MXPA98006061A - Supplier bo - Google Patents

Abstract

The present invention relates to a pump jet adapted to be mounted in a container, characterized in that it comprises: a. a gradual tubular body, b. a graduated tubular piston having a wall and extending gradually, reciprocably or alternatively within the gradual tubular body to define a pumping chamber, the piston is formed with an opening means in the wall communicating between the inner part of the tubular piston and pumping chamber, c. A shank or shank having an upper portion, and a sealing head positioned on the gradual tubular piston and adapted to occupy a first position that closes the opening means above the head and exposes the opening means below the head to define an entry path from the internal part of the piston, and a second position that closes the opening means below the head and exposes the opening means above the head to define an upward discharge path between the head. upper portion of the stem and piston, d. a spring placed compressively between the shank and the body and pushing the shank or shank upward to the first position, and e. a means of loss of motion or movement lost between the stem and the piston with which the downward movement of the rod will first press the head from the first to the second position and will move the stem to the stem and the piston downward, in unison inwards of the tubul body

Description

- - PUMP SUPPLIER FIELD OF THE INVENTION This invention relates to a pump dispenser especially suitable as a dispenser for lotions and other creamy liquids. It includes a connection valve operated by an actuator and which takes the place of the usual inlet and outlet check valves.

BACKGROUND OF THE INVENTION Patent 3,627,206 by Michel Boris discloses a pump having a central rod with separate radial passages communicating respectively with axial discharge and inlet openings and an annular piston which centrally receives the rod in a sliding relationship. The piston, which is operated in a pumping chamber, is provided with a passage to the chamber from an opening in front of the rod, which aligns alternately with the discharge or inlet passage. A motion loss arrangement between the piston and the rod controls the alternate alignments. The Boris patent requires accurate radial and vertical alignment of the rod and piston to ensure REF: 28072 that the passage in the rod and the piston are aligned. In addition, the volume of pumping is limited by the size of the passages. In the patent of Cater 5,284,276 issued on February 8, 1994, it describes a meritorious pump for lotions or the like that includes a tubular main piston having an outward flange and a seal and extending inside a progressive or stepped cylindrical body for define a pumping chamber. The piston has an axial, upward, tubular, unitary outlet provided with a valve seat at its lower end. Adjacent to and below the valve seat is the piston wall. A spigot / spigot actuator, mounted as a rigid, fixed, single unit, extends down centrally through the tubular upstream outlet and the seat. The lower end of the pin is formed with a valve head inside the piston in a sealing coupling with the wall of the piston and adapted to lift the seat in the valve seat. There is a space of loss of movement between the spigot / pin actuator and the piston so that after the depression of the actuator, the pin falls with respect to the piston and the head of the valve separates from the seat and moves down the opening on the piston wall before the piston starts moving down. Continuing the same downward stroke, the actuator pressurizes the liquid in the pump chamber and forces it out of the opening through the valve seat and out of the actuator spigot. A spring presses the spigot / spigot actuator for the return stroke. The pin first rises within the piston, again opening the loss of motion space or forcing the head towards the seat in the valve seat and opening the opening in the piston wall. As the head engages a flange on the piston, the upward force of the spring then raises the piston. As the piston rises, it forms a vacuum in the pumping chamber, pulling the lotion up through an inverted tube to the lower end of the pump body, into the piston and through the inlet opening of the piston towards the piston. camera ready for the next race down.

BRIEF DESCRIPTION OF THE INVENTION Under the present improvement of the Cater pump, the valve seat described above is replaced by a second opening in the wall of the piston above the opening described. The head of the spike is in the form of a bi-directional, peripheral flap type seal, which moves - from a first position where the upper opening is covered and the lower opening is uncovered to a second position where the lower opening it is covered and the upper opening is uncovered. Increased benefits Having both openings with the same diameter in the piston wall, manufacturing is simplified and there are fewer leaks. The head can have a peripheral seal of a single diameter. The improved arrangement better accommodates dimensional variations and does not require such precise molding. Also, fin-type seals are flexible and allow dimensional variations. Plugging the valve with a vertical beveled seating surface is not a concern. In addition, the resulting structure allows separate openings for the inlet of the pump chamber and the discharge flow. By having separate openings for the opposite flows, in and out of the pumping chamber, the trajectories of the flows are simplified and the efficiency of the pumping action is improved in this application of a relatively short stroke. In a preferred embodiment, the two openings may be in the form of a single elongated window, the upper portion of which, when exposed, constitutes the discharge and the lower portion, when exposed, constitutes the entrance to the pumping chamber . In the version of the windows, the fin-type seals do not find the transversal edges of the openings that can cause wear. These two arrangements - the two separate openings and the elongated window - are considered equivalent.

