EP3934814B1 - Dispenser for discharging flowable compounds - Google Patents

Description

field of technology

The invention relates to a dispenser according to the features of the preamble of claim 1 and the preamble of claim 2.

The invention also relates to a dispenser according to the features of the preamble of claim 10.

State of the art

A dispenser for dispensing flowable, for example liquid or pasty masses, is initially known from the EP 1 015 340 B1 The modular and interchangeable design provides a compact dispenser pump that can be used with a variety of dispensers that can be freely designed in their head piece and storage container. In addition, such dispensers are also referred to the DE 20 2008 011 730 U1 From the latter publication it is also known to provide an obtuse angle between a longitudinal axis of the guide and a longitudinal axis of the closure part in a dispenser which has a closure part guided by a slotted guide on a fixed dispenser part and thereby to set a desired movement characteristic with regard to different angles on different parts.

From the EP 1 460 001 A1 A dispenser with a pump chamber and a head piece is known, in which a variable distance can be set between the head piece and an upper exposed surface of a connecting part to the storage space, whereby pressing down the head piece is always The same extension height. From the JP 3 068 498 U A dispenser of this type is known in which a blocking part made of an elastic material can be clipped onto a free-standing connecting tube from the pump chamber to the pump head from the outside. When the blocking part is clipped on, the pump head can only be moved downwards by a smaller amount from the otherwise same extension height.

From the DE 10 2007 007 402 A1 A dispenser is known in which a fine adjustment of a pump stroke is possible, whereby the extension height of the head piece is maintained even when the pump stroke is changed. The limiting device acts between a wall and a cap cover of a protective cap of the dispenser. From the DE 297 17 036 A dispenser is known in which a changeable limiting device acts between a rotary actuating sleeve and an outer profile section.

Summary of the Invention

Based on the prior art presented, the invention is concerned with the task of specifying a dispenser for dispensing flowable, for example liquid or pasty, masses, in which a dispenser pump can advantageously be adjusted with regard to different dispensing quantities.

This object is initially achieved in the subject matter of claim 1, whereby the pot part has a pot base and a pot wall, whereby the pot base delimits the storage container towards the dispenser pump and the pot wall stands on the pot base on the head part side, optionally serving for a locking connection with the storage container, whereby the head piece has an actuating part and an actuating wall running concentrically to a longitudinal axis, whereby the actuating part on the outside of the wall via an actuating part wall through the pot wall of the pot part in the axial direction and that the limiting device acts between the pot base, if necessary on a replacement part connected to the pot base, or the pot wall, and the head piece, so that the head piece extends less far depending on the setting of the limiting device.

This object is further achieved in the subject matter of claim 2, wherein the limitation device consists of exchangeable parts which can be used selectively with regard to a desired pumping stroke and have different dimensions with regard to different pumping strokes.

This object is also achieved in the subject matter of claim 10, wherein the head piece further comprises an actuating part wall which runs concentrically to a longitudinal axis and via which an actuating part of the head piece is guided on the outside of the wall through the pot wall of the pot part in the axial direction, that a changeable limiting device is provided for the changeable limitation of the pump stroke, such that a limitation of the pump stroke can be achieved between a minimum possible pump stroke and a maximum possible pump stroke, wherein the maximum possible pump stroke can be variably limited, and that the dispenser is covered in a non-use position by a cap which is locked in place in the region of the pot wall, with axial support on the fastening projection.

It can also be provided that when the pump stroke changes from a smaller pump stroke to a larger pump stroke, the reset device adjusts the head piece.

If an adjustment device, such as a screw adjustment device, is provided, the head piece can automatically move into the further extended position when adjusting to a larger stroke thanks to the elastic return device, which is then the starting position for a subsequent pumping process. The same effect also occurs if a larger pumping stroke is set using just a replacement part.

Using the limiting device, the pump stroke of the piston, generally speaking, in the pot part and thus the amount of mass to be dispensed via the dispenser mouth can be adjusted during pumping. This makes it possible to limit the pump stroke between a minimum possible pump stroke, which in one possible embodiment of the limiting device can also be zero, and a maximum possible pump stroke, which is defined in particular by the limiting device described above. The dispenser as such is basically designed so that the piston can achieve a certain predetermined pump stroke. The limiting device serves to limit this maximum possible pump stroke, if necessary variably.

The pot part has a pot base and a pot wall. The pot wall preferably extends from the pot base to the head part. The pot base can limit the storage container towards the dispenser pump. The limiting device acts between the pot base or the pot wall and the head part. Another part, a replacement part, can be connected to the pot base.

Preferably, the mobility of the piston relative to the pot part is between a - with reference to a storage position of the dispenser on a Surface in which the longitudinal axis of the dispenser is aligned perpendicular to the surface - lowest piston position and an uppermost piston position displaced in the axial direction, each limited by the limiting devices. These limiting devices or at least one of these limiting devices can be changed to change the possible displacement path of the piston along the axis and thus to change the maximum possible pump stroke.

According to one embodiment, the limiting device which limits the pump stroke and can optionally be separately assigned or set can only enable a stroke limitation at all through a corresponding assignment. Alternatively, such a changeable limiting device is provided in addition to a device which generally limits a maximum possible pump stroke. The pump stroke can be reduced by means of the changeable limiting means compared to the maximum pump stroke defined by the limiting device which is generally present.

As a result of the above-described design, the dispenser can, for example, be factory-fitted with different settings or different designed limiting devices to limit the pump stroke. A limiting device that can be changed in principle can also be provided, which also allows the user to change the pump stroke if necessary.

Furthermore, according to a further possible embodiment, a changeable limiting device can be used as a transport lock for the dispenser, in particular in such an embodiment in which a pumping stroke is prevented.

