DE202007004405U1 - Dispenser for dispensing liquid to pasty masses - Google Patents

Abstract

donor (1) for dispensing liquid until pasty Masses with a pump head (29) and formed therein, a pumping chamber wall (12) having pumping chambers (11), each having a single (13) and a Having outlet valve (35), characterized in that each with a pump chamber wall (12) rigid pump chamber (11) is associated with a pumping piston (22) received therein.

Description

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

Dispensers of the type in question are known in the art; for example from the 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.

Of the Invention is based on the object, in particular a dispenser as initially advantageous to further develop.

These Task is first and substantially a dispenser having the features of the claim 1 solved, taking care that each with a rigid pumping chamber wall trained pumping chamber associated with a pump piston received therein is. Such a configuration is in a double pump dispenser in particular achieved an improved output option. Independent of Compression of the pump chamber wall can be achieved by driving down the respective pump piston emptying the respective pumping chamber be caused. The synchronization evacuation of the pumping chambers is not by different shape work of the pumping chamber walls disturbed. In addition, the rigid formation of the pumping chamber walls together with the pump piston received therein advantageous for total centering and leadership be used to each other movable donor parts.

Prefers 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. according to the rigid or smooth shape of the pumping chamber walls are on actuation the pump head over the masses the pump pistons practically "scraped" from the walls of the pumping chambers, so that ultimately a improved emptying of the pumping chambers can be achieved.

foot side the pumping chambers run over funnel-like tapers in a cylinder-like inlet portion. In the funnel-like rejuvenation are preferably the intake valves included. On the upper side the pumping chambers corresponding preferred, funnel-like expanding Outlet sections, in which the exhaust valves are arranged. The pumping chambers are preferably of an integrally molded adapter part formed on which the pump head is slidably supported.

in the Further features are described, preferably in combination have meaning with the features of claim 1, but also in principle with only some features of claim 1 or alone significance can.

So it proves to be advantageous that the pump piston under attack the pumping chamber walls are connected to each other and that the pumping pistons preferably in one piece with each other are formed. In this respect, the pump pistons are in more advantageous Way through a single, in cross-section approximately bridge like shaped, component educated. The loading of both pump pistons can be so by applying this (a) component done. The connection of the pump pistons among themselves is also technically favorable montagetechnisch. Will not the one-piece production selected can The pump piston on this component, for example, be locked. Through it also one-piece Co-education the pump piston is one too over it beyond, over the reduction of the individual parts as such, favorable simplification of the building structure reached. The overall stability is favorably promoted. Preferably, the pump piston or the pump chambers are on both sides the donor axis arranged, more preferably mirror-symmetrical.

In the preferred elliptical floor plan having outer casing of the Dispensers are two preferably identically designed storage containers fixed, with each pumping piston or each pumping chamber a Reservoir assigned is. In these storage containers is one filled with mass, for emptying volume reducible stock bag included. to Fixation of the storage bag is provided that these in the storage containers each along a line with the bottom of the storage containers are connected. An inverted the storage bag is prevented. Regarding a possible Design of the storage bag is on the German utility model 205005014895 directed. The content of this publication is hereby complete included in the disclosure of the present invention, also to For the purpose, features of this utility model in claims present Include 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 that the pumping chambers in total 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 advantageous in terms of power (lever arm).

The Return spring formed from a plastic material is preferred as suitably produced in the plastic injection molding bellows formed and has a basic contour, the oval donor base contour is adjusted. This production allows a favorable adaptation of the geometry the given conditions. It can also be provided that both the dispenser and the return spring have a circular basic contour. Alternatively, the Pump piston each of a return spring be surrounded, which return springs For example, be designed as steel springs with a circular cross-section can.

When functional low proves to be the measure that the inlet valves biased in each case in its closed position are. The trained as separate parts and made of an elastic resilient plastic existing inlet valves are supported on a housing part, preferably the pump chamber wall, which in turn in turn by a latch is reached, in its valve body seat under elastic Deformation pressed, causing the aforementioned bias in detail is reached. They sit in the funnel-like inlet openings the pumping chambers with elastic pre-deformation. Upon actuation, i.e. in this case, a vacuum in the pumping chamber becomes the deformation elevated in the course of lifting the intake valves, which sucked mass from the storage container becomes.