BRIEF DESCRIPTION OF THE DRAWINGS Additional objects and features of the invention will be clear to those skilled in the art from a review of the following specification and drawings, all of which present a non-limiting form of the invention. In the drawings: Figure 1 is a sectional center line view of one embodiment of the pump of the invention showing the actuator / spigot assembly in the first position with the arrows showing the flow in the up stroke mode of the actuator; Figure 2 is an exploded, enlarged elevation showing the main piston rotated slightly about its axis from the position of Figure 1 and the spike in section; Figure 3 is a view of the sectional center line of the pump of Figure 1 with the actuator / spike assembly in the second position with the arrows showing the flow in the down stroke mode; Figure 4 is an enlarged portion of Figure 3; Figure 5 is a modified form of the pump which also shows the embodiment of the invention. It is in position of the parts, comparable to Figure 1. Figure 6 is a sectional view of a variation of the spigot and piston in which the printed form of the same reference numbers are used to designate the corresponding parts, and Figure 7 is an enlarged portion of Figure 6 as shown with an alternating position of the upward fin seal shown in dashed lines.

DESCRIPTION OF THE PREFERRED MODALITY In Figure 1 there is shown a dispensing pump which encompasses the invention and which is generally designated as 10. It comprises a closure 12 and an actuator 14 that extends downwards into the upper part of the closure 12 when the actuator 14 is pressed down. The actuator includes the discharge spout 16. The closure 12 comprises a shell 18 of general cylindrical shape having an inlet therefrom which places between its ends an annular, graduated rim 20. Beneath the junction of the flange with the cylindrical cover 18, the cover is formed internally with threads 22 adapted to a screw in coupling threads on the termination of a container (not shown). An annular retainer 24 is fitted against the lower portion of the annular flange 20 and comprises corresponding coupling stages which are pressed against the lower surface of the annular flange. At its lower end, the retainer comprises a horizontal seal ring 26 against which the upper part of the termination is adjusted, preferably with a coating therebetween (not shown). The detent further comprises a lip 28 downward and a peripheral recess 30 outwardly opposite the lip 28. The upper end of the annular retainer 24 is formed with bevel or taper 32. A body 34 of the graduated or progressive pump comprises a cylindrical wall 36 upper having a lip 38 outward which fits within the recess 30 in the detent. At the lower end of the upper cylindrical wall 36 is an annular step 40 inward to the lower end of which a lower cylindrical wall 42 is unitarily connected. At its lower end, the lower cylindrical wall 42 is formed with a reduced plug 44 which receives the inverted tube 46 which gradually extends in a fixed manner, upwards, therein. Within the cylindrical wall 42 a central spring assembly 48 is supported on three radial legs 50 molded integrally with the wall 42 and allowing passage of the flow through the holes 51 therebetween. A main piston 52 is reciprocably or reciprocably positioned within the retainer 32 and comprises an upstream tubular outlet portion 54 which is integral at its lower end with a tubular, lower portion 56. At the lower end of the upper portion 54 there are steps or graduations outwardly of the annular flange of the integral piston and the seal 58 extending downwardly to engage with the inner surface of the upper cylindrical wall 36. The distal edge 58a of the piston seal is thickened and sealingly engaged against the interior of the upper cylindrical wall. Separately below seal 58 of the piston, the lower tubular portion 56 of the main piston is formed with elongated windows 60. Preferably the windows are evenly spaced around the wall of the lower tubular portion 56. The lower end of the main piston 52 is formed with an outward sealing shoulder 62 which engages the interior of the lower cylindrical wall 42 in a sealing coupling. An annular retainer 63 facing down (Figure 4) extends into the piston 52 for a short distance above the windows 60. Thus, the main piston 52 and the body 34 are, in effect, a gradual piston extending from Gradually inward from a graduated body. They define a pumping chamber 64 between them. An inlet chamber 66 (Figure 1) is defined by the lower cylindrical wall 42 and the lower tubular portion 56. The actuator 14 comprises an upper wall 68 and a cylindrical lateral wall 70. The side wall 70, as shown, is formed with an annular hook 72 at its lower end which, in assembly, is pressed toward the lip 74 inwardly around the upper end of the cylindrical cover 18 of the closure 12 to retain the actuator The assortment spigot 16 is an integrally molded tube radially extending from the upper wall 68 and joining with an axial, tubular, unitary elevator 76 downwards. The upper wall is formed with an annular, downward, abbreviated ring 77 which meets the chamfer 32 in the retainer. As shown in Figure 2, the interior of the tubular lifter 76 is formed with three inwardly facing ribs 78, equally spaced with spaces 79 therebetween. The lower end of the tubular lifter 76 is formed (Figure 4) with a splice or support 80 tapered downward, which preferably corresponds to the angle of the support 55 tapered upwardly of the inner surface of the main piston. As shown in Figure 1, these chamfers are vertically separated from each other in the first position to constitute a relationship of lost motion or lost motion. The pin 84 is the valve element of the assembly (Figure 4). It comprises an elongated upper end 86 