Further features of the invention are often explained, also in the description of the figures, in their preferred association with the subject matter of claim 1 or with features of further claims. However, they can also be important in an association with only individual features of claim 1 or the respective further claim, or in each case independently.

Furthermore, the limiting device can consist of interchangeable parts which can be used optionally with regard to a desired pumping stroke and which have different dimensions with regard to different pumping strokes.

To achieve a desired pump stroke, corresponding to a desired maximum displacement of the piston along the longitudinal axis, an adapted limiting device can be inserted or attached as a replacement part. In this case, for example, a limiting device as a replacement part can represent a transport lock for the dispenser, in particular the dispenser head, which limiting device does not allow a pump stroke, accordingly holding the piston preferably in its lowest, preferably stop-limited position.

In addition, further limiting devices can be provided as replacement parts, which can be arranged, for example, in place of the limiting device described above, which represents a transport lock, for example, and further limiting devices, for example, which allow 0.25 or 0.5 or, furthermore, 0.75 times the maximum pump stroke. Any other limiting value between zero and the maximum stroke can also be set using corresponding limiting devices.

The limiting devices can be fixed as replacement parts, for example on the pot part of the dispenser, for example as a result of a screw connection or a snap-in connection.

In one possible embodiment, the limiting device can interact directly with the dispenser head to limit the stop, which dispenser head interacts with the piston and the piston part for joint movement. Accordingly, according to another embodiment, the limiting device can also interact directly with the piston or the piston part, for example. Each replacement part defines a possible pump stroke.

The limiting device can also consist of an adjustment part. This can be part of the dispenser, in particular not without tools, and also not non-destructively removable. The adjustment part allows a larger pump stroke in a first adjustment position than in a second adjustment position. Accordingly, in a preferred embodiment, the adjustment part is designed for the essentially different arrangement of the element that essentially acts as a limiting device along the longitudinal axis. of the dispenser. This means that different pump strokes can be set with just one adjustment part.

In one possible embodiment, the adjustability of the adjustment part can only be made possible at the factory when configuring the dispenser or the dispenser head, whereby a position of the adjustment part found thereafter can be virtually frozen, for example as a result of a corresponding locking, gluing or, if necessary, partial welding to a section of the dispenser head or the pot part that cannot be moved relative to the adjustment part.

In addition, according to a possible embodiment, the adjustment part can also be adjustable by the user in daily use in order to enable different pump strokes as required, up to and including the prevention of a pump stroke, for example to achieve transport security.

In one possible embodiment, the adjustment part can be designed to be slide-displaceable along the longitudinal axis alone. In a further embodiment, several fixing stages can be provided over the maximum possible slide-displacement path, for example by forming a latch.

In a preferred embodiment, the adjustment part is adjustable as a result of a screw thread, whereby as a result of a screw movement, the adjustment part is moved along the longitudinal axis with its section that essentially influences the pump stroke limitation. This section ultimately interacts with a counter-stop, in particular of the dispenser head.

The adjustment part can interact directly with the dispenser head or a section of the piston or piston part that is movably connected to the dispenser head. Alternatively, the adjustment part can also interact with a stop part that is linearly guided on the adjustment part in the direction of the longitudinal axis of the dispenser. As a result of this linear guidance, a rotary movement of the adjustment part or the dispenser head about the longitudinal axis can lead to a linear displacement of the stop part along the longitudinal axis. This also enables an adjustment of the pump stroke, preferably between a transport safety position and a maximum stroke.

The stop part can cooperate with the head part in terms of thread, whereby according to one possible embodiment the stop part engages with a radially inward-pointing external thread in a correspondingly shaped internal thread of the head part. Alternatively, a pin or the like protruding radially inwards on the stop part side can also engage in the internal thread on the head part side.

In a further embodiment, the head piece can be rotationally coupled to the adjustment part, so that by grasping the exposed head piece and rotating it relative to the storage container, a change in the possible pump stroke can be brought about.

The adjustment part can cooperate with the pot part by means of a thread. A rotation of the head piece around the longitudinal axis can thus lead to a superimposed displacement of the adjustment part along the longitudinal axis, to a change in the stop for the head piece and thus to a change in the pump stroke. A (superimposed) linear displacement to change the pump stroke is preferably experienced by the adjustment part alone. With such a design, the head piece remains in linear motion during the change in the pump stroke. Direction along the longitudinal axis preferably remains unchanged, so that even with such a change in the orientation of the limiting device, no mass escape occurs.

Short description of the drawings

Fig. 1

einen Spender in einem Längsschnitt, betreffend eine erste Stellung einer änderbaren Begrenzungsvorrichtung in einer ersten Ausführungsform;

Fig. 2

die Herausvergrößerung des Bereiches II in Figur 1;

Fig. 3

eine der Figur 1 entsprechende Darstellung, jedoch eine zweite Stellung der änderbaren Begrenzungsvorrichtung betreffend;

Fig. 4

eine der Figur 1 entsprechende Darstellung, betreffend eine zweite Ausführungsform;

Fig. 5

die Herausvergrößerung des Bereiches V in Figur 4;

Fig. 6

den Spender gemäß Figur 4 in einer zweiten Stellung der Begrenzungsvorrichtung;

Fig. 7

eine weitere der Figur 1 entsprechende Darstellung, betreffend eine dritte Ausführungsform;

Fig. 8

die Herausvergrößerung des Bereiches VIII in Figur 7;

Fig. 9

den Spender gemäß Figur 7 mit einer geänderten Begrenzungsvorrichtung;

Fig. 10

eine vierte Ausführungsform in einer Darstellung gemäß Figur 1;

Fig. 11

die Herausvergrößerung des Bereiches XI in Figur 10;

Fig. 12

den Spender gemäß Figur 10 in einer geänderten Stellung der Begrenzungsvorrichtung;