At the housing part or the pumping chamber walls are preferably in the circumferential direction of inlets tori or other Rastierungsvorsprünge provided, which respectively the inlet valves in the direction of the respective Holding pumping chambers. If the pump head by the return spring be relocated to its original position In each case, the inlet valves are to some extent "raised" by the generated negative pressure, so that accordingly the stored in the storage bags masses in the respective Pumping chambers for refilling be sucked the same. In detail, as below even closer explains, points Such an inlet valve two pot-like areas with each other on, with a larger diameter above and a smaller diameter below, 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 thus flows around mass, it is further preferred above this sealing surface in the pot or the cone area form one or more mass passage openings, to that extent then to facilitate the passage of the mass through the inlet valve.

Also are also each formed of an elastic resilient plastic outlet valves each incorporated biased in their closed position. The extent preferably identical to the intake valves trained exhaust valves are in this case biased by the fact that they are with the frontal top edge of the pot is on the ceiling of a pump head support and are pressed into the closed position.

Further preferred are the valve seats for the exhaust valves directly into the with a passage for the mass provided pump piston itself formed. In this case, the exhaust valves come with a section respectively in the flow channels of the pump piston.

in the With regard to a desired and preferably realized uniform design of the exhaust valves and the intake valves can also the exhaust valves, in this case then identical in form to the Inlet valves, circumferentially one or more mass flow ports exhibit. With donor inward been executed Stroke of the pump head are each caused by the exhaust valves the generated overpressure because of their elasticity "raised", so that along the stored in the pumping chambers masses are transported to the discharge opening. This is about the same dosage. Furthermore, it is provided that the inlet valves to each other equally aligned with the pumping chambers are upstream. By this level arrangement are in an advantageous Way for the valve seat competent funnel-like inlet openings the pump chambers also equal in terms of height educated. In view of this, it is further advantageous that the exhaust valves also aligned with each other evenly from over the pump head are. As the exhaust valves as well as the intake valves evenly are arranged, is also a symmetrical configuration of the pump piston training one-piece Components and pumping chambers feasible. Due to the already mentioned preferred identical embodiment of the valve body can also the respective valve seats of the intake and exhaust valves substantially be formed identically.

According to the invention it is further provided that in the pump head, two separate output channels are formed, which spit in a plane aligned transversely to the donor axis zen angle of about 60 ° to 65 °, preferably 62 °, to each other, so that the output channels preferably open into a common mass delivery area, being up to the output of the masses, the output channels themselves are separated by a common Wandungssteg. In this respect, mixing is possible only from a separate storage container ausbringbaren masses outside the donor.

By the construction structure according to the invention the pump piston, the pump chambers, the inlet / outlet valves and the identical trained storage containers is a double pump dispenser created, which in total over has a mirror-symmetrical construction. Inso far away the production of the dispenser according to the invention is inexpensive. moreover elevated the mirror-symmetrical design structure the functional safety of the entire donor.

below The invention is further based on the accompanying drawings, but here only an embodiment represents explained.

in this connection shows:

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

2 the section according to the line II-II in 1 ;

3 the section according to the line III-III in 1 ;

4 the section according to the line IV-IV in 2 ;

5 an enlarged partial section of the dispenser according to the invention with the pump head displaced inwards;

6 the essential components of the donor in an exploded view;

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

8th the bottom view of the valve body according to the note VIII in 7 ,

Illustrated and described first with reference to the 1 and 2 a double pump dispenser 1 for the dispensing of liquid to pasty masses M. The dispenser having an ellipsoidal basic contour 1 has a Außenge housing 2 at the neck 3 an adapter part 4 by means of appropriate latching connection 5 is attached.

The adapter part 4 has molded on both sides of a donor x, in the interior of the housing 2 protruding, circular formed Rastaufnahmeflansche 6 on. Both the adapter part 4 as well as the molded Rastaufnahmeflansche 6 are formed mirror-symmetrically, with the Rastaufnahmeflansche 6 for fixing two in the interior of the housing 2 mirror-symmetrically positioned storage containers 7 serve. In the identically designed storage containers 7 each is a largely loose inner bag 8th arranged, in which the mass M to be dispensed is contained. The inner bag 8th can each be in the bottom area of the storage containers 7 in places or along a line with the bottom of the storage containers 7 be connected, so that an everting of the inner bag 8th is prevented. Outer walls are the inner bag 8th each on the inner wall of the neck areas 9 the reservoir 7 attached.

From the adapter part 4 are each inlet openings 10 having protruding neck S formed. The symmetrically shaped sockets S are each centric in the locking receiving flanges 6 arranged and pointing over the neck areas 9 in the storage container 7 or the inner bag 8th , The funnel-like and symmetrical inlet openings in cross-section 10 in each case, as can be seen, form the open bottom area of two parallel pumping chambers 11 , The latter are each arranged on both sides of the dispenser axis x and parallel pump chamber walls 12 formed, which in turn are cylindrical and have a circular cross-section. The catch flange 6 and the sockets S, the inlet openings 10 and the pump chamber walls 12 are part of the integrally and mirror-symmetrically manufactured adapter part 4 ,

At funnel-shaped bottom portion of the pumping chambers 11 are each centrally arranged, identically formed inlet valves 13 arranged in the form of soft valves mirror symmetry to the dispenser axis x. In the detail of the 7 and 8th is such an inlet valve 13 shown enlarged. Here it can be seen that the inlet valve 13 has an approximately funnel-shaped longitudinal cross-section. The upper funnel pot 14 is circular in cross-section. At the foot ends the funnel pot 14 in a reduced diameter, cylindrical shaped, crucible-like section 15 , At this crucible section 15 are vertical ribs 16 molded, which in turn in the circumferential direction of the crucible section 15 are each arranged at an angle of about 120 °, so that the inlet valve 13 over a total of three vertical ribs 16 features. At the transition area between hopper pot 14 and crucible section 15 are in the circumferential direction of the hopper pot 14 from the wall of three uniformly distributed molded Durchtrittsöffnun gene 17 intended. These passages 17 are, in particular the 8th each to take a vertical rib 16 assigned and symmetrical to the vertical ribs 16 aligned. In addition, on the inner wall of the funnel pot 14 stabilizing longitudinal ribs 18 molded, evenly over the circumference of the funnel pot 14 are distributed.

As a valve seat for the intake valves 13 is provided that each of the pumping chambers 11 on their inner walls diameter-reducing ring collars 19 exhibit. These are inside the pumping chambers 11 at a distance from the funnel-shaped bottom area of the pumping chambers 11 arranged. This causes the intake valves 13 inside the pumping chambers 11 secured in the longitudinal direction, ie in the direction of the dispenser axis x upwards. Over the lower edge 20 the crucible sections 15 are the intake valves 13 in the unactivated state of the donor 1 each on the funnel walls 21 the inlet openings 10 sealing up.

Above the inlet valves 13 are each in the pumping chambers 11 , based on the illustrations, vertically displaceable pump pistons 22 stored. Like the pumping chambers 11 are also the pump pistons 22 identical and mirror-symmetrical design. For this purpose, it is provided that the respective pump piston surrounding an axis v 22 from a one-piece and bridge-like support member 23 be formed. While the pump pistons 22 each with their outer diameters to the inner diameter of the pumping chambers 11 are adapted, the outer contour of the carrier body 23 to the elliptical base contour of the dispenser 1 customized. The intake valves 13 upstream pump piston 22 have each arranged in the longitudinal direction centric flow channels 24 for the output M mass. These flow channels 24 are upstream in the circumferential direction of the pump piston 22 evenly distributed longitudinal ribs 25 , The necessary piston surfaces 26 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 portion 27 and 27 ' , The necessary sealing seat of the pump pistons 22 is due to the interaction of the outer wall sections 27 ' with the inner walls of the pumping chambers 11 reached.

As can further be seen from the illustrations, the bridge-like support member is designed 23 stuck in a hollow 28 embedded another component. This also an elliptical basic contour having component assumes the function of a pump head 29 , The pump head 29 and the bridge-like carrier member 23 together are telescopic on the adapter part 4 , based on the illustrations, led vertically displaceable. For this purpose has the adapter part 4 an upwardly open cavity 30 , The border area 31 the cavity 30 is reduced in diameter, allowing for the pump head 29 a necessary for the basic position end stop is formed.

The lower wall area of the pump head 29 is, as can be seen, this enlarged diameter formed.

Thus after pump head actuation this in the starting position according to 1 is relocated, it is provided that the pump head 29 or in the pump head 29 mounted carrier organ 23 with a bellows-shaped return spring 32 interacts. This elliptical plan having return spring 32 surrounds both the pumping chambers 11 as well as those in the pumping chambers 11 guided pump piston 22 , Wherein a cross-sectionally angularly formed Windungsende the return spring 32 via a corresponding locking connection 33 on the top of the adapter part 4 attached with this. The other opposite Windungsende the return spring 32 is supported on the underside of the carrier 23 from. The fixation of this Windungsendes is by the support member 23 outgoing longitudinal ribs 34 reached.

