EP3934813A2

EP3934813A2 - Dispenser for dispensing flowable masses

Info

Publication number: EP3934813A2
Application number: EP20707648.0A
Authority: EP
Inventors: Sabine Göttke; Martin Presche
Original assignee: RPC Bramlage GmbH
Current assignee: RPC Bramlage GmbH
Priority date: 2019-03-05
Filing date: 2020-03-02
Publication date: 2022-01-12
Also published as: WO2020178225A3; WO2020178225A2; CN113490629A; US20220152640A1; CN113490629B; BR112021014286A2; US11745200B2

Abstract

The invention relates to a dispenser (1) for dispensing flowable, for example liquid or pasty, masses (M), comprising a reservoir (2) for holding the mass (M) and a modular dispenser pump (6), wherein: the dispenser (1) has a longitudinal axis (x); furthermore, the dispenser pump (6) has an input channel (12), an output channel (13) and a pump chamber (11), which is delimited by values (14, 15) on the input side and the output side; a head piece (5) is provided; the head piece (5) has a dispensing opening (23) and a dispensing channel (22); furthermore, the dispenser pump (6) can be inserted into the reservoir (2) and can be connected to the reservoir (2) by means of a locking connection; furthermore, the pump chamber (11) is formed by a piston (8) and a cup part (9), which has a cup bottom (29) and a cup wall (17); the piston (8) is slidably accommodated in the cup part (9), in order to achieve a pumping stroke (b); furthermore, the cup part (9) has, on the outer wall thereof, fastening formations for fastening interaction with an inner wall of the reservoir (2); the locking connection (30) is strengthened by virtue of the fact that, with respect to a longitudinal cross-section through the dispenser (1), the locking connection (30) is provided by two radially outwardly protruding locking beads (31, 32), which are spaced apart from one another in the vertical direction. According to the invention, in order to further improve a dispenser of the type in question with respect to fastening, both locking beads (31, 32) are designed with an insertion rounding (37) on the reservoir side and, in contrast, with a substantially horizontal contact surface (38) with respect to the longitudinal section on the head piece side.

Description

description

Dispenser for dispensing flowable materials

Field of technology

[0001] The invention relates to a dispenser for dispensing flowable, for example liquid or pasty, masses, with a storage container for receiving the mass, with a modular dispenser pump, wherein the dispenser has a longitudinal axis, the dispenser pump has an input and an output channel and an input and output channel limited by valves and a head piece, the head piece having a dispensing orifice and a dispensing channel, the dispenser pump can also be inserted into the storage container and in this case by a latching connection with the storage container can be connected, furthermore the pump chamber is formed by a piston and a pot part, which has a pot bottom and a pot wall, the piston being slidably received in the pot part to achieve a pumping stroke, the pot part also having outer wall attachment shapes has, for fastening together Effect with an inner wall of the storage container, the locking connection is thereby reinforced ausgebil det that the locking connection is given based on a longitudinal cross-section through the dispenser by two vertically spaced apart and radially outwardly protruding locking beads.

State of the art

A dispenser with a modular and interchangeable design of the dispenser pump is known for example from EP 1 015 340 B1. Through this education from a compact dispenser pump is specified, which can be set in a variety of freely configurable in their head piece and storage container dispensers. From DE 10 2008 030 118 A1 a dispenser with a locking connection is known, the locking connection being provided in detail by means of a locking bead. This locking connection is not considered to be satisfactory in all respects. From DE 100 330 040 Al a dispenser is known in which the

Pump chamber has a pot part which is connected to an inner wall of a storage container before. In the course of a pumping process, mass is pressed into an output channel, which at the same time pushes back a valve that closes a dispensing orifice of the output channel, giving the valve a free space on the side facing away from the mass. To prevent overpressure in the free space, there is an air path from the free space into the inner space formed by the pot part and the piston part, which in turn has an air path to the outside. The piston part is guided directly on a wall part which also forms an outer surface of the pot part.

Summary of the invention

With regard to the prior art described above, the invention has the object of advantageously designing a dispenser of the type in question in terms of attachment.