Fig. 13

in einer fünften Ausführungsform einen Spender gemäß der Darstellung in Figur 1;

Fig. 14

die Herausvergrößerung des Bereiches XIV in Figur 13;

Fig. 15

eine der Figur 14 entsprechende Ausschnittvergrößerung, betreffend die Anordnung einer geänderten Begrenzungsvorrichtung;

Fig. 16

eine der Figur 1 im Wesentlichen entsprechende Darstellung, betreffend eine weitere Ausführungsform in einer ersten Stellung;

Fig. 17

eine Ausschnittvergrößerung des Bereiches XVII in Figur 16;

Fig. 18

eine der Figur 16 entsprechende Darstellung, jedoch betreffend eine zweite Stellung der änderbaren Begrenzungsvorrichtung;

Fig. 19

die Ausschnittdarstellung des Bereichs XIX in Figur 18;

Fig. 20

einen Spender einer weiteren Ausführungsform in einem Längsschnitt, betreffend eine erste Stellung der änderbaren Begrenzungsrichtung;

Fig. 21

die vergrößerte Darstellung des Bereichs XXI in Figur 20 nach Abnahme einer Kappe;

Fig. 22

eine der Figur 21 entsprechende Darstellung, betreffend eine zweite Stellung der Begrenzungsvorrichtung;

Fig. 23

eine weitere der Figur 21 entsprechende Darstellung, jedoch eine weitere Ausführungsform betreffend;

Fig. 24

die Ausführungsform gemäß Figur 23, bei Ausrichtung der Begrenzungsvorrichtung in einer zweiten Stellung.

The invention is explained below with reference to the attached drawing, which, however, only shows exemplary embodiments. A part which is only explained in relation to one of the exemplary embodiments and is not replaced by another part in a further exemplary embodiment due to the special feature highlighted there, is therefore also described for this further exemplary embodiment as a possible existing example. The drawing shows:

Fig. 1

a dispenser in a longitudinal section, relating to a first position of a changeable limiting device in a first embodiment;

Fig. 2

the enlargement of area II in Figure 1 ;

Fig. 3

one of the Figure 1 corresponding representation, but concerning a second position of the variable limiting device;

Fig. 4

one of the Figure 1 corresponding representation concerning a second embodiment;

Fig. 5

the enlargement of area V in Figure 4 ;

Fig. 6

the donor according to Figure 4 in a second position of the limiting device;

Fig. 7

another of the Figure 1 corresponding representation concerning a third embodiment;

Fig. 8

the enlargement of area VIII in Figure 7 ;

Fig. 9

the donor according to Figure 7 with a modified limiting device;

Fig. 10

a fourth embodiment in a representation according to Figure 1 ;

Fig. 11

the enlargement of area XI in Figure 10 ;

Fig. 12

the donor according to Figure 10 in a changed position of the limiting device;

Fig. 13

In a fifth embodiment, a dispenser as shown in Figure 1 ;

Fig. 14

the enlargement of area XIV in Figure 13 ;

Fig. 15

one of the Figure 14 corresponding detail enlargement concerning the arrangement of a modified limiting device;

Fig. 16

one of the Figure 1 essentially corresponding representation, concerning a further embodiment in a first position;

Fig. 17

an enlarged detail of area XVII in Figure 16 ;

Fig. 18

one of the Figure 16 corresponding representation, but concerning a second position of the variable limiting device;

Fig. 19

the detail representation of area XIX in Figure 18 ;

Fig. 20

a dispenser of a further embodiment in a longitudinal section, relating to a first position of the changeable limiting direction;

Fig. 21

the enlarged view of area XXI in Figure 20 after removing a cap;

Fig. 22

one of the Figure 21 corresponding representation concerning a second position of the limiting device;

Fig. 23

another of the Figure 21 corresponding representation, but concerning a further embodiment;

Fig. 24

the embodiment according to Figure 23 , with the limiting device aligned in a second position.

Description of the embodiments

Shown and described is, firstly, with reference to Figure 1 , a dispenser 1 for arrangement on a storage container 2.

The storage container 2 is designed in the illustrated embodiments as a preferably substantially cylindrical body, with a optionally central longitudinal axis x, which in the corresponding assignment position also passes through the dispenser 1 preferably in the form of a rotation axis.

The storage container 2 can have a storage chamber 3 for receiving a mass M to be dispensed. This storage chamber 3 can be limited at the bottom by a follow-up piston 4.

The dispenser 1 can be inserted into the opening of the storage container 2, which opening points upwards in a normal setup state of the storage container 2, and can be fastened to the storage container 2.

The dispenser 1 essentially consists of a head piece 5 and a dispenser pump 6.

The dispenser pump 6 initially has a pump part P, here preferably in the form of a piston body 7 with a piston 8, and more preferably a pot part 9 with a pot bottom 44 and preferably a cylinder section 10. The piston 8 is slidably received along the longitudinal axis x in the cylinder section 10, a pump chamber 11 being formed between the piston 8 and the cylinder section 10 and further delimited by the pot bottom 44 of the pot part 9.

The pot part 9 is preferably designed to be interchangeable in order to adapt 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 inlet channel 12 and an outlet channel 13, wherein both channels can be separated from the pump chamber 11 by an inlet-side valve 14 and an outlet-side valve 15.

The two valves 14 and 15, which are preferably designed as check valves, are preferably installed in such a way that they open in the same direction, i.e. in the dispensing direction.

A return device 16 exerting an elastic force, preferably in the form of a cylinder spring, is arranged between the piston part 7 and the cylinder section 10. This can usually be a metal cylinder spring. Alternatively, a spring made of a plastic material with a corresponding elastic recovery capacity can also be provided here to create an all-plastic dispenser.