The upper areas of the flow channels 24 the pump piston 22 are like the inlet openings 10 funnel-shaped. In these areas are exhaust valves 35 sealingly. These exhaust valves 35 have an identical physical shape as that of the intake valves 13 ie the inlet valves 13 and the exhaust valves 35 are the same design and arranged only mirror-symmetrically different. Therefore, substantially the same formations bear the same reference numerals. The vertical ribs 16 the exhaust valves 35 lie in the flow channels 24 the pump piston 22 above the longitudinal ribs 25 one. Also, the sealing seat of the exhaust valves 35 takes place over the lower margins 20 the crucible sections 15 which are on the walls 36 the funnel-shaped openings of the flow channels 24 seated. The funnel pots 37 the exhaust valves 35 protrude into excavations 38 , These excavations 38 be both from the pump head 29 as well as from the carrier organ 23 formed. For this purpose has the carrier organ 23 each on both sides of the dispenser axis x symmetrically arranged, parallel, upwardly open Ringkrägen 39 in which the inner diameter of the annular collars 39 adapted and downward-pointing ring collars 40 sit sealingly. The excavations 38 have on their ceiling circumferentially uniformly arranged vertical ribs 41 , which respectively on the faces of the funnel pots 37 the exhaust valves 35 lie flush, so that the exhaust valves 35 are limited to the top stop.

As in particular in the 3 and 4 represented, open into the excavations 38 , in each case transversely to the donor axis x arranged from the pump head shaped output channels 42 , These output channels 42 run into one on the pump head 29 molded output area 43 , Both output channels 42 are preferably arranged at an acute angle of about 62 ° to each other. Through a common wall section 44 are the output channels 42 to the exit area 43 separated from each other. According to the design of the channels 42 the pump head 29 is the adapter part 4 adapted accordingly in the structure.

Next is according to 1 provided that the pump head 29 for protection of an overcap 45 is overflowed.

To remove the in the storage containers 7 or in the inner bags 8th existing mass M is after removing the overcap 45 the pump head 29 against the force of the return spring 32 inward according to 4 depress. Through this through the pump pistons 22 in the pumping chambers 11 generated overpressure passes through the mass M, the flow channels 24 in the direction of the exhaust valves 35 which are raised vertically due to their soft configuration, so that the mass M through the openings 46 the exhaust valves 35 in the direction of the output channels 42 flows to then at the output area 43 from the donor 1 withdraw. 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 sourced masses, as they are used, for example, in the cosmetics industry, are ausbringbar.

If the user leaves the pump head 29 go, the pump head 29 over the return spring 32 in the basic position according to 1 moved back vertically. Until the diameter-reduced edge area 31 of the adapter part 4 with the thickened lower wall cross-section of the pump head 29 stop limited cooperates. In the course of the return displacement of the pump head 29 or the pump piston 22 arises within the pumping chambers 11 a negative pressure, allowing under vertical lifting of the intake valves 13 from the storage containers 7 again mass M in approximately equal doses into the pumping chambers 11 be sucked. Has the pump head 29 reached its basic position, seal the intake valves 13 again the inlet openings 10 from.

Due to the mirror-symmetrical design of the donor 1 Overall, it is a reliable and cost-effective donor 1 created. Also with regard to the design of the intake valves 13 or the exhaust valves 35 is advantageous because they are identical and are thus inexpensive to produce.

All disclosed features are (for itself) essential to the invention. In the disclosure of the application will hereby also the disclosure content of the associated / attached priority documents (Copy of the advance notice) fully included, too for the purpose, features of these documents in claims present Registration with.

Claims (15)

Donor ( 1 ) for dispensing liquid to pasty masses with a pump head ( 29 ) and formed therein, a pump chamber wall ( 12 ) having pumping chambers ( 11 ), each one ( 13 ) and an outlet valve ( 35 ), characterized in that each having a rigid pumping chamber wall ( 12 ) trained pumping chamber ( 11 ) a pumping piston received therein ( 22 ) assigned. Dispenser according to claim 1 or in particular according thereto, characterized in that the pumping pistons ( 22 ) under attack of the pump chamber walls ( 12 ) are interconnected. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that the pumping pistons ( 22 ) are integrally formed with each other. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that each pumping piston ( 22 ) a storage container ( 7 ) assigned. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that in each storage container ( 7 ) a volume-reducing storage bag for emptying ( 8th ) is included. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that the pumping chambers ( 11 ) in total by a return spring ( 32 ) are surrounded. 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. 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. 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. 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. 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 of an elastically resilient plastic. 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 one another in the same way as the pump chambers ( 11 ) are upstream. Dispenser according to one or more of the preceding claims or in particular according thereto, characterized in that the outlet valves ( 35 ) aligned with each other in the same plane from the pump head ( 29 ) are covered. 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 exhaust valve ( 35 ) are identical in shape. 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, which in an aligned transversely to the donor axis (x) plane an acute angle (α) to each other.