EP3079834B1 - Dispenser - Google Patents

Description

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

Such dispensers have already become known in various respects. It will be around on the DE-U1-20 2008 011 730 and the WO-A1-2012 / 126909 directed.

From the EP-B1-670275 It is known in terms of a pressure vessel to depress the dispenser head with an actuating lever, wherein rigidly coupled to the dispenser head, a valve closing the pressure chamber is thereby displaced into a release position and at the same time the closure piston is displaced into an open position.

From the JP 64-66475 A1 a dispenser is known in which a flexible and tubular closure member within a fixed tube, which has the outlet opening, is movable and squeezable by an actuating lever. Upon actuation, a tube member having a closure plate is moved into the pumping chamber, thereby opening the outlet valve of the pumping chamber. At one of the DE 10 2011 001 534 A1 Known dispenser is immediately spent in a first depression in the mass space depressed mass through the dispensing opening. Next is still on the state of the art on the DE 203 20 413 U1 to refer.

Starting from the JP 64-66475 A1 The invention is concerned with the task of achieving an advantageous donation characteristic.

This object is achieved in the subject matter of claim 1, wherein it is based on the fact that the outlet valve of the pumping chamber is rigidly coupled to the dispenser head and in an opening position in an operation in a first movement section of the dispenser head, in which already a release of the closure opening takes place is offset, for example, enters the pumping chamber, without causing a reduction in the pumping chamber incidentally, that the closure piston has at its proximal end, as seen from the distal end beyond the mouth of the connecting portion, a radially projecting with respect to the longitudinal axis of the closure piston Dichtausformung and at its distal end has a closure portion retracted into the dispensing opening in the closure state, and that the mass space formed between the sealing formation and the closure portion, which in any case is filled with mass after a first actuation of the dispenser, i n which then also filled with mass connecting portion opens in the first movement section of the dispenser head has a larger volume increase than corresponds to the volume of the same time flowing through the connecting portion mass. As a result of this larger increase in volume, the dispensing opening, that is to say at the distal end of the closure piston, results in a return suction of mass, since the otherwise caused negative pressure can only be compensated by the closure opening. It comes to a "suck back" effect, so that the dispensing opening is exposed before then, for example, in the course of further depressing the dispenser head mass is brought to the application.

Characterized in that the outlet valve is rigidly coupled to the dispenser head, it is directly coupled motion to movement of the dispenser head. It can therefore take place at the same time with an opening of the closure opening, a movement of the outlet valve of the pumping chamber in the open position. The opening of the closure opening is accompanied by a corresponding displacement of the closure piston. By only preferred provided displacement of the exhaust valve into the pumping chamber, it comes only to a possibly slight mass displacement in the connecting portion and thus the mass space, which can be absorbed by the displacement of the closure piston, so that it still does not come to a discharge of mass through the closure opening.

The user can thus put the donor in a donation readiness position, without at the same time there is a loss of mass, at least no substantial loss of mass. In addition, in the first in the first movement section of the dispenser head, there is a back suction effect on the dispensing opening.

The Dichtausformung can low limit the mass space in the axial direction. The closure portion, which is retractable into the closure opening, additionally provides an effective seal of the dispenser in the unactuated resting state.

It is further preferred that the mass space formed between the sealing formation and the closure portion, which is filled in any case after a first operation of the dispenser with mass, in which then also filled with mass connecting portion opens, in the first movement section of the dispenser head, in which the mentioned offset the exhaust valve of the pumping chamber is carried out in the pumping chamber but no compression of the pumping chamber has otherwise occurred, a greater volume increase than corresponds to the volume of the mass flowing simultaneously through the connecting portion.

It is also preferred that the closure portion is cylindrically shaped with respect to the longitudinal axis of the closure piston. The wall of the dispensing opening is preferably designed to be equally cylindrical. In the closed state, two cylinder bodies are in one another.

