WO2007122087A1

WO2007122087A1 - Dispenser for discharging liquid to pasty materials

Info

Publication number: WO2007122087A1
Application number: PCT/EP2007/053331
Authority: WO
Inventors: Günter Auer
Original assignee: Megaplast Gmbh & Co. Kg
Priority date: 2006-04-21
Filing date: 2007-04-04
Publication date: 2007-11-01
Also published as: DE202007004405U1

Abstract

The application relates to a dispenser (1) for discharging liquid to pasty materials. Said dispenser comprises a pump head (29) and pump chambers (11) which are embodied therein and are provided with a pump chamber wall (12), each pump chamber having an inlet valve (13) and a discharge valve (35). According to the invention, a pump piston (22) is allocated to each pump chamber (11) provided with a rigid pump chamber wall (12) and is arranged in said pump chamber.

Description

Dispenser for dispensing liquid to pasty masses

The invention relates to a dispenser for dispensing liquid to pasty masses with a pump head and formed therein, a pumping chamber having pumping chambers, each having an inlet and an outlet valve.

Dispensers of the type in question are known in the art; Thus, for example, from EP 0 520 315 B1. This known dispenser has two pump chambers formed with a flexible wall, wherein the mass contained in the pump chamber is expelled by compressing the pump chamber wall in the axial direction.

The invention is based on the object, in particular a dispenser as initially assumed to develop advantageous.

This object is achieved first and foremost in a dispenser with the features of claim 1, wherein it is pointed out that each pump chamber formed with a rigid pump chamber wall is associated with a pump piston received therein. According to such a configuration, in particular, an improved dispensing capability is achieved in a double-pump dispenser. Regardless of the compression of the pump chamber wall can be caused by driving down the respective pump piston emptying of the respective pumping chamber. The Synchronentlee- tion of the pumping chambers is not disturbed by different shape work of the pumping chamber walls. In addition, the rigid design of the pumping chamber walls together with the pumping piston accommodated therein can advantageously be used for the total centering and guidance of the dispenser parts that are movable relative to one another. Preferably, the chamber walls each have a cylindrical shape with a circular cross-section, and accordingly the physical shape or the cross-section of the pump piston is adapted. As a result of the rigid or smooth formation of the pumping chamber walls, the masses are practically "scraped off" from the walls of the pumping chambers when the pump head is actuated, so that ultimately an improved emptying of the pumping chambers can be achieved.

On the foot side, the pumping chambers extend via funnel-like tapers into a cylinder-like inlet section. In the funnel-like taper, the intake valves are preferably accommodated. On the upper side, the pumping chambers have correspondingly preferred, funnel-like widening outlet sections in which the outlet valves are arranged. Preferably, the pumping chambers are formed by an integrally molded adapter part, on which the pump head is held displaceably.

Furthermore, features are described which preferably have in combination with the features of claim 1 meaning, but also in principle with only some features of claim 1 or alone may have meaning.

Thus, it proves to be advantageous that the pumping pistons are connected to one another by engaging the pumping chamber walls and that the pumping pistons are preferably formed integrally with one another. In this respect, the pumping pistons are advantageously formed by a single, approximately cross-sectionally shaped, component. The loading of both pump pistons can be done by applying this (a) component. The connection of the pump pistons with each other is also favorable montagetechnisch. If the one-piece production is not selected, the pump pistons can be latched to this component, for example. By doing so also one-piece Mit- Formations of the pump piston is also achieved beyond the reduction of the individual parts as such, favorable simplification of the building structure. The overall stability is favorably promoted. The pumping pistons or the pumping chambers are preferably arranged on both sides of the dispenser axis, more preferably mirror-symmetrically.

In the outer housing of the dispenser, which preferably has an elliptical plan, two preferably identically formed storage containers are fixedly arranged, each pumping piston or each pumping chamber being assigned a storage container. Each of these storage containers contains a bulk-filled storage bag filled with bulk material for emptying. To fix the storage bag is provided that they are connected in the storage containers each along a line with the bottom of the storage containers. An everting of the storage bag is prevented. With regard to a possible embodiment of the stock bag is on the German

Utility Model 205005014895 referenced. The content of this document is hereby incorporated in full into the disclosure of the present invention, also for the purpose of including features of this utility model in claims of the present invention.