which is received within the axial interior of the riser 76 and is fixedly engaged with the flanges 78 and secured against any movement with respect thereto by means of steep detents 88. At the intermediate of its ends, the spigot 84 is outwardly enlarged to provide an annular inclination flange 90 which fits against a complementary flange on the projections 78 on the lower end of the tubular axial lifter, thus ensuring that the spigot does not will collide inside the elevator 76 when the actuator stops pressing. Separated downwardly from the flange 90 and above the lower end 94 of the spigot is an outwardly facing head 95 having a fin-shaped, bi-directional, annular seal 96. This seal is connected by a thin peripheral network 97 to the rest of the pin 84. A spiral spring 98 has its upper end which receives the lower end 94 of the pin and its lower end which receives the central spring assembly 48. This is a compression spring in the present environment and serves to push pin 84 upwards every time. Now the operation of the pump will be explained. When it is desired to fill the lotion or other liquid from the container (not shown), the actuator 14, usually in the first position axially with respect to the piston shown in Figure 1, is pressed. In this process, the actuator 14 rigidly joined together and the spigot 84 together as a unit are manually pressed downwardly. Prior to any downward movement of the main piston 52, there is a sliding movement of the elevator 76 from the downward actuator towards the main piston 52 to the downwardly tapered detent 80 in the lower part of the elevator 76 which approaches and is Coupling with the taper retainer or support 55, up, inside the main piston. By doing this, the space of motion lost between the actuator and the piston, as indicated in Figure 1, is eliminated for the remainder of the run down. This elimination of the motion loss space has the effect of moving the bi-directional fin type seal 96 downwardly along the windows 60 of the piston to a second position to open a discharge opening 100 above the seal (FIG. , 4) . The continued downward movement of the main piston 52 as the actuator is pushed down, pressurizes the lotion into the pumping chamber 64, causing it to escape upwardly through the opening 100 into the surrounding space of the spike and then downward to through the spaces 79 between the flanges 78 in and out of the spout 16 to define a discharge path. The end of the lower travel limit of the main piston 52 is determined when the lower end 94 of the pin 84 engages the central spring assembly 48 and the ring 77 in the actuator 14, engages with the chamfer 32. In or before that the piston runs outward, as described above, the user will release the actuator, allowing the spring 98 to move the spigot / pin actuator 84 upwards. This elevation of the spigot 84 causes the bi-directional fin-type seal 96 to move upward with respect to the piston and the elongated windows 60, closing the opening 100. Simultaneously a lower opening 102 (Figure 1) opens according to FIG. Seal 96 is exposed to it. The seal 96 engages with the retainer 63 (Figure 4). This again opens the lost movement space (Figure 1). With the seal 96 driving up against the retainer 63, the movement continues as the piston 52 rises and expands the pump chamber 64. The vacuum thus created draws the upward flow of the inverted tube 46 into the inlet chamber 64 and finally through the opening 102 to define an inlet path and into the pump chamber 64. When the flange or fins of the main piston and the seal 58 move upward and engage with the lower end of the lip 28 downwardly (Figure 1), the upper limit of travel is reached. In this first position, with chamber 64 filled with the lotion, the pump is ready for the next pressure stroke. If the chamber 64 is emptied at the start of the process, two or three strokes of the actuator may be necessary to fill it. This is a common feature of simple pumps of this type. In the downward and upward movement of the seal 96 with respect to the window 60, the seal can be seen as a supply valve. Figure 5 shows a first position of a modified form of the pump in which the window 60 shown in Figure 3 is replaced by an aperture discharge assembly 104 and an aperture entry assembly 106. The operation of the The embodiment of Figure 4 is similar to the operation of the embodiment of Figure 1, except that instead of the upper portion of the windows 60 that are opened during the discharge stroke, the aperture discharge assembly 104 is opened. Similarly, during the entry stroke, instead of the lower portion of the windows 60 that open, the lower assembly 106 of the openings 104 opens. In Figures 6 and 7, a variation of the embodiment of Figure 1 , the seal 96 'in the first position not only covers the outlet opening 100' (Figure 3) but also has its distant upper edge 96a 'which engages the annular retainer 63' in a settling relationship (Figure 6, 7). The annular distal edge couples the horizontal annular seat 63 'in a valve conformation that deviates from the discharge path, double ensuring that the discharge path is closed. As a result, during the upward stroke, the pumping chamber, in the enlargement, is not susceptible to leakage from the discharge path through the opening 100 'to the chamber 64' and the extraction of the liquid up the inverted tube and entry 66 is deficient. In Figures 67, the retainer 63 'having a lip 63a' annular downwards around its inner edge with an outwardly inclined frusto-conical surface 63b is shown, which serves to centralize the annular edge 96a 'away from the fin upwards of the seal 96 as the shank or spike approaches its first position. It also tightens the edge 96a 'of the annular flap outwards, further ensuring that the opening 100' is blocked.