[0006] A possible solution to this problem is given according to a first inventive concept in a dispenser, which is based on the fact that both locking beads on the storage container side are formed with an insertion curve, while on the head piece side, based on the longitudinal cross-section, one is essentially horizontally extending Contact surface. [0007] As a result of the proposed embodiment, a particularly functionally reliable dispenser is created. The dispenser pump can easily be combined with a variety of un ferent storage containers in the course of a manufacturing assembly. If a combination is made and the dispenser pump is locked in the storage container, however, an operationally reliable, practically non-detachable connection is given.

With regard to the production of the dispenser and a first-time connection between the dispenser pump and the storage container, it is further ensured that the dispenser pump can be connected to any storage container adapted with regard to the connection, this with further comparatively simple training of the connection formations the dispenser pump and the storage container. In terms of production, it is thus possible to choose between different dispenser pumps or different storage containers with great freedom until the dispenser pump is actually assembled with the storage container.

On the other hand, secures the two in the vertical direction zueinan the spaced and radially outwardly protruding locking beads, with a lead rounded reservoir side and a horizontally extending contact surface on the head piece side the reinforced locking connection between the dispenser pump and the supply container. Once the connection has been established, the dispenser pump reliably holds on to the container, and this also in the case of increased stress, in particular increased external stress. Thus, for example, a lateral load (correspondingly from radially outside) on the locking connection viewed in relation to the longitudinal axis of the dispenser cannot trigger any effect that would cancel the locking connection. Even with a possible use of the dispenser pump when the dispenser is designed, for example, in a massage head, the dispenser pump can be used the reinforced snap-in connection, in particular not by force of the usual hand, separate it from the storage container.

[0010] As a result of this embodiment, it can also be ensured that the dispenser pump cannot be separated from the associated storage container and assigned to another, improper storage container without special, extraordinary effort.

[0011] The reinforcement is furthermore preferably chosen so that, compared to the known snap-in connection, in particular the known snap-in connection from the aforementioned prior art, at least 1.5 times up to 3 or 5 times the force to cancel the locking connection is necessary.

The latching connection is preferably chosen so that it cannot be lifted by normal manual force, that is to say without tools and without destruction.

[0013] Further features of the invention are explained below, also in the description of the figures, often in their preferred assignment to the subject matter of claim 1 or to features of further claims. However, they can also be assigned to only individual features of claim 1 or the respective further claim, or in each case regardless of meaning. The locking beads can extend in an annular manner in relation to the longitudinal axis, correspondingly over the full circumference of the part of the dispenser pump or the storage container having the locking bead. The counter-locking part, corresponding to the storage container or the dispenser pump, is preferably designed accordingly and adapted to the transverse cut locking grooves. As is also preferred, these can also extend over the full circumference.

Alternatively, the locking beads, optionally also the locking grooves, extend only over a portion of the circumference, further viewed over the circumference, a plurality of locking beads and locking grooves can optionally be provided.

The spacing of the locking beads viewed in one axial direction corresponds preferably to 1 to 5 times, more preferably 1.5 to 2 times, the extent of a locking bead viewed in the same direction.

The two locking beads can have the same cross-sections, both in terms of their geometric design and in terms of their axial and radial dimensions. In addition, the locking beads can also be designed differently with regard to their cross-sections, here too differently with regard to their geometrical configuration and / or their radial and / or axial dimensions.

The lead-in rounding, which is formed on the storage container side in each case on the locking beads, has a supportive effect in the course of fastening the dispenser pump to the storage container. As a result of the insertion rounding, a peripheral edge surrounding the container opening as well as the locking groove initially formed in the insertion direction is advantageously overrun.

[0019] The contact surface provided on the head piece side of both locking beads in relation to the longitudinal cross section to run essentially horizontally acts in the locked position of the dispenser pump on the front Council container with a counter-contact surface of the locking groove together, which runs in the same direction before given, accordingly also essentially horizontally.

As a result of this configuration, the latching beads are shaped like a barb, which supports the insertion and movement of the dispenser pump into the latching position for the storage container, but prevents the latching from being canceled.