The return device 16 is further preferably arranged such that it is supported at one end on the pot base 44 in a preferably concentric arrangement to the longitudinal axis x and at the other end acts against the head piece 5, here preferably provided by 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, during which the pump chamber volume is reduced.

The piston part 7 and the pot part 9 are each preferably essentially pot-shaped. They can engage with one another and together limit the dispenser pump 6 to the outside, so that a capsule-like housing is formed. At least one fastening projection 18 can be provided on a radial pot wall 17 of the pot part 9, which can also be designed as a ring projection, for example. This fastening projection 18 can serve 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 non-actuated state, as shown throughout the figures, the head piece 5 has an extension height H. This extension height H can be measured, for example, from a lower stop surface F for the piston part 7 in the depressed state. By changing the limiting device for limiting the pump stroke b, a correspondingly lower extension height H' results, as is the case, for example, in Figure 1 A change in the pump stroke b therefore corresponds directly to a change in the extension height H.

Due to the elastically designed return device 16, for example by the cylinder spring already mentioned and shown in some of the embodiments, but also by the elastic boundary wall 59 in the embodiment of the Figure 24 For example, when the pump stroke b is adjusted from a smaller pump stroke b to a larger pump stroke b, the return device 16 adjusts the head piece 5. The adjustment is provided practically directly by the elastic pressure force, for example, exerted by the aforementioned cylinder spring or the membrane 50. Accordingly, the extension height H is automatically increased.

As can be seen further, the limiting device 27 acts between the pot part 9 and the head piece 5. In the embodiment of the Figure 1 the effect is given between a pot wall 17 and the head part 5, likewise in the embodiment of the Figure 7 or the Figure 12 . In the embodiment of the Figure 13 The effect is actually given between a replacement part 37 connected to a pot base 44 and the head piece 5, whereby the replacement part 37, as shown, can be attached to an upwardly projecting cylinder section of the pot base. In the embodiment of the Figure 16 For example, the limiting device 27 acts between an inner surface of the outer pot wall and a stop surface for the head piece formed on the adjustment part guided thereon, as described in detail below.

A similar solution is also available for the embodiment of the Figure 20 given, as described in detail below.

In the embodiments shown, the valves 14 and 15 are designed as so-called annular gap valves with a ring-like valve body, which each covers an annular gap 19 or 20 of the inlet or outlet channel 12, 13.

The radially symmetrical design of the dispenser pump 6 results in homogeneous dispensing behavior. However, the dispenser pump is not limited to radially symmetrical designs, but can also have any cross-section, for example square or polygonal. 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 formed 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 is connected to the dispenser pump 3 and has a dome-like actuating part 21 with a dispensing channel 22 and a dispensing mouth 23, as well as an actuating surface 24 formed on the upper side, preferably transversely to the longitudinal axis x, and an actuating part wall 25 which may be concentric with the longitudinal axis x.

The actuating part 21 is guided, preferably circumferentially on the outside of the wall, via its actuating part wall 25 through the pot wall 17 of the pot part 9 in the axial direction.

The dispensing channel 22, which in the illustrated embodiments initially receives the longitudinal axis x in the middle of its longitudinal extension, is with reference to a cross-sectional view in which the longitudinal axis x is shown as a line, for example according to Figure 1 with a preferably obtuse angle to the longitudinal axis x and opens into the dispensing outlet 23. The dispensing channel 22 is inserted in a sealing manner into the outlet channel 13, whereby in the use position the piston 8, the piston part 7 and the dispensing channel 22 together with the actuating part 21 cooperate for joint movement along the longitudinal axis x. Accordingly, the entire head piece 5 with the piston 8 fixed to it is supported via the return device 16.

When the dispenser pump 6 or the dispenser 1 as a whole is inserted into the storage container 2, a lower edge 43 of the dispenser pump 6 with its inlet channel 12 dips so deeply into the storage container 2 and thus into the mass M stored there that there is direct contact with the mass M to be dispensed. When the dispenser 1 is placed on the storage container 2, the mass M can thus spread out into the pump chamber 11 for the first filling thereof, preferably through the inlet valve 14 which opens during the exposure to pressure.

As further shown in Figure 4 As can be seen, 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, 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 spaced from the pot part 9. This can be used, for example, in the Figures 1 and 2 The limit position shown is the position of maximum filling of the pump chamber 11.

Preferably, a limitation of the displaceability is also provided in the opposite direction upon corresponding pressure actuation of the head piece 5 with downward movement of the same in the direction of the pot part 9, which defines the lowest piston position and thus the smallest pump chamber volume.

The limiting device 27 of all embodiments shown in the drawings can be changed to variably limit the resulting pump stroke b, in particular with regard to the movement limitation of the head piece 12 with the piston 8 in the relaxation direction of the return device 16 and thus in the direction of a maximum pump chamber volume defined thereby. Alternatively or in combination with this, the lowering movement of the head piece 5 in the course of dispensing mass M via the dispensing mouth 23 can also be changed in its limitation, whereby the usable pump chamber volume can also be changed between the two defined positions of the piston 8 in the pump chamber 11.

For this purpose, the limiting device 27 can initially consist of an adjustment part 28, which, as shown in the Figures 1 to 3 according to a first embodiment on the outside of the pot wall 17 preferably above the fastening projection 18 interacts with the head piece 5. The adjustment part 28 is essentially ring-shaped, preferably concentric to the longitudinal axis x and interacts with a radially inward-pointing external thread 29 with a radially outward-pointing internal thread in the region of the pot wall 17. With regard to the internal thread 30, it can be a two-stage thread, for example.

The adjustment part 28 projects beyond the upwardly facing edge section of the pot part 9 and forms a radially inwardly projecting collar 31 in the region of its free end. This collar surrounds the actuating part wall 25 of the head piece 5 and rests on a support collar 32 formed on the actuating part wall 25 and projecting radially outward.