- The upward flange of the seal 96 'can be made of a diameter slightly smaller than the inner diameter of the lower portion 56', resting on the outwardly enlarged fin in the manner described to close the fin 96 radially outwardly in the opening 100 as shown in dashed lines in Figure 7. The molded outer diameter of the upper fin 96 being smaller than the inner diameter of the lower tubular portion 56 'which ensures that the fin will remain on the upper edge of the opening 100 'without getting stuck. The embodiments of the invention as described herein, simplify the structure of the opening and reduce the propensity of dripping and other erroneous performances. Also, by providing separate inputs and discharge from the pump chamber, the mode improves pumping efficiency. Additional variations in the invention are possible. Thus, while the invention has been shown only in the limited modalities, it is not limited in scope but the scope is defined by the language of the following claims which may be extended by an extension of the right to exclude others from manufacturing, use or sell the invention as appropriate under the doctrine of equivalents.

It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates.

Having described the invention as above, property is claimed as contained in the following:

Claims (16)

1. A pump jet adapted to be mounted in a container, characterized in that it comprises: a. a gradual tubular body, b. a graduated tubular piston having a wall and extending gradually, reciprocably or alternatively within the gradual tubular body to define a pumping chamber, the piston is formed with an opening means in the wall communicating between the inner part of the tubular piston and the pumping chamber, c. a shank or spigot than an upper portion, and a sealing head positioned on the gradual tubular piston and adapted to occupy a first position that closes the opening means above the head and exposes the opening means below the head to define an entry path from the internal part of the piston, and a second position that closes the opening means below the head 1 and exposes the opening means above the head to define an upward discharge path between the upper portion of the rod and the piston, d. a spring placed compressively between the rod and the body and that pushes the rod or spike upwards towards the first position, and - - e. a means of loss of movement or movement lost between the rod and the piston with which the downward movement of the rod will first press the head from the first to the second position and will move the rod or spigot and the piston downwards, in unison inside the tubular body.

2. A pump jet according to claim 1, characterized in that the opening means comprises an elongated window.

3. A pump jet according to claim 1, characterized in that the opening means comprises separate inlet and discharge openings.

4. A pump jet according to claim 1, characterized in that the sealing head comprises a bi-directional flap seal.

5. A pump jet according to claim 1, characterized in that it includes an inward detent in the piston to limit the upward travel of the head to the first position.

- - A pump jet according to claim 5, characterized in that the sealing head comprises a bi-directional fin seal defined by an inwardly annular fin seal having an upwardly distant edge and the annular seal. and the distant edge sits on the annular retainer.

7. A pump jet according to claim 6, characterized in that the annular retainer has an inner edge and is formed on the inner edge with a lip facing down, the lip has a tapered outward surface and as the seal approaches the first position, the distant edge tapers or presses outwardly on the surface, tapered to engage the lower tubular portion and cover the discharge opening.

8. A pump jet characterized in that it comprises: a. a gradual cylindrical body having an integral cylindrical upper wall and a lower cylindrical wall, the diameter of the cylindrical upper wall is greater than the diameter of the lower cylindrical wall, the cylindrical upper wall is inwardly graduated at its communicating lower end with the lower cylindrical wall, - - b. a gradual cylindrical piston extending gradually in the body, the piston comprises an upper tubular portion having an upwardly supporting or retaining surface and a lower tubular portion that is connected, a piston flange and the seal extending outwardly between the portions and sealingly couple around the cylindrical wall of the body, the lower tubular portion which is sealingly engaged around the lower cylindrical wall, the cylindrical gradual body and the gradual cylindrical piston define a pumping chamber positioned between the cylindrical wall upper and lower tubular portion, the lower tubular portion and the lower cylindrical wall define an entry path, the lower tubular portion is formed with an upper discharge opening and a lower entry opening and an inward seal, above the upper discharge opening, c . a vertical shank or centrally located shank of the upper tubular portion of the piston and spaced therefrom defines a vertical discharge path therebetween, the shank having an enlarged head at its lower end which is in sealing engagement slidable about the tubular portion lower of the piston, the rod is adapted to assume a first position in which it covers the discharge opening and exposes the entry opening, and a second position in which it covers the entry opening and exposes the discharge opening, d. an actuator secured to the shank or spigot and having a spout and a vertical, tubular lifting portion that is gradually engaged to the upper tubular portion of the piston and continuing the path of discharge to the spout or nozzle, the actuator has a retaining surface or support downwardly in vertical alignment with the detent surface or support upwardly on the piston, retainer or bearing surfaces are separated when the rod or spike is in the first position, and e. a spring that pushes the rod upwards in engagement with the detent inwards in the piston where the rod is in the first position.

9. A pump jet according to claim 8, characterized in that the discharge opening and the inlet opening of the lower tubular portion of the piston are enlarged in directions with each other to form an elongated window.

10. A pump jet according to claim 8, characterized in that the sealing head comprises a bi-directional flap seal defined by an annular fin-like seal inward having an upwardly distant edge and the retainer is annular and the distant edge sits on the annular retainer.

11. A pump jet according to claim 10, characterized in that the annular retainer has an inner edge and is formed on the inner edge with a lip facing down, the lip having a tapered outward surface and as the seal approaches the first position, the distal edge is tightened or compressed by the tapered outward surface to engage the lower tubular portion and cover the discharge opening.

12. In a pump dispenser comprising: a. a gradual cylindrical body; b. a gradual piston extending gradually in the body, the piston has an upwardly tubular outlet portion having an upwardly sealing surface and a connecting lower tubular portion having a wall, the gradual cylindrical body and the gradual cylindrical piston define a pumping chamber, the inner tubular portion is formed with an upper discharge opening and a lower entry opening and a retainer inwardly above the upper discharge opening, c. a vertical shank or pin centrally positioned to the upper tubular portion of the piston and spaced apart therefrom to define a vertical discharge path therebetween, the shank having an enlarged head at its lower end which is in sealing engagement slidable about the tubular portion lower of the piston, the rod is adapted to assume a first position in which it engages with the retainer and covers the discharge opening and exposes the inlet opening, and a second position in which it covers the inlet opening and exposes the opening of discharge, d. an actuator secured to the rod and having a tubular lifter positioned on the piston and having a retainer surface downwardly in vertical alignment with the detent surface or support upwardly on the piston, the retainer or support surfaces being separated when the rod is in the first position, and e. a spring that pushes the rod upwards in engagement with the detent or stop inwards in the piston where the rod is in the first position, where the improvement is characterized in that the inlet and discharge openings are in the wall of the piston. lower tubular portion of the piston.

13. A pump jet according to claim 9, characterized in that the upper discharge opening and the inlet opening of the lower tubular portion of the piston are enlarged in directions to each other to form an elongated window.

14. A pump jet according to claim 12, characterized in that the sealing head comprises a bi-directional fin seal, defined by an annular, inwardly annular seal having an upwardly distant edge and the annular seal and the annular seal. distant edge sits on the ring stop or stop.

15. a pump jet according to claim 14, characterized in that the annular retainer or stopper has an inner edge and is formed on the inner edge with a lip facing down, the lip has an outwardly tapered surface and as the seal approaches at the first position, the distal edge is pressed or compressed by the surface outward, tapered to engage the lower tubular portion and cover the discharge opening.

16. A method for supplying liquids, characterized in that it comprises: a. provide a piston that has a wall-shaped extension, tubular, central, the extension is surrounded by an annular pumping chamber, the extension has a uniform inner diameter and has discharging and entrance openings longitudinally separated in the wall, b. providing a rod or shank having a sealing head, seated sealingly around the wall of the piston, adapted to the head to assume a first position in relation to the piston in which the sealing head covers the discharge opening and exposes the inlet opening in a second position in which the sealing head exposes the discharge opening and covers the inlet opening, c. cause reciprocating or reciprocating movement of the piston, and d. moving the sealing head between the first and second positions to cause the liquid to pass intermittently towards the inlet opening and exit through the discharge opening as the piston moves alternately.