) adjoins the lower end region (30) of the pistol grip (30). 16) and on its upper side facing away from the upper housing part (14) has the guide surface (106), and wherein the second protective bar section (114) extends from the first protective bar section (112) to the upper housing part (14).

6. Hand-held pressure cleaning device according to claim 5, characterized in that in the first protective bow portion (112) is arranged between a locking position and a release position movable locking member for locking the battery (102) to the coupling device (104).

7. Hand-guided pressure cleaning device according to claim 6, characterized in that the locking member (122) is mechanically coupled to a manually operable release member (138).

8. Hand-held pressure cleaning device according to claim 7, characterized in that the release member (138) on the second guard bracket portion (114) is movably held.

9. Hand-guided pressure cleaning device according to claim 8, characterized in that the release member is designed as a sliding element (140), which is slidably mounted on the second guard bracket portion (114).

10. Hand-guided pressure cleaning device according to claim 7, 8 or 9, characterized in that the locking member (122) is designed as a rocker arm (124) which is movable by actuating the release member (138) against a resilient restoring force from a locking position into a release position.

11. Hand-guided pressure cleaning device according to one of the preceding claims, characterized in that on the pistol grip (16) a manually operable control element (90) is arranged to control the delivery of the cleaning liquid.

12. Hand-guided pressure cleaning device according to claim 11, characterized in that the electric motor (38) by pressing the control (90) is switched on and off.

13. Hand-guided pressure cleaning device according to claim 12, characterized in that the control element (90) cooperates with an electrical switching element (100).

14. Hand-guided pressure cleaning device according to one of claims 11 to 13, characterized in that by means of the control (90), the flow connection between the hose connector (58) and the pump inlet (44) is selectively releasable and interruptible.

15. Hand-guided pressure cleaning device according to claim 14, characterized in that in the input line (52) a valve is arranged, which has a closing body (88), which in a closed position rests tightly against a valve seat (72) and by actuating the control (90 ) is movable in an open position spaced from the valve seat (72).

16. Hand-guided pressure cleaning device according to claim 15, characterized in that the control element (90) via a plunger (76) with the closing body (88) is coupled.

17. Hand-held pressure cleaning device according to claim 16, characterized in that the plunger (76) passes through a in the input line (52) opening through passage (74), wherein it is surrounded by a sealing element (78) in the passageway (74).

18. Hand-held pressure cleaning device according to claim 16 or 17, characterized in that the plunger (76) from the control element (90) against a resilient restoring force in the direction of the closing body (88) is movable.

19. Hand-guided pressure cleaning device according to one of claims 15 to 18, characterized in that the closing body (88) in the input line (52) by means of guide elements (89, 91, 93, 95) is guided linearly.

20. Hand-held pressure cleaning device according to claim 19, characterized in that the closing body has at least one first guide element (89, 91) which is in engagement with a in the input line (52) arranged second guide element (93, 95).

21. Hand-operated pressure-cleaning device according to one of claims 11 to 20, characterized in that the control element (90) has a control lever (92), which protrudes from the pistol grip (16) and about a pivot axis (94) is pivotable.

22. Hand-guided pressure cleaning device according to one of claims 11 to 21, characterized in that the control element (90) is movable between a rest position and an actuating position and can be locked in the rest position.

23. Hand-held pressure-cleaning device according to claim 22, characterized in that the pressure-cleaning device (10) has a blocking position that can be moved back and forth between a locking position and a blocking element (142) for locking the control element (90).

24. Hand-guided pressure cleaning device according to claim 23, characterized in that the blocking member (142) passes through the pistol grip (16) and is manually displaceable back and forth between the blocking position and the release position.

25. Hand-guided pressure cleaning device according to claim 23 or 24, characterized in that the blocking member (142) has a recess (146) which is offset in the blocking position to a projection (148) of the control element (90) and which is aligned in the release position to the projection (148) of the control element (90) is arranged.

26. Hand-guided pressure cleaning device according to one of the preceding claims, characterized in that the input line (52) has a second line section (70) which is arranged in the upper housing part (14).

27. Hand-held pressure cleaning device according to claim 26, characterized in that the second line section (70) is aligned parallel to a common longitudinal axis of the electric motor (38) and the pump (42).