The basic position viewed in the direction of relaxation of the return device 16 according to Figure 1 , which corresponds to the suction position of mass M into the pump chamber 11, is thus limited by the support collar 32 striking the underside of the collar 31.

This results, as can be seen from the Figures 1 and 2 visible, a pump stroke b, which is defined by the free path of the support collar 32 between the collar 31 of the adjusting part 28 and the facing annular end face of the pot wall 17.

In Figure 3 a modified position of the adjusting part 28 is shown, in which the adjusting part 28 is rotated about the longitudinal axis x, which, as a result of the thread engagement described above, causes the adjusting part 28 to be lowered in the direction of the fastening projection 18 of the pot part 9. In Figure 3 a position of the adjusting part 28 is shown in which the adjusting part 28 is in a lowest position, which corresponds to the transport position of the head piece 5. The support collar 32 is here bound between the collar 31 of the adjustment part 28 and the pot wall 17. The pump stroke b' here corresponds to approximately zero, so that the adjustment part 28 in this illustration can be used as a transport lock for the dispenser 1.

Between the Figures 2 and 3 Any intermediate position of the adjusting part 28 can be adopted in order to change the pump stroke b between a pump stroke corresponding to zero and a maximum pump stroke. The adjusting part 28 can, for example, be secured in different rotational positions in order to fix the pump stroke found.

In an alternative configuration as shown in the Figures 4 to 6 the adjustment part 28 can also be arranged on the inside of the pot wall 17 between this pot wall 17 and the actuating part wall 25. The thread arrangement is accordingly provided on the inside with respect to the pot part 9. The function for changing the pump stroke b' corresponds to that of the first embodiment, whereby in Figure 6 a pump stroke b' is set which is greater than zero, but smaller than the pump stroke b according to the position in the Figures 4 and 5 .

Also, according to the illustrations in the Figures 7 to 9 an adjustment part 28 is arranged in an annular groove 33 provided on the outside of the pot wall 12 so as to be rotatable about the longitudinal axis x. In this embodiment, a stop part 34 is arranged in the annular space resulting between the front surface of the pot wall 17 and the lower surface of the adjustment part-side collar 31 and the adjustment part wall. According to the illustrations, this can be essentially annular and extend around the longitudinal axis x. However, one or more stop parts 34 can also be arranged distributed over the circumference.

The stop part 34 is guided linearly on the adjustment part 28 in the direction of the longitudinal axis x, for which purpose, in the embodiment shown, a guide web 35 directed in the direction of the longitudinal axis x is formed on the inside of the wall of the distribution part 28. This engages in a correspondingly shaped guide groove 36 of the stop part 34 (see in particular Figure 8 ). A reverse design is also possible in this respect, whereby a web on the stop part side is guided in a groove on the adjustment part side.

In a ring-shaped design, the stop part 34 is provided with an external thread 29 that projects radially inwards. In an arrangement of a plurality of stop parts 34 distributed over the circumference, these can alternatively have projections that project radially inwards.

The external thread 29 or the projections engage in an internal thread 30 recessed on the outside of the actuating part wall 25.

A rotation of the adjusting part 28 about the longitudinal axis x, preferably carried out by hand, leads to a linear dragging of the stop part 34 as a result of the thread engagement, whereby a change in the pump stroke b can also be achieved as a result of this design.

In this embodiment, too, the Figures 7 and 8 a maximum pump stroke b is set via the adjustment part 28 and in Figure 9 a minimum pump stroke b', which here as in the first embodiment can be approximately equal to zero, so that even using this embodiment, for example, a transport lock can be achieved.

Also, every intermediate position and correspondingly every pump stroke between the maximum pump stroke according to the Figures 7 and 8 and the pump stroke corresponding to zero according to Figure 9 is adjustable.

The Figures 10 to 15 show two embodiments in which the modification of the limiting device 27 is possible by means of replacement parts 37.

According to the illustrations in the Figures 10 to 12 a generally approximately ring-shaped replacement part 37 is provided, which can be clipped into an annular groove 33 on the outside of the pot wall 17, for example. A collar 31 protruding freely over the annular end face of the pot wall 17 and projecting radially inwards interacts with a support collar 32 projecting radially outwards in the area of the actuating part wall 25 of the head piece 5 to limit the stop, so that a Figure 11 apparent pump stroke b results. The free front surface of the pot wall 17 forms the lower limit for the displacement of the head piece 5 together with the piston 8.

In Figure 12 an arrangement is shown in which a with respect to the extension length in the direction of the longitudinal axis x compared to the Figure 10 shown replacement part 37 is arranged, with a length a' viewed in the axial direction, which is clearly shorter than the length a of the in Figure 10 used replacement part 37.

As a result of the shorter length a', a correspondingly reduced pump stroke b' results (compare Figure 12 ).

In addition, a pump stroke limitation, preferably a limitation in both directions, can also be achieved by means of the interaction of limiting devices 27 between the piston part wall 38 and a guide wall 39 of the pot part 9 which surrounds it circumferentially. In this way, an internal limitation of the pump stroke can be achieved which is not generally recognizable from the outside. For this purpose, the piston part wall 38 can have a projection 40 on the outside of the wall which dips into a groove 41 formed on the inside of the guide wall 39. The axial length of the groove 41 defines the maximum possible pump stroke b.

According to the embodiment shown, the guide wall 39, in particular the section 42 of the guide wall 39 having the groove 41, is designed as a replacement part 37 and can be assigned to a stump of the pot-part-side guide wall 39. Here, for example, a clip or screw connection can be provided.

The Figures 14 and 15 show two corresponding replacement parts 37 or sections 42 with different lengths of the grooves 41 viewed in the axial direction for setting different pump strokes b and b'.

This also enables a simple adjustment of the pump stroke as a result of the corresponding arrangement of a replacement part 37 within the dispenser 1.

The Figures 16 to 19 show a further embodiment in which the limiting device 27 is similar to that shown in the Figures 4 to 6 illustrated embodiment is designed as an annular adjustment part 28 and is positioned between the actuating part wall 25 of the head piece 5 and the wall of the head part 9 which circumferentially surrounds this actuating part wall 25.

The adjusting part 28 also interacts here with an internal thread 30 in the area of the pot part wall 17.

Furthermore, the adjustment part 28 is rotationally coupled to the head piece 5, so that a rotation of the head piece relative to the storage container 2 about the longitudinal axis x results in a linear displacement of the adjustment part 28 along the longitudinal axis x due to the rotational coupling and the threaded engagement of the adjustment part 28 on the pot part 9.

The rotary coupling can be achieved due to radially inwardly projecting driving ribs 46 formed on the inside of the adjustment part wall 45, which engage in associated slot openings 47 aligned in the axial direction in the region of the actuating part wall 25.

The driving ribs 46 can, as also shown, at the same time provide a stop for the head piece 5 in the course of a downward pressure displacement of the head piece 5 for dispensing a portioned mass M, for example, as also shown further, due to interaction with the surface 48 of the actuating part wall 25 delimiting the slot opening 47.

In the Figures 16 and 17 the adjustment part 28 is brought into a stop-limited first (lower) position. This stop limitation can, as also shown, be provided by the formation of a stop step on the pot part 9. The second (upper) position is also preferred (see Figures 18 and 19 ) limited by stops.

The first (lower) position according to the Figures 16 and 17 is, according to the embodiment, the position in which a maximum pump stroke b can be achieved. The surface 48 of the slot opening 47 is in a non-actuated rest position of the head piece 5 axially spaced from the facing end face of the driving rib 46 of the adjusting part 28.

The Figures 18 and 19 The second (upper) position shown can, as also shown, be a position in which no pump stroke or only a minimal pump stroke b' is permitted. The adjustment part 28 is displaced axially upwards via the thread so far that the surface 48 of the slot opening 47 on the head piece side has no or only a minimal distance to the facing stop surface of the driving rib 46. This position can also serve as a transport position.

By rotating the head piece 5, any intermediate position of the limiting device 27, in particular between the first and the second position, can be adopted for the preferred stepless adjustment of the dispensing quantity of the mass M.

As can be seen from the illustrations, the adjustment part wall 45 emerges with a reduction of the pump stroke due to adjustment of the limiting device 27 from an almost given hidden position in the first (lower) position according to the Figures 16 and 17 into a position that protrudes freely axially beyond the facing upper edge of the pot part wall. This can also be used to provide a scale or the like on the outside of the actuating part wall 25. Using the upwardly facing free edge 49 of the adjusting part 28, this scale can be read in the non-actuated basic position of the head piece 5.

The Figures 20 to 24 show dispensers 1 with a limiting device 27, in which the pump part P is essentially designed in the manner of a membrane 50.

The pot part 9 can centrally form a double-walled plug-in receptacle 51 with a central pot-like elevation in whose pot cover 52 an inlet opening 53 is formed.

The pump chamber 11 is provided between the storage chamber 3 and the head piece 5 for the portioned dispensing of mass M. This extends particularly in the first position (starting position) of the Figures 20 to 22 illustrated first embodiment essentially above the plug-in receptacle 51 of the pot part 9.

Further with reference to the embodiment according to the Figures 20 to 22 the pump chamber 11 can be delimited circumferentially to the longitudinal axis x at least over a vertical partial section by a radially inner side wall 54 of the head piece 5, as well as on the ceiling side by a ceiling section 55 which, like the side wall 54, is formed in one piece and of the same material as the head piece 5.

A further peripheral boundary, which essentially adjoins the side wall 54 vertically downwards, as well as a vertically lower boundary of the pump chamber 11 is preferably provided by a spring element 56 formed by the membrane 50.

In this embodiment, the dispensing channel 22 can be connected to the pump chamber 11 via an outlet opening 57 formed in the side wall 54.

The spring element 56 described above can, as is also preferred, be an injection-molded part made of a thermoplastic elastomer, optionally consisting of silicone.

The spring element 56 is initially with respect to an unloaded position, which more preferably corresponds to the first position or the starting position according to the Figures 20 and 21 can correspond, shaped like a plate, with a plate base which in the starting position forms a leg 58 which runs essentially horizontally in vertical section. This horizontally aligned leg 58 preferably merges in the region of its radially outer end in a uniform and one-piece manner into a curve which is directed vertically upwards in relation to the drawings, which further merges into an upward leg which is aligned at least approximately vertically. This upward leg forms the further boundary wall 59 for the pump chamber 11, correspondingly circumferentially to the longitudinal axis x.

The boundary wall 59 merges into a holding projection 60 in the vertically upper region facing away from the curvature. This can, as also shown, be accommodated in a groove-like holding receptacle 61 formed in the head piece 5 running around the longitudinal axis x and open vertically downwards. The holding projection 60 can, as is also preferred, be held in the holding receptacle 61 in a form-fitting and/or friction-fitting manner.

An annular plug projection 62 extends vertically downwards from the leg 58, which essentially forms the plate bottom of the spring element 56 and runs horizontally in vertical section. This engages in a holding manner in the groove-like plug receptacle 51 of the pot part 9.

Both the holding projection 60 and the plug-in projection 62 can, as is also preferred, be formed in one piece and from the same material as the plate-shaped spring element section. In addition, a valve section 63 for forming the outlet-side valve 15 and a valve plug 64 for forming the inlet-side valve 14 can also be provided in one piece and from the same material.

The valve section 63 can be formed in a tab-like manner in the region of an axially upper end of the holding projection 60. This valve section 63 enters the dispensing channel 22 through a provided opening and lies sealingly in front of the outlet opening 57 in the valve closed position.

The valve plug 64 is connected via webs 65 to the area of the leg 58 which runs horizontally in the initial position and closes the inlet opening 53 like a valve in the initial position.

The Figures 23 and 24 show an embodiment in which the pump part P is also designed as a membrane 50. In this embodiment, the mounting projection 60 of the spring element 56 is held in particular by a radially outer contact on the side wall 54 of the head piece 5. The mounting receptacle 61 is essentially provided by the side wall 54.

The support projection 60 can have a support surface 66 that is exposed vertically upwards. On this support surface 66, a projection that is bead-like in cross section and concentric to the longitudinal axis x can be formed, for preferred interaction with a Lip section 67 of the head piece 5, for forming the outlet-side valve 15.

The lip section 67 can essentially be designed as a flat part that extends essentially horizontally, in particular in an unloaded pre-assembly position. In this case, as is also preferred, the lip section 67 can be formed in one piece and from the same material on a plug-in part 68 arranged on the head piece 5, which is held on the underside of the actuating surface 24 on the head piece 5.

In both embodiments of the representations in the Figures 20 to 24 By linearly moving the head piece 5 downwards along the longitudinal axis x relative to the storage container 2, a reduction in the volume of the pump chamber 11 can be achieved and thus, by opening the respective outlet-side valve 15, a portioned mass output can be achieved via the dispensing channel 22 and the dispensing mouth 23.

These two embodiments are preferably provided with a limiting device 27. A limiting device 27 is shown according to the Figures 16 to 19 In addition, the embodiments shown in the other Figures 1 to 15 illustrated limiting devices 27 in a dispenser 1 according to the embodiments in the Figures 20 to 24 applicable.

Accordingly, here too, an annular adjustment part 28 is provided between the actuating part wall 25 of the head piece 5 and the pot part wall 17 circumferentially enclosing this actuating part wall 25.

Furthermore, the adjustment part 28 is rotationally coupled to the head piece 5, so that a rotation of the head piece relative to the storage container 2 about the longitudinal axis x results in a linear displacement of the adjustment part 28 along the longitudinal axis x.

In the Figures 20 , 21 and 23 the adjusting part 28 is moved into a stop-limited first (lower) position. This is preferably the position in which a maximum pump stroke b can be achieved.

The Figures 22 and 24 The second (upper) position shown in each case can, as also shown, be a position in which no pump stroke or only a minimal pump stroke b' is permitted. The adjustment part 28 is displaced axially upwards accordingly for this purpose. This position can also serve as a transport position. <b><u>List of reference symbols</u></b> 1 donors 40 projection 2 storage container 41 Nut 3 storage chamber 42 Section 4 follower piston 43 edge 5 headpiece 44 bottom of the pot 6 dispenser pump 45 adjustable part wall 7 piston part 46 driving rib 8 Pistons 47 slot opening 9 pot part 48 Area 10 cylinder section 49 edge 11 pump chamber 50 membrane 12 input channel 51 plug-in socket 13 output channel 52 pot cover 14 inlet-side valve 53 inlet opening 15 outlet-side valve 54 side wall 16 reset device 55 ceiling section 17 pot wall 56 spring element 18 mounting projection 57 outlet opening 19 annular gap 58 leg 20 annular gap 59 boundary wall 21 operating part 60 mounting projection 22 donation channel 61 bracket mount 23 donation mouth 62 plug projection 24 actuation surface 63 valve section 25 actuating part wall 64 valve plug 26 cap 65 web 27 limiting device 66 support surface 28 adjustment part 67 lip section 29 external thread 68 plug-in part 30 internal thread 31 collar a,a' length 32 support collar b,b' pump stroke 33 ring groove x longitudinal axis 34 stop part F stop surface 35 guide bridge H,H' extension height 36 guide groove M mass 37 replacement part P pump part 38 piston part wall 39 guide wall

Claims (11)

1. A dispenser (1) for discharging flowable compounds (M) such as liquid or pasty compounds, wherein said dispenser comprises a reservoir (2) for accommodating the compound (M) and a dispensing pump (6), wherein the dispenser (1) has a longitudinal axis (x), wherein the dispensing pump (6) furthermore has an inflow channel and an outflow channel (12, 13) and a pumping chamber (11), which is delimited by valves (14, 15) on the inflow side and the outflow side, as well as a head piece (5), wherein the head piece (5) has a dispensing opening (23), wherein a pumping part (P) can be moved relative to a cup part (9) against an elastic force of a restoring device (16) in order to achieve a pumping stroke (b), wherein the head piece (5) is motion-coupled with the pumping part (P) such that a motion of the head piece (5) from a completely depressed position to an attainable extension height corresponds to the pumping stroke (b), and wherein a variable limiting device (27) furthermore is provided for variably limiting the pumping stroke (b), wherein the cup part (9) has a cup bottom (44) and a cup wall (17), wherein the cup bottom (44) delimits the reservoir (2) toward the dispensing pump (6) and the cup wall (17) stands on the cup bottom (44) on the side of the head part and optionally serves for producing a snap-fit connection with the reservoir (2), characterized in that a change of the pumping stroke (b) corresponds to a change of the extension height, in that the head piece (5) has an actuating part (21) and an actuating wall (25) running concentrically around a longitudinal axis (x), the actuating part (21) being guided on the outside of the wall via an actuating part wall (25) through the cup wall (17) of the cup part (9) in the axial direction, and in that the limiting device (27) acts between the cup bottom (44) or the cup wall (17) and the head piece (5), so that the head piece (5) extends less far depending on the setting of the limiting device (27).
2. A dispenser (1) for discharging flowable compounds (M) such as liquid or pasty compounds, wherein said dispenser comprises a reservoir (2) for accommodating the compound (M) and a dispensing pump (6), wherein the dispenser (1) has a longitudinal axis (x), wherein the dispensing pump (6) furthermore has an inflow channel and an outflow channel (12, 13) and a pumping chamber (11), which is delimited by valves (14, 15) on the inflow side and the outflow side, as well as a head piece (5), wherein the head piece (5) has a dispensing opening (23), wherein a pumping part (P) can be moved relative to a cup part (9) against an elastic force of a restoring device (16) in order to achieve a pumping stroke (b), wherein the head piece (5) is motion-coupled with the pumping part (P) such that a motion of the head piece (5) from a completely depressed position to an attainable extension height corresponds to the pumping stroke (b), and wherein a variable limiting device (27) furthermore is provided for variably limiting the pumping stroke (b) and a change of the pumping stroke (b) corresponds to a change of the extension height, characterized in that the limiting device (27) consists of exchange parts (37), which can be used selectively in order to realize a desired pumping stroke (b) and have different dimensions in order to realize different pumping strokes (b).
3. The dispenser according to claim 2, characterized in that the cup part (9) has a cup bottom (44) and a cup wall (17), wherein the cup bottom (44) delimits the reservoir (2) toward the dispensing pump (6) and the cup wall (17) stands on the cup bottom (44) on the side of the head part and optionally serves for producing a snap-fit connection with the reservoir (2), and in that the limiting device (27) acts between the cup bottom (44), optionally on an exchange part (37) that is connected to the cup bottom (44), or the cup wall (17) and the head piece (5).
4. The dispenser according to one of the preceding claims, characterized in that the restoring device (16) repositions the head piece (5) during a change of the pumping stroke (b) from a smaller pumping stroke (b) to a greater pumping stroke (b).
5. The dispenser according to claim 1, characterized in that the limiting device (27) consists of an adjusting part (28), which in a first adjustment position allows a greater pumping stroke than in a second adjustment position.
6. The dispenser according to claim 5, characterized in that the adjusting part (28) interacts with a stopping part (34), which is linearly guided on the adjusting part (28) in the direction of the longitudinal axis (x) of the dispenser (11).
7. The dispenser according to claim 6, characterized in that the stopping part (34) interacts with the head piece in a threaded manner.
8. The dispenser according to one of preceding claims 5 to 7, characterized in that the head piece (5) is rotationally coupled with the adjusting part (28).
9. The dispenser according to claim 8, characterized in that the adjusting part (28) interacts with the cup part (9) in a threaded manner.
10. A dispenser (1) for discharging flowable compounds (M) such as liquid or pasty compounds, wherein said dispenser comprises a reservoir (2) for accommodating the compound (M) and a dispensing pump (6) with a modular design, wherein the dispenser (1) has a longitudinal axis (x), wherein the dispensing pump (6) furthermore has an inflow channel and an outflow channel (12, 13) and a pumping chamber (11), which is delimited by valves (14, 15) on the inflow side and the outflow side, as well as a head piece (5), wherein the head piece (5) has a dispensing opening (23), wherein the dispensing pump (6) furthermore can be inserted into the reservoir (2) and in the process connected to the reservoir (2) by means of a snap-fit connection, wherein the pumping chamber (11) furthermore is formed by a piston (8) and a cup part (9), which has a cup bottom (44) and a cup wall (17), wherein the piston (8) is accommodated in the cup part (9) in a slidable manner in order to achieve a pumping stroke (b), wherein the cup part (9) furthermore has on its outer wall fastening formations for fastening interaction with an inner wall of the reservoir (2), wherein the cup part (9) with the fastening formations is in addition realized in an exchangeable manner in order to be adapted to different reservoirs (2), wherein a fastening projection (18) is provided on a radial cup wall (17) of the cup part (9) in order to fix the position of the dispensing pump (6) in the installed state between the head piece (5) and the reservoir (2), wherein a restoring device (16) arranged between the piston (8) and the cup part (9) and limiting devices (27) for limiting a restoring motion furthermore are provided, wherein said limiting devices (27) come in contact with one another at a maximum pumping chamber volume, wherein the head piece (5) furthermore can be attached to the dispensing pump (6) in an exchangeable manner and has the dispensing opening (23) and a dispensing channel (22), wherein the dispensing channel (22) can be inserted into the outflow channel (13) of the dispensing pump (6), and wherein an insertion depth of the dispensing pump (6) into the reservoir (2) furthermore is so large that a lower edge (43) of the dispensing pump (6) with its inflow channel (12) is in direct contact with the compound (M) to be dispensed, characterized in that the head piece (5) further has an actuating part wall (25) which runs concentrically around a longitudinal axis (x) and via which an actuating part (21) of the head piece (5) is guided on the outside of the wall through the cup wall (17) of the cup part (9) in the axial direction, that a variable limiting device (27) is provided for variably limiting the pumping stroke (b) in such a way that a limitation of this pumping stroke between a minimally possible pumping stroke and a maximally possible pumping stroke can be achieved, wherein the maximally possible pumping stroke can be variably limited, and in that the dispenser is in a non-usage position covered by a cap (26), which is fixed in the region of the cup wall (17) in a snap-fitted manner while being axially supported on the fastening projection (18).
11. The dispenser (1) according to claim 10, characterized in that the restoring device (16) directly repositions the head piece (5) due to an elastic pressing force during an adjustment from a smaller to a greater pumping stroke (b), wherein an increased extension height (H) is automatically adjusted.

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