Corresponding to the elliptical base contour of the outer housing, the pump head or the dispenser has an elliptical base contour as a whole. So that the pump piston or the pump head shift back to the starting position after the pumping operation, a return spring is provided in a conventional manner. It is preferred in that the pumping chambers are surrounded by a common, single return spring. It is such a relatively large, and also strong, return spring created, which is also to include favorable mounting technology. One spring must be made stronger than one of two individual springs. The relatively large distance to the Center, which is realized in total by these springs due to the environment of the pumping chambers, is also technically advantageous (lever arm) advantageous.

The return spring formed from a plastic material is preferably formed as a bellows suitably manufactured in the plastic injection molding process and has a base contour which is adapted to the oval donor base contour. This production allows a favorable adaptation of the geometry to the given conditions. It can also be provided that both the dispenser and the return spring have a circular basic contour. Alternatively, the pumping pistons can each be surrounded by a restoring spring, which return springs can, for example, be designed as steel springs with a circular cross-section.

The measure proves to be that the intake valves are each preloaded in their closed position. The formed as separate parts and consisting of an elastically resilient plastic Einlas s valves are supported by support on a housing part, preferably the pumping chamber, which in turn is achieved in turn by latching in their valve body seat under elastic deformation, whereby said bias in detail is reached. They sit in the funnel-like inlet openings of the pumping chambers with elastic pre-deformation. Upon actuation, i. In this case, a negative pressure in the pumping chamber, the deformation is increased in the course of lifting the intake valves, whereby mass is sucked from the storage container.

On the housing part or the pumping chamber walls annular beads or other Rastierungs- projections are preferably provided in the circumferential direction of the inlet openings, which respectively support the inlet valves in the direction of the respective pumping chambers. If the pumphead is moved back to its original position by the return spring, the intake valves Ie by the negative pressure generated so to speak, "raised", so that consequently the stored in the storage bags masses are sucked into the respective pumping chambers for filling the same. In detail, as explained in more detail below, such an inlet valve has two pot-like areas with each other, with a larger diameter at the top and a smaller diameter at the bottom, which merge into one another via a cone wall. As in the course of Nachsaugens of mass in the pumping chamber, only the lower pot wall is lifted from the valve seat and is thus flowed around by mass, it is further preferred to form one or more mass passage openings above this sealing surface in the pot or the cone region to the extent then to facilitate the passage of the mass through the inlet valve.

The exhaust valves, which are likewise each formed from an elastically resilient plastic, are each prestressed in their closed position. The extent preferably constructed identically to the inlet valves outlet valves are in this case in particular biased by the fact that they are supported with the frontal top edge of the pot on the ceiling of a pump head and are pressed into the closed position.

More preferably, the valve seats for the exhaust valves are formed directly in the provided with a passage opening for the mass pump piston itself. In this case, the outlet valves enter with a section in each case in the flow channels of the pump piston.

With regard to a desired and preferably realized uniform design of the outlet valves and the inlet valves, the outlet valves, in this case then identical in shape to the inlet valves, can also have one or more mass flow openings in the circumferential direction. When donor inwardly executed stroke of the pump head are respectively the Due to the generated overpressure, outlet valves are "raised" due to their elasticity, so that the masses stored in the pumping chambers are conveyed to the discharge opening as a result. This is about the same dosage. Furthermore, it is provided that the inlet valves are aligned in front of one another in the same plane as the pump chambers. As a result of this arrangement, which is in the same plane, the funnel-like inlet openings of the pumping chambers, which are responsible for the valve seat, are also of the same height in terms of height. In view of this, it is further advantageous that the outlet valves are also aligned with each other in the same plane aligned with the pump head. Since the exhaust valves and the intake valves are arranged in the same plane, a symmetrical configuration of the one-piece component forming the pump piston and of the pumping chambers can also be realized. Due to the already mentioned preferred identical embodiment of the valve body and the respective valve seats of the inlet and outlet valves can be formed substantially identical.

According to the invention, it is further provided that two separate discharge channels are formed in the pump head, which in an aligned transversely to the donor axis plane an acute angle of about 60 ° to 65 °, preferably 62 °, to each other, so that the output channels preferably in a common Mass output range open, with the output channels are even separated by a common Wandststeg to the output of the masses. In this respect, mixing is possible only from a separate storage container ausbringbaren masses outside the donor.

The construction of the pump piston according to the invention, the pumping chambers, the inlet / outlet valves and the identically formed storage containers, a double-pump dispenser is provided, which has a mirror-symmetrical design throughout. To that extent far the production of the dispenser according to the invention is inexpensive. In addition, the mirror-symmetrical construction increases the reliability of the entire dispenser.

In the following, the invention will be explained further with reference to the attached drawing, which, however, represents only one embodiment here. Hereby shows:

1 shows a central vertical section through the dispenser with non-actuated pump head.

2 shows the section along the line II - II in Fig. 1.

3 shows the section along the line III - III in Fig. 1.

4 shows the section along the line IV - IV in Fig. 2.

Fig. 5 is an enlarged partial section of the fiction, contemporary

Dispenser with pump head displaced inwards;

6 shows the essential components of the dispenser in an exploded view;

Fig. 7 is a greatly enlarged single view of a arranged in the dispenser valve body and

8 shows the bottom view of the valve body according to the reference VIII in FIG. 7.

1 and 2, a double-pump dispenser 1 for dispensing liquid to pasty masses M is shown and described. The dispenser 1 having an elliptical basic contour has an outer surface. housing 2, at the neck 3, an adapter part 4 is fixed by means of a corresponding latching connection 5.

The adapter part 4 has on both sides of a donor axis x integrally formed, in the inner space of the housing 2 protruding, circular formed Rastaufnahmeflansche 6 on. Both the adapter part 4 and the molded Rastaufnahmeflansche 6 are formed mirror-symmetrically, the Rastaufnahmeflansche 6 serve to secure two mirror-symmetrically positioned in the interior of the housing 2 reservoirs 7. In the identically designed storage containers 7, a largely loose inner bag 8 is arranged, in which the mass M to be dispensed is contained. The inner bags 8 may each be connected in places in the bottom area of the storage containers 7 or along a line to the bottom of the storage containers 7, so that an everting of the inner bag 8 is prevented. On the outside wall, the inner bags 8 are each attached to the inner wall of the neck areas 9 of the storage container 7.

From the adapter part 4 each inlet openings 10 having nozzles S are formed. The symmetrically shaped sockets S are each arranged centrally in the catch receiving flanges 6 and have over the neck areas 9 in the reservoir 7 and the inner bag 8. The funnel-like and symmetrical in cross section inlet openings 10 each form, as can be seen, the open bottom portion of two parallel extending pump chambers 11. The latter are each arranged on both sides of the donor axis x and parallel pumping wall 12 formed, which in turn are cylindrical and have a circular cross-section. The catch receiving flanges 6 and the sockets S, the inlet openings 10 and the pumping chamber walls 12 are part of the integrally and mirror-symmetrically manufactured adapter part 4. At the funnel-shaped bottom portion of the pumping chambers 11 are each centrally arranged, identically formed Einlas sventile 13 arranged in the form of soft valves mirror symmetry to the dispenser axis x. In the detail view of FIGS. 7 and 8, such an inlet valve 13 is shown enlarged. Here it can be seen that the inlet valve 13 has an approximately funnel-shaped longitudinal cross-section. The upper hopper pot 14 is circular in cross-section. At this crucible portion 15 vertical ribs 16 are formed, which in turn are arranged in the circumferential direction of the crucible 15 each at an angle of about 120 °, so that the inlet valve 13 over a total of three vertical ribs 16 has. At the transition region between funnel pot 14 and crucible section 15, three uniformly distributed molded through openings 17 are provided in the circumferential direction of funnel pot 14 from its wall. These passage openings 17 are, as shown in particular in FIG. 8, each associated with a vertical rib 16 and aligned symmetrically with respect to the vertical ribs 16. In addition, 14 stabilizing longitudinal ribs 18 are integrally formed on the inner wall of the hopper pot, which are distributed uniformly over the circumference of the hopper pot 14.

As a valve seat for the intake valves 13, it is provided that in each case the pumping chambers 11 have diameter-reducing annular collars 19 on their inner walls. These are arranged within the pumping chambers 11 at a distance from the funnel-shaped bottom region of the pumping chambers 11. As a result, the inlet valves 13 are secured within the pump chambers 11 in the longitudinal direction, ie in the direction of the dispenser axis x upwards. The inlet valves 13 are in sealing contact with the funnel walls 21 of the inlet openings 10 via the lower marginal edge 20 of the crucible sections 15 in the unactuated state of the dispenser 1. Above the inlet valves 13 are each mounted in the pumping chambers 11, based on the illustrations, vertically displaceable pump piston 22. Like the pumping chambers 11, the pumping pistons 22 are identical and of mirror-symmetrical design. For this purpose, it is provided that the respective pump piston 22 surrounding an axis v are formed by a carrier member 23 formed in one piece and in the manner of a bridge. While the pumping pistons 22 are each matched with their outer diameters to the inner diameter of the pumping chambers 11, the outer contour of the carrier member 23 is adapted to the elliptical basic contour of the dispenser 1. The pump pistons 22 arranged upstream of the inlet valves 13 have respective centric flow channels 24 arranged lengthwise for the mass M to be dispensed. The necessary piston surfaces 26 of the pump piston 22 partially surround the longitudinal ribs 25. Each piston surface 26 consists of an outer diameter-enlarged and an inner diameter-reduced wall section 27 and 27 '. The necessary sealing seat of the pump piston 22 is achieved by the interaction of the outer wall sections 27 'with the inner walls of the pump chambers 11.

As can further be seen from the illustrations, the bridge-like support member 23 is firmly embedded in a cavity 28 of another component. This also an elliptical base contour having component assumes the function of a pump head 29. The pump head 29 and the bridge-like support member 23 are telescopically guided together on the adapter part 4, based on the illustrations, vertically displaceable. For this purpose, the adapter part 4 has an upwardly open cavity 30. The edge region 31 of the cavity 30 is reduced in diameter, so that a necessary for the basic position end stop is formed for the pump head 29. The lower wall region of the pump head 29 is, as can be seen, formed enlarged diameter for this purpose.

In order to shift this back to the starting position according to FIG. 1 after pump head actuation, it is provided that the pump head 29 or the carrier element 23 mounted in the pump head 29 cooperates with a bellows-shaped return spring 32. This return spring 32, which has an elliptical plan, surrounds both the pumping chambers 11 and the pumping pistons 22 guided in the pumping chambers 11, wherein a coil end of the restoring spring 32 of angularly formed design is fastened to the upper side of the adapter part 4 via a corresponding latching connection 33 , The other opposite Windungsende the return spring 32 is supported on the underside of the support member 23 from. The fixation of this end of the winding is achieved by longitudinal ribs 34 starting from the support member 23.

The upper regions of the flow channels 24 of the pump pistons 22 are funnel-shaped like the inlet openings 10. In these areas are exhaust valves 35 sealing. These exhaust valves 35 have an identical physical shape as that of the intake valves 13, ie, the intake valves 13 and the exhaust valves 35 are of the same design and arranged differently in mirror-symmetry only. Therefore, substantially the same formations bear the same reference numerals. The vertical ribs 16 of the outlet valves 35 are in the flow channels 24 of the pump piston 22 above the longitudinal ribs 25 a. Also, the sealing seat of the outlet valves 35 via the lower marginal edges 20 of the crucible 15, which rest on the walls 36 of the funnel-like openings of the flow channels 24. The funnel pots 37 of the outlet valves 35 project into cavities 38. These cavities 38 are formed by the pump head 29 as well as by the carrier element 23. For this purpose, the support member 23 has on both sides the donor axis x symmetrically arranged, parallel, upwardly open Ringkrägen 39, in which the inner diameter of the ring collars 39 adapted and seated downwardly annular collars 40 sealingly. The cavities 38 have on their ceiling in the circumferential direction uniformly arranged vertical ribs 41 which rest flush on the end faces of the hopper pots 37 of the exhaust valves 35, so that the exhaust valves 35 are stop limit towards the top.

As shown particularly in FIGS. 3 and 4, discharge channels 42, which are arranged transversely to the dispenser axis x and which are formed transversely to the dispenser axis x, open into the cavities 38. These dispensing channels 42 run into a dispensing area 43 formed on the pump head 29. Both dispensing channels 42 are preferred arranged at an acute angle of about 62 ° to each other. By a common wall portion 44, the output channels 42 to the output area 43 are separated from each other. According to the configuration of the channels 42 of the pump head 29, the adapter part 4 is adapted accordingly in structure.

Further, it is provided according to FIG. 1 that the pump head 29 is covered over for protection by an overcap 45.

To remove the masses M present in the storage containers 7 or in the inner bags 8, after removal of the overcap 45, the pump head 29 is to be pressed down against the force of the return spring 32 in accordance with FIG. By this overpressure generated by the pumping pistons 22 in the pumping chambers 11, the mass M passes through the flow channels 24 in the direction of the outlet valves 35, which are raised vertically due to their soft configuration, so that the mass M flows through the openings 46 of the outlet valves 35 in the direction of the Output channels 42 flows to then exit the dispensing area 43 from the dispenser 1. Only now If necessary, the different masses M have contact with each other. This means that with this dispenser according to the invention 1 differently procured masses, such as those found, for example, in the cosmetics industry, can be applied.

If the user lets go of the pump head 29, the pump head 29 is moved back vertically via the return spring 32 into the basic position according to FIG. 1. Until the diameter-reduced edge region 31 of the adapter part 4 cooperates with the thickened lower wall cross section of the pump head 29 in a stop-limited manner. In the course of the return displacement of the pump head 29 and the pump piston 22 is formed within the pumping chambers 11, a negative pressure, so that under vertical lifting of the intake valves 13 from the storage containers 7 again mass M are sucked into the pumping chambers 11 in approximately equal doses. When the pump head 29 has reached its home position, the inlet valves 13 again seal the inlet openings 10.

Due to the mirror-symmetrical design of the donor 1 construction a functionally reliable and cost-effective dispenser 1 is created. Also with regard to the configuration of the inlet valves 13 and the outlet valves 35 is advantageous because they are identical and are thus inexpensive to produce.

All disclosed features are essential to the invention. The disclosure content of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application.

Claims

1. dispenser (1) for dispensing liquid to pasty masses with a pump head (29) and formed therein, a pumping chamber wall (12) having pumping chambers (11), each having an inlet (13) and an outlet valve (35), characterized in that each pump chamber (11) formed with a rigid pump chamber wall (12) is associated with a pump piston (22) received therein.

2. Dispenser according to claim 1 or in particular according thereto, characterized in that the pumping pistons (22) are connected to one another by engaging the pumping chamber walls (12).

3. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that the pumping pistons (22) are formed integrally with each other.

4. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that each pumping piston (22) is associated with a storage container (7).

5. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that in each storage container (7) for emptying volume-reducing storage bag (8) is included.

6. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that the pumping chambers (11) are surrounded in total by a return spring (32).

7. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that the return spring (32) is formed as a bellows.

8. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that the inlet valves (13) are each biased in their closed position.

9. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that the inlet valves

(13) are each formed of an elastically resilient plastic.

10. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that the outlet valves (35) are each biased in their closed position.

11. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that the outlet valves (35) are each formed from an elastically resilient plastic.

12. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that the inlet valves (13) are aligned with respect to each other equally aligned with the pumping chambers (11).

13. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that the outlet sventile (35) aligned with each other in the same plane from the pump head (29) are covered.

14. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that in each case the valve body of inlet valve (13) and outlet valve (35) are identical in shape.

15. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that in the pump head (29) two separate output channels (42) are formed, in a transversely to the dispenser axis (x) aligned plane an acute angle (α ) to each other.