The invention further relates to a dispenser for dispensing flowable genes, for example liquid or pasty masses, with a storage container for receiving the mass and a dispenser pump, the dispenser having a longitudinal axis, the dispenser pump also having an input and an output channel and has an input and output side limited by valves be pump chamber and a head piece, the head piece having a dispensing orifice and a dispensing channel, wherein the pump chamber is formed by a piston and a pot part, which has a pot bottom and a pot wall, the Piston is included in the pot part slidably movably, to achieve a pumping stroke and between egg nem piston part connected to the piston and the pot bottom a Rückstellfe acts, the piston part also has a contact cover on which the restoring spring supported on the pot bottom rests and together with the pot part a first interior bil det, the volume of which changes when the pump is actuated, the first interior space also being surrounded by a second interior space which is formed between the head piece, the pot part and the piston part.

In a dispenser known from DE 10330040 A1, a first interior space is connected to a second interior space located above it. However, when one is depressed, the volume in the first and second The interior space is merely compressed, the second interior space also being made smaller by a closure part when the dispenser is opened and the pressure in the first interior space is also increased.

In a dispenser known from DE 19938798 A1, only two interiors arranged in series are provided, which are not connected to the one by a ventilation opening either. The same also applies to the dispensers known from DE 3900267 A1 and EP 1015340 B1. Based on a dispenser as it is known, for example, from DE 10 2008 030 118 A1, the invention is concerned with the task of ensuring advantageous handling.

This object is achieved in the subject matter of claim 9, the point being that an airway is formed in the system ceiling to avoid a pressure build-up in the first interior space in the course of a pump actuation.

With the proposed air path, an air cushion that may be adjusting between the pot and the piston part when the dispenser pump is actuated, in particular when the pump chamber volume is reduced, can be avoided. An associated pressure build-up would lead to an increase in the actuation force for the displacement of the head piece in addition to the restoring force of the restoring device. This problem is avoided by the given airway. Via the air path in the preferred embodiment, the interior space between the pot part and the piston part is exposed to the ambient air pressure regardless of the position of the head piece relative to the dispenser pump. The second interior space, which surrounds the first interior space, is due to a usually given gap between the head piece and the pot part with the ambient air in connection and thus under the same pressure. Air flowing from the first interior into the second interior when actuated to avoid overpressure in the first interior can easily escape into the environment without a relevant pressure build-up in the second interior.

In a possible embodiment, the airway can be provided in the form of a type of bore in the upper end wall of the piston part. The end wall can also be almost completely open outside of the structurally required areas for holding, for example, a piston part wall and a connection to the outlet channel, so that a correspondingly enlarged air path is established. For example, the end wall of the piston part can be designed like a spoke in relation to a plan view in which the longitudinal axis is represented as a point, the airways between the spokes being produced.

Brief description of the drawings

The invention is explained in more detail below with reference to the accompanying drawing, which merely represents an exemplary embodiment. It shows: Fig. 1 a dispenser of the type in question in a longitudinal section;

FIG. 2 the enlargement of the area II in FIG. 1;

3 shows the enlargement of area III in FIG. 1; Fig. 4 shows a piston part of the dispenser in a perspective individual representation.

Description of the embodiments

Is shown and described, initially with reference to Figure 1, a dispenser 1 for arrangement on a storage container 2. In the illustrated embodiments, the storage container 2 is designed as a substantially cylinder-like body, with a central longitudinal axis x which in a corresponding assignment position, the dispenser 1 also passes through it, preferably in the form of an axis of rotation.

The storage container 2 has a storage chamber 3 for receiving a mass M to be dispensed. This storage chamber 3 is delimited on the bottom by a follower piston 4.

The dispenser 1 is inserted and fastened to the storage container 2 in the upwardly facing opening of the storage container 2 in the normal set-up state of the storage container 2. The dispenser 1 is essentially composed of a head piece 5 and a dispenser pump 6.

The dispenser pump 6 initially has a piston body 7 with a piston 8 and a pot part 9 with a pot bottom 28 and a cylinder section 10. The piston 8 is received in the cylinder section 10 such that it can slide along the longitudinal axis x, a pumping chamber 11 being formed between the piston 8 and the cylinder section 10 and further limited by the pot bottom 28 of the pot part 9. The pot part 9 is designed to be exchangeable for adaptation to different storage containers 2, in particular different opening diameters and / or cross-sections of the storage container 2.