It is also preferred that the closure section has an extension section toward the proximal end of the closure piston, following a preferably cylindrically formed closure region to form a conical surface. The cylindrically shaped closure region, as indicated, is correspondingly preferably a smaller-diameter part of the closure piston, so that a relatively large press-in force can result from the spring application into the closure position here as well. Thus, any leftovers or encrustations in the dispensing opening can be effectively overcome by the process of the closure piston into the closed position.

It is also preferred that the conical surface in the closed state also bears sealingly against a correspondingly shaped inner surface of the dispensing head. As a result, the total sealing surface is favorably increased. In addition, there is correspondingly a diverting area from the cylindrical area into the conical area with respect to the adjacent areas in the closed state. There is a labyrinth effect supporting the tightness.

It is also preferable for a continuation section to be formed on the closure piston subsequent to the extension section, the outer surface of which, in the normal state of use of the dispenser in the closed state, delimiting a part of the mass space. It closes at least partially, possibly with the exception of guide portions which bear against a corresponding guide wall of the mass space, mass space through which the mass is guided in the course of dispensing or taken in the course of non-use is. The guide sections or an associated guide wall is preferably formed near the distal end of the closure piston. As a result of this or other measures, it is preferably achieved that during a movement, in particular a movement in the first movement section, movement of the closure piston takes place from the distal end beyond the mouth of the connecting section into the mass area a larger increase in volume of the mass space than in that of the said mouth seen as the distal end of the closure piston associated Masseraum.

In particular, it is preferred that, in the first movement section, a movement of, for example, 1 to 2 mm in a vertical direction downwards (with conventional use of the dispenser) of the dispenser head takes place. This can, for example, by a suitable slotted guide of the closure piston, as basically basically from the above-mentioned WO-A1-2012 / 126909 , to which reference is also made, it is achieved that about half of said path of the dispenser head is converted in the first movement section into a movement of the closure piston. Accordingly, the closure piston in this case perform a movement of about 0.5 to 1 mm.

It is further preferred that in the second movement section, the dispenser head performs a movement of 2 to 4 mm, but only a small part of this movement is then converted into a further movement of the closure piston in the direction of its proximal end along the longitudinal axis. For example, the proportion of the movement, which is then converted into a movement of the closure piston in the second movement section, can be 1/25 to 1/10 of the movement of the dispensing head in this second movement section.

Reverse conditions arise accordingly in a return movement of the dispenser head from the most depressed position back to the starting position. In this case, a movement of only the dispenser head initially takes place, with the outlet valve coupled thereto, which is accordingly moved into the closure position without the pump piston being moved or the pump chamber being increased again, at least not significantly. This is correspondingly associated with a movement of the closure piston in the direction of its longitudinal axis and in the direction of the distal end by a portion of the amount that the closure piston has (only) completed in the second movement section, with the same partial movement (based on the second movement section) of the Dispenser head to vertically above. Then follows a fourth movement section of the dispenser head, in which the vertical dimension of the remaining part of the second movement section and the measure of the first movement section in the reverse direction is passed through by the dispenser head.

The invention also relates, as a further subject matter, to a dispenser, in particular according to the features of the preamble of claim 1, but where, for example, it is not necessary, although preferred, that the connecting section runs at an acute angle to a longitudinal axis of the closure piston, wherein in that the closure piston is arranged in a receiving part and a pump piston forming the pumping chamber is arranged to be movable in a limited manner relative to the receiving part.

Furthermore, it can alternatively or additionally be provided that a pipe part having the flow-through opening is plug-connected to the receiving part. Also, the pipe part may enforce the pump piston preferably centrally. Furthermore, the pipe part can form a valve plate and / or a flow-through opening. In addition, the tube part can form a driving projection. It can further be provided that the pipe part is formed integrally with the valve plate and / or the flow openings and / or a driving projection.

Furthermore, one or more of the further described features can be realized in this article.

It is also preferred that an outer wall of the closure piston to form the mass space is surrounded by a Masseraumwandung the dispenser head over the length of the closure piston with a different radial distance. The mass space preferably does not have the same radial extent over the entire length. Rather, this can be different. It may also be different in relation to a vertical section with respect to a region above the closure piston or in the upper region of the closure piston and a region below the closure piston or in the lower region of the closure piston.

Fig. 1

einen Querschnitt durch den Spender, im oberen Bereich, im unbetätigten Zustand;

Fig. 2

eine Darstellung gemäß Figur 1, nach Durchfahren eines ersten Bewegungsabschnittes des Spenderkopfes;

Fig. 3

eine Herausvergrößerung aus Figur 2 im Bereich der Spendeöffnung;

Fig. 4

eine Darstellung des Spenders entsprechend Figur 1 nach Durchfahren eines zweiten Bewegungsabschnittes des Spenderkopfes beim Niederdrücken;

Fig. 5

eine Darstellung gemäß Figur 1 bzw. Figur 4, nach Einleitung einer Rückstellbewegung des Spenderkopfes und Durchfahren eines dritten Bewegungsabschnittes; und

Fig. 6

eine Darstellung gemäß Figur 1, zum Ende der Rückstellbewegung, bei noch geöffnetem Einlassventil.

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

Fig. 1

a cross section through the dispenser, in the upper area, in the unactuated state;

Fig. 2

a representation according to FIG. 1 after passing through a first movement section of the dispenser head;

Fig. 3

a zoom out FIG. 2 in the area of the donation opening;

Fig. 4

a representation of the donor accordingly FIG. 1 after passing through a second movement section of the dispenser head during depression;

Fig. 5

a representation according to FIG. 1 respectively. FIG. 4 after initiation of a return movement of the dispenser head and passing through a third movement section; and

Fig. 6

a representation according to FIG. 1 , to the end of the return movement, with the intake valve still open.

Shown and described is a dispenser 1, which is shown only in the upper area.

The dispenser serves to dispense liquid to pasty masses. For example, creams.

The dispenser has a dispenser head 2, a storage chamber 3 and a pumping chamber 4.

In the dispenser head 2, a dispensing opening 5 is formed, which can be closed by a closure piston 6 or released for donations.

The closure piston 6 has a distal end 7 and a proximal end 8.

In the dispenser head 2, a mass chamber 9 is further formed, in which mass the closure piston 6 surrounds and is held ready for dispensing. The mass space 9 is connected to the pumping chamber 4 via a connecting section 10, which may also be designated as a connecting line.

The pumping chamber 4 is bounded on the one hand by an inlet valve 11 which separates the pumping chamber 4 from the reservoir 3, and on the other hand by an outlet valve 12. The outlet valve 12 is rigidly coupled to the dispenser head 2, so that it can be moved in a relative movement of the dispenser head 2 to a fixed part of the dispenser, for example, the guide member 13, in an open position or a closed position.

The dispenser head 2 initially passes through a first movement section, which leads to a movement by the amount a, cf. FIGS. 1 and 2 , leads. This first movement section is characterized in that, although the outlet valve 12 of the pumping chamber 4 is moved into an open position, in which it is in the pumping chamber 4, as from a comparison of FIGS. 1 and 2 can be seen, immersed, but the pumping chamber 4, moreover, is not yet reduced. The dispenser head 2 passes through an idle stroke, in which only the outlet valve and the closure piston are acted upon.

In the exemplary embodiment, the pump chamber 4 is bounded on the one hand by a preferably fixed bottom part 14 and on the other hand by a pump piston 15 which can be moved by the dispenser head 2. The pump piston 15 is guided in a manner known per se by means of vertically spaced sealing lips on a stationary pump chamber wall of the dispenser.

On a second movement section, which results from a comparison of the Figures 2 and 4 results, and in which the dispenser head 2 then to the amount a by the amount b, see. FIG. 4 , is moved, the pump piston 15 - based on a conventional list of the donor in a dispensing operation - further moved vertically down, with the outlet valve 12 still open, so that the pumping chamber 4 is reduced and mass M is discharged from the dispensing opening 5, see , approximately FIG. 4 , A transition from the first to the second Motion section is also tactile for a user. The compression of the pumping chamber is associated with a noticeably higher resistance.

The dispenser head 2 consists in a further detail of a cap 34, in which the upper side of an actuating recess 16, for supporting about a finger of an actuating hand, is formed.