The pump chamber 11 connects an input channel 12 and an output channel 13, both channels being separable from the pump chamber 11 by an input valve 14 and an output valve 15.

The two valves 14 and 15 designed as check valves are preferably installed in such a way that they open in the same direction, that is, in the dispensing direction. Between the piston part 7 and the cylinder section 10 is a

Resetting device 16, here in the form of a cylinder spring, is arranged. Since it can be a metal cylinder spring in the usual way. As an alternative, a spring made from an appropriately elastically resilient plastic material can also be provided here to implement an all-plastic dispenser.

The reset device 16 is further arranged so that it is supported in a preferably concentric arrangement to the catch axis x at one end on the pot bottom 28 and the other end acts against an upper end wall of the piston part 7, such that the head piece 5 with the piston part 7 and the Piston 8 is acted upon in the direction of a pump chamber enlargement in order to refill the pump chamber 11 after a pump stroke has taken place in which the pump chamber volume is reduced.

The piston part 7 and the pot part 9 are each essentially pot-shaped. They are in engagement with each other and together limit men the dispenser pump 6 to the outside, so that a capsule-like housing is gebil det. At least one fastening projection 28 can be provided on a radial pot wall 17 of the pot part 9, which, for example, can also be designed as a ring projection. This fastening projection 18 is used to fix the position of the dispenser pump 6 in the installed state between the head piece 5 and the storage container 2.

In the embodiment shown, the valves 14 and 15 are designed as so-called annular gap valves with an annular valve body which each Weil covers an annular gap 19 or 20 of the input or output channel 12, 13.

Due to the radially symmetrical design of the dispenser pump 6, a homogeneous dispensing behavior is achieved. However, the dispenser pump is not limited to radially symmetrical designs, but can also have any shape, for example square or polygonal, in cross section for example. Instead of the annular gap valves shown, other known check valves, for example flap valves, can also be used.

Furthermore, the piston 8 can be designed in one piece with the piston part 7. A kinematic reversal of the dispenser pump 6 with a reversal of the opening direction of the check valves is also possible. The head piece 5 adjoins the dispenser pump 3, which has a domed actuating part 21 with a dispensing channel 22 and a dispensing orifice 23, further an actuating surface 24, preferably transverse to the longitudinal axis x, and an actuating part wall 25, optionally concentric to the longitudinal axis x . On the outside of the wall, preferably circumferentially, the actuating part 21 is guided over its actuating part wall 25 through the pot wall 17 of the pot part 9 in the axial direction.

The first in the illustrated embodiment, the longitudinal axis x in its longitudinal extension receiving the dispensing channel 22 is with reference to a cross-sectional view in which the longitudinal axis x is never shown as Li, for example, according to Figure 1 with a preferably obtuse angle to the longitudinal axis x Outwardly and opens into the dispensing orifice 23. The dispensing channel 22 is here sealingly inserted into the output channel 13, with the piston 8, the piston part 7 and the dispensing channel 22 together with the actuating part 21 for the common method along the longitudinal axis x in the use position _Z usammenwirken. Correspondingly, the entire head piece 5 with the piston 8 firmly attached to it is supported via the resetting device 16.

With the insertion of the dispenser pump 6 or the dispenser 1 as a whole in the supply container 2, a lower edge 28 of the dispenser pump 6 with its input channel 12 dips so deep into the storage container 2 and thus into the mass M stored there that a direct Contact to the mass M to be donated is given. Thus, when the dispenser 1 is placed on the storage container 2, the mass M can spread through the inlet valve 14, which opens in the course of the exposure as a result of pressurization, into the pump chamber 11 for the first filling thereof.

As can also be seen from the illustration in FIG. 1, the dispenser 1, in particular the head piece 5, can be covered by a cap 26 in the non-use position. In this case, this is in the area of the pot wall 17 locked in place, optionally, as further preferred, with axial support on the fastening projection 18.

In addition, a limiting device 27 is provided to limit the axial displacement of the head piece 5 together with the piston 8, in particular in a position at a distance from the pot part 9. This limiting position shown is the position of maximum filling of the pump chamber 11.

The dispenser pump 6 is fixed to the storage container 2 by a latching connection 30. This is given in an area essentially directly below the fastening projection 18 of the pot part 9, which is supported on the wall of the storage container 2.

Thus, on the outside of the pot wall 17, relative to the longitudinal axis x, two mutually spaced locking beads 31, 32 are provided, each of which protrudes radially outward over an otherwise existing circumferential outer surface 33 of the pot wall 17.

In a preferred embodiment, the outer surface 33 of this pot wall 17 rests against the facing inner surface 34 of the chamber wall 35 in the locking position.

In the exemplary embodiment shown, the two locking beads 31, 32 are designed identically with regard to a cross section as shown in FIG.

So each locking bead 31, 32 is in the insertion direction r of the dispenser pump 6 in the storage container 2 initially at an acute angle a with a to the longitudinal axis x considered parallels y of about 30 to 45 degrees a closing leg 36 is provided, which against the insertion direction r direction tet extends radially outward rising.

This leg 36 merges at the end into an insertion rounding 37, which in turn runs into a contact surface 38 running approximately at right angles to the axis with respect to the longitudinal axis x in the longitudinal cross-section. The contact surface 38 is correspondingly opposite and transverse to the insertion direction r directed.

Overall, this results in an approximately triangular or wedge-shaped cross-sectional configuration of the latching bead 31, 32 with a corner formation rounded by the insertion rounding 37.

Viewed in the direction of extension of the longitudinal axis x, the result is a height a of each locking bead 31, 32 which can correspond to approximately 1/3 to 2/3 further, for example approximately 1/2 of the material thickness of the chamber wall 35. The height a is here taken off between the root areas of the locking beads 31, 32, in which they run into the outer surface 33 of the pot part 9 (see Figure 2).

The distance b of the locking beads 31, 32 to one another, also viewed in the direction of extent of the longitudinal axis x, can correspond to approximately 1.5 to 3 times, further approximately 2 times the locking bead height a. The radial extension c viewed transversely to the height a, which in the latching position corresponds to the entry dimension of the latching beads 31, 32 into the chamber wall 35, can be approximately 0.3 to 0.8 times, further approximately 0, 5 times the bead height a. In the latching position according to FIG. 2, the latching beads 31, 32 are latched into latching grooves 39 of the chamber wall 35, which are arranged accordingly and adapted in terms of cross-section. These locking grooves open correspondingly towards the inner surface 34 of the chamber wall 35, whereby to reinforce the locking position the contact surfaces 38 of the locking beads 31, 32 are assigned correspondingly aligned counter-contact surfaces 41 that cover the entire area.

In the latching position, the latching beads 31, 32 are in an engagement position with respect to the counter-contact surfaces 41 of the latching grooves 39, 40.

As a result of the lead-in bevel-like configuration of the legs 36 and the subsequent lead-in rounding 37, the latching position can be found in a favorable manner. In particular, the free upper marginal edge of the chamber wall 35 as well as the locking groove 49 initially provided in the insertion direction r is overrun in a favorable manner. The legs 36 and the round insertion 37 support this effect. A withdrawal of the dispenser pump 6 from the latching position against the insertion direction r is prevented by the possibly full-surface contact of the contact surfaces 38 on the mating contact surfaces 41.

A first interior space 43 results between the cylinder section 10 of the pot part 9 and a piston part wall 42 comprising this cylinder section 10 and the restoring device 16. The restoring device 16 is accommodated in this, preferably in the form of a cylinder spring.

The piston part wall 42 is arranged on the piston part 7 via an upper contact ceiling 44, against which the restoring device 16 steps on the underside. In order to prevent pressure build-up in the interior 43 in the course of an actuation of the head part 5 and the associated reduction in the volume of the pumping chamber 11 as well as the volume of the interior 43, the contact ceiling 44 has an air path 45 that connects the first interior 43 using a surrounding second interior space 47 with the surrounding area. Correspondingly, regardless of the position of the head part 5 relative to the dispenser pump 6, there is a customary ambient pressure in the first interior 43 in the first interior 43.

The second inner space 47 clearly opens into a gap between the head piece 5 and the pot part 9, which enables a constant exchange with the ambient air. When the head piece 5 is pressed down, as a result of actuation of the dispenser, the first interior space 43 is reduced in size and air can flow through the airway, specifically the opening 46, into the second interior space 47 and from there via the aforementioned gap into the environment. As noted, the airway 45 is given in the illustrated embodiment example in Lorm of a bore-like opening 46 within the closure wall 44 (compare in particular Ligur 4).

In addition, this opening 46 provides improved ventilation and venting of the leather chamber formed below. Furthermore, in the course of the assembly of the dispenser 1, a control, for example a visual inspection, can be carried out via the opening 46 to determine whether the reset device 16 necessary for the function of the dispenser 1 is inserted. This is usually visible through the opening 46.

The above explanations serve to explain the inventions covered by the application as a whole, which correspond to the state of the art. at least through the following combinations of features in each case independently, whereby two, more or all of these combinations of features can also be combined, namely:

Dispenser 1, which is characterized in that the latching connection 30 is reinforced and / or that a pressure build-up with respect to an interior space formed by the pot part 9 and the piston part 7 is avoided by a suitable air path 45.

Dispenser 1, which is characterized in that the latching connection 30, based on a longitudinal cross section through the dispenser 1, is provided by two latching beads 31, 32 which are spaced apart in the vertical direction and project radially outward.

Dispenser 1, which is characterized in that a latching bead 31, 32 or both latching beads 31, 32 is or are formed on the storage container side with an insertion curve 37, on the other hand on the headpiece side with a substantially horizontally extending contact surface 38 based on the longitudinal cross-section.

Dispenser 1, which is characterized in that the airway 45 is formed through an opening 46 in an upper end wall 44 of the piston part 7, which is based on the longitudinal cross-section.

All the features disclosed are essential to the invention (individually, but also in combination with one another). The disclosure of the application hereby also includes the full content of the disclosure content of the associated / attached priority documents (copy of the previous application), also for the purpose of including features of these documents in the claims of the present application. The subclaims characterize, even without the features of a referenced claim, with their features independent inventive developments of the prior art, in particular special to make divisional applications on the basis of these claims. The invention specified in each claim can additionally have one or more of the features provided in the above description, in particular provided with reference numbers and / or specified in the list of reference numbers. The invention also relates to design forms in which some of the features mentioned in the preceding description are not implemented, in particular insofar as they are recognizable for the respective intended use or can be replaced by other technically equivalent means.

List of reference symbols

1 dispenser 30 locking connection

2 Storage container 31 locking bead

3 storage chamber 32 locking bead

4 follower piston 33 outer surface 5 head piece 34 inner surface

6 Dispenser pump 35 chamber wall

7 piston part 36 legs

8 piston 37 lead-in rounding

9 pot part 38 contact surface 10 cylinder section 39 locking groove

11 pumping chamber 40 locking groove

12 inlet channel 41 opposite contact surface

13 outlet channel 42 piston part wall

14 Entrance side VenÜl 43 interior

15 Outlet-side valve 44 End wall

16 reset device 45 airway

17 cup wall 46 opening

18 fastening projection 47 second interior

19 Annular gap a height

20 Annular gap b distance

21 BetäÜgungteil c radial extension

22 Dispensing channel r insertion direction

23 Dispensing mouth x longitudinal axis

24 actuating surface y parallel to the axis 25 wall of confirmation part

26 Cap M mass

27 Limiting device a angle 28 edge

29 bottom of the pot

Claims

Expectations

1. Dispenser (1) for dispensing flowable, for example liquid or pasty, masses (M), with a storage container (2) for receiving the mass (M), and a modular dispenser pump (6), the dispenser (1 ) has a longitudinal axis (x), the dispenser pump (6) also having an input and an output channel (12, 13) and an input and output channel (11) delimited by valves (14, 15) and a head piece ( 5), the head piece (5) having a dispensing orifice (23) and a dispensing channel (22), the dispenser pump (6) also being insertable into the storage container (2) and by a snap-in connection with the storage container (2) can be connected, the pump chamber (11) also being formed by a piston (8) and a pot part (9) which has a pot bottom (29) and a pot wall (17), the piston (8) in the pot part (9) is slidably received, to achieve a pump stroke (b), with further there s pot part (9) has outer wall beesÜgungsausformungen for

Fastening cooperation with an inner wall of the storage container (2), the locking connection (30) being reinforced in that the locking connection (30) based on a longitudinal cross-section through the dispenser (1) by two spaced in the vertical direction and radially externally protruding locking beads (31, 32) are given, characterized in that both locking beads (31, 32) on the storage container side are formed with an insertion curve (37), on the other hand, on the head piece side, based on the longitudinal cross section, with a substantially horizontally extending contact surface (38) ).

2. Dispenser according to claim 1, characterized in that the pot part (9) with the fastening formations for adaptation to different storage containers (2) is designed to be exchangeable.

3. Dispenser according to one of the preceding claims, characterized in that a return device arranged between the piston (8) and the pot part (9) is provided.

4. Dispenser according to one of the preceding claims, characterized in that limiting devices (27) for limiting a

Restoring movement, which limiting devices (27) come into contact with one another at a maximum pump chamber volume, are provided.

5. Dispenser according to one of the preceding claims, characterized in that the dispensing channel (22) can be introduced into the output channel (13) of the dispensing pump (6), with such a large insertion depth of the dispenser pump (6) in the storage container ( 2) it is given that a lower edge (43) of the dispenser pump (6) with its input channel (12) has direct contact with the dispensing material (M).

6. Dispenser according to one of the preceding claims, characterized in that the piston (8) cooperates with a piston part (7) for common processes and the return device (16) acts between the piston part (7) and the pot part (9).

7. Dispenser according to one of the preceding claims, characterized in that a suitable air path (45) avoids a pressure build-up with regard to an interior space formed by the pot part (9) and the piston part (7).

8. A dispenser according to claim 7, characterized in that the airway (45) is formed through an opening (46) in an upper end wall (44) of the piston part (7) which is given relative to the longitudinal cross-section.

9. Dispenser (1) for dispensing flowable, for example liquid or pasty masses (M), with a storage container (2) for receiving the

Mass (M), the dispenser (1) having a longitudinal axis (x), the dispenser pump (6) also having an input and output channel (12, 13) and an input and output side through valves (14, 15) Bounded pump chamber (11) and a head piece (5), wherein the head piece (5) has a dispensing orifice (23) and a dispensing channel (22), the pump chamber (11) further by a piston (8) and a pot part ( 9), which has a pot bottom (2944) and a pot wall (17), is formed, the piston (8) being slidably received in the pot part (9) to achieve a pumping stroke (b) and between one with the piston (8) connected to the piston part (7) and the bottom of the pot

(29, 44) a return spring (16) acts, wherein the piston part (7) has a plant cover on which the restoring spring (16) supported on the pot bottom (29, 44) rests and together with the pot part (9) a forms the first interior space, the volume of which changes when the pump is actuated, with the first interior space (43) from a second

Inner space (47) is surrounded, which is formed between the head piece (5) and the pot part (9) and the piston part (7), characterized in that an air path (45) is formed in the system ceiling to avoid a pressure build-up in the first Interior in the course of a pump actuation.

10. Dispenser according to claim 9, characterized in that the dispenser is designed in a modular design.

11. Dispenser according to one of claims 9 or 10, characterized in that the dispenser pump (6) can be inserted into the storage container (2) and can be connected by a latching connection with the storage container (2).

12. Dispenser according to claim 11, characterized in that the pot part (9) has fastening formations on the outer wall side, for fastening cooperation with an inner wall of the storage container (2).

13. Dispenser according to claim 12, characterized in that the rest connections (30) are reinforced in that, based on a longitudinal section through the dispenser (2), there are locking beads which are spaced apart in the vertical direction and project radially outward.

14. Dispenser according to one of claims 9 to 13, characterized in that the locking connections (30) according to the features of one of claims 1 to 8 is formed.