Within the dispenser head is fixedly arranged and formed in accordance with this movable a receiving part 17, in which the closure piston 6 is received to form the mass chamber 9. Further, in the preferably integrally formed receiving part 17 and the connecting portion 10 is formed.

The receiving part 17 has for the closure piston 6 guide portions, of which in the illustration a guide portion 18 can be seen.

In the receiving part 17, the outlet valve 12 of the pumping chamber 4 is further accommodated on the pumping chamber side or connected to it, preferably plug-retained.

In a third movement section, cf. FIGS. 4 and 5 , the dispenser head 2 again moves so far that the exhaust valve closes. The degree of movement corresponds to the measure a.

In further detail, the outlet valve 12 has a tubular plug-in portion 19, which in the following, where it does not depend on the plug-in function, but this may be given, is also referred to as a tube part, the pumping chamber side is limited by a valve effect providing the closure plate 20. The closure plate 20 is further preferably pump chamber side provided with driving projections 21. The driving projections 21 allow it, the pump piston 15 in a fourth movement section, which in the illustration of FIG. 6 is just gone through, from the position of FIG. 5 in the position of FIG. 6 lugging.

The outlet valve 12 further preferably has on the head side of the closure plate 20 one or more passage openings 22, through which in the opening state of the outlet valve 12 when reducing the pumping chamber 4 mass M from the pumping chamber 4 in the connecting portion 10, from there into the mass chamber 9 and finally to the outlet from the dispensing opening 5 is conveyed.

The passage openings 22 are preferably also formed in the, more preferably tubular, plug-in section 19. They occur upon actuation of the dispenser head 2 corresponding to the first movement section, see also Figure 2, in the board position, so that starting with this position of the outlet valve 12 in a further depression of the dispenser head 2 mass M from the pumping chamber 4 in the manner described in the Can flow connection section 10.

The receiving part 17 is guided in the already mentioned, in the assembled state housing-fixed guide member 13. For this purpose, the guide member 13 a preferably central and more preferably cylindrical guide opening 23, in which the receiving part 17 is retracted depending on the operating state and durchfahrenem movement section of different depths with a plug-in section adapted thereto.

The receiving part 17 is further supported against a bottom portion 24 of the guide member 13 via a return spring 25. The return spring 25 is compressed when passing through said movement sections of the dispenser head 2 or ensures the return of the dispenser head 2 in the starting position according to FIG. 1 ,

The receiving part 17 forms, preferably in its retracted into the guide member 13 area, on the one hand a larger diameter abutment portion 26 for the return spring 25 and further preferably on the other hand a smaller diameter, but more preferably a total cylindrical insertion portion 27 which received in a guide portion 28 of the guide member 13 is and is vertically movable in it.

In the guide portion 28, a guide projection 29 of the pump piston 15 is further included, which is also vertically movable herein. The guide projection 29 is also guided on the plug-in section 19.

After passing through the first movement section, as in FIG. 2 1, an end face of the entry section 27 comes into contact with a corresponding surface of the guide projection 29 of the pump piston 15 and thus presses the pump piston 15 vertically downwards as it traverses the second movement section, thereby correspondingly reducing the volume of the pumping chamber 4. The dimension a thus preferably corresponds to a distance between the entry section 27 (lower end face) given in the unactuated state of the dispenser and the associated surface of the pump piston, in this case in particular the guide projection 29.

The end face of the entry section 27 and / or the corresponding surface of the guide projection 29 of the pump piston 15 is preferably V-shaped in cross-section, widening radially outward with respect to a central axis A of the connection section 10.

The inlet valve 11 of the pumping chamber 4 is formed in the embodiment as a check valve. In detail, a plug part 30 is provided, which is seated in a plug-in opening 31 of the bottom area of the bottom part 14. ambient For this purpose, one or more passage openings 32 are formed, which are covered by a membrane part 33 enclosed between the bottom area of the bottom part 14 and the plug part 30.

In the course of a return movement of the pump piston 15 in the starting position, that is approximately from the position of FIG. 5 in the position of FIG. 6 , M mass is sucked from the storage space 3 through the inlet valve 11, taking the membrane 33 of the passage openings 32nd In FIG. 6 the state of the dispenser is shown at the end of this return movement. Merely for clarity, the inlet valve 11 is still shown in the open state.

The guide projection 29 of the pump piston 15 is visible on the one hand, radially outward, guided on the inner surface of a guide wall of the guide member 13, on the other hand, on the inside, on an outer surface of the plug portion 19. A guide on one of these parts may also be sufficient.

In reference to FIG. 3 the geometric design of the closure piston 6 in its distal end region can be seen in further detail.

The foremost part, the closure section 37, preferably has a cylindrical closure region 42. This is adjoined by a conical surface 38, with which the closure plug widens conically starting from the closure region 42. The conical surface 38 is followed by a continuation section 40. The continuation portion 40 is provided in the opening and closing state over its circumference with different radial distance to the Masseraumwandung 41 extending. Im - in relation to a usual utilization position - the upper area is obviously given a very small distance, in the lower area, however, a larger.

The cone surface 38 is in the closed state at an associated donor head surface 39.

As well as about FIG. 4 can be seen, the connecting portion 10 opens at the mouth 35 in the mass space 9. The closure piston 6 has at its proximal end to a radially projecting Dichtausformung 36, which cooperates sealingly with the surrounding Masseraumwandung 41.

A central axis A of the connecting section 10 encloses an acute angle α with a longitudinal axis L of the closing piston 6 (cf. FIG. 1 ). The angle α can be, for example, 10 ° to 85 °, wherein all mean values, in particular in whole degrees, are also included here in the disclosure.

The above explanations serve to explain the inventions as a whole covered by the application, which independently further develop the state of the art, at least by the following combinations of features, namely:
A dispenser, which is characterized in that the outlet valve 12 of the pumping chamber 4 is rigidly coupled to the dispenser head 2 and when actuated in a first movement section of the dispenser head 2, in which already a release of the closure opening 5, a movement into the open position takes place, for example, the exhaust valve 12 enters the pumping chamber 4, without causing a, in any case no significant, reduction of the pumping chamber 4 incidentally.

A dispenser characterized in that the closure piston 6 is at its proximal end, as viewed from the distal end beyond the mouth 35 of the connecting portion 10, a radially with respect to the longitudinal axis L of the closure piston 6 projecting Dichtausformung 36 and at its distal end has a retracted in the closed state in the dispensing opening 5 closure portion 37.

A dispenser, which is characterized in that the mass space 9 formed between the sealing formation 36 and the closure portion 37, which is filled in any case after a first actuation of the dispenser 1 with mass M, in which the then also filled with mass M connecting portion 10 opens, in the first movement section of the dispenser head 2 has a larger increase in volume than corresponds to the volume of the mass M flowing simultaneously through the connecting section 10.

A dispenser, which is characterized in that the closure section 37 has a closure region 42 which is cylindrically shaped with respect to the longitudinal axis L of the closure piston 6.

A dispenser, which is characterized in that the closure section 37 has an extension section toward the proximal end of the closure piston 6, following the closure region 42, forming a conical surface 38.

A dispenser, which is characterized in that the conical surface 38 in the closed state also sealingly against a correspondingly shaped dispenser head surface 39 abuts.

A dispenser, which is characterized in that subsequent to the extension section on the closure piston 6, a continuation section is formed whose outer surface limits a part of the mass space 9 when the dispenser is normally used in the closed state.

A dispenser, which is characterized in that an outer surface of the closure piston 6 for forming the mass space 9 is surrounded by a Masseraumwandung 41 of the dispensing head over the length of the closure piston 6 with a different radial distance.

A dispenser, which is characterized in that an outer surface of the closure piston 6 for forming the mass space 9 is surrounded by a Masseraumwandung 41 of the dispensing head over the circumference of the closure piston 6 with a different radial distance.

A dispenser, which is characterized in that the pump piston 15 is arranged relative to the receiving part 17 limited movement.

A dispenser, characterized in that the connection is given by means of a pipe part.

A dispenser which is characterized in that the pipe part having a flow-through opening is plug-connected to the receiving part 17.

A dispenser, which is characterized in that the tubular part passes through the pump piston.

A dispenser, which is characterized in that the tubular part penetrates the pump piston centrally.

A dispenser characterized in that the pipe part forms a valve plate.

A dispenser, which is characterized in that the pipe part forms flow openings.

A dispenser, which is characterized in that the tubular part forms a driving projection 21.

A dispenser, characterized in that the tube part is formed integrally with the valve plate.

Dispenser according to one of the preceding claims, characterized in that the tubular part is formed integrally with the flow-through openings.

A dispenser, which is characterized in that the tubular part is formed integrally with a driving projection 21.

A dispenser, which is characterized in that the closure part is designed as a closure piston 6. <B><u> REFERENCE LIST </ u></b> 1 donor 26 Counter storage area 2 dispenser head 27 entry section 3 pantry 28 guide section 4 pumping chamber 29 guide projection 5 dispensing opening 30 plug member 6 closure piston 31 plug-in opening 7 distal end 32 Port 8th proximal end 33 membrane part 9 mass Cube 34 cap 10 connecting portion 35 muzzle 11 intake valve 36 sealing formation 12 outlet valve 37 closure portion 13 guide part 38 conical surface 14 the bottom part 39 Dispenser head area 15 pump piston 40 continued section 16 actuating depression 41 Masseraumwandung 17 receiving part 42 closure portion 18 guide section 19 plug-in section a amount 20 closing plate b amount 21 driving projection a angle 22 Port A central axis 23 guide opening L longitudinal axis 24 floor area M Dimensions 25 Return spring

Claims (14)

1. A dispenser (1) for dispensing liquid to pasty masses, with a dispenser head (2) that can move under exposure to a spring force for dispensing mass (M), a storage chamber (3) and a pump chamber (4) exhibiting an inlet valve (11) and an outlet valve (12), wherein the dispenser head (2) incorporates a dispenser opening (5) and, in order to seal or release the dispenser opening (5), a closure piston (6) that can be moved in the direction of its longitudinal axis (L), exhibits a distal end allocated to the dispenser opening (5) and a proximal end, and is situated in a mass space (9) of the dispenser head (2), wherein a section (10) that connects the pump chamber (4) to the mass space (9) further empties into the mass space (9) between the distal and proximal end of the closure piston (6), wherein said connecting section (10) exhibits a central axis (A) that runs at a right or acute angle (α) relative to the longitudinal axis (L) of the closure piston (4) in a vertical section that is present during conventional usage of the dispenser (1), characterized in that the outlet valve (12) of the pump chamber (4) is rigidly coupled with the dispenser head (2), and, when actuated in a first movement segment of the dispenser head (2) that already involves a release of the closure opening (5), a movement into the open position takes place, for example the outlet valve (12) enters the pump chamber (4), without otherwise making the pump chamber (4) smaller, at least not significantly and that the proximal end of the closure piston (6), as viewed from the distal end beyond the orifice (35) of the connecting section (10), exhibits a sealing formation (36) that protrudes radially in relation to the longitudinal axis (L) of the closure piston (6), and that its distal end exhibits a sealing section (37) that is introduced into the dispenser opening (5) in the sealed state and that the mass space (9) formed between the sealing formation (36) and sealing section (37), which in any event is filled with mass (M) after the dispenser (1) is first actuated, into which the connecting section (10) then likewise filled with mass (M) empties, exhibits a greater increase in volume in the first movement segment of the dispenser head (2) than corresponds to the volume of the mass (M) that simultaneously continues to flow through the connecting section (10).
2. The dispenser according to claim 1, characterized in that the sealing section (37) exhibits a sealing area (42) that is cylindrically shaped relative to the longitudinal axis (L) of the closure piston (6).
3. The dispenser according to claim 2, characterized in that the sealing section (37) exhibits an expansion section toward the proximal end of the closure piston (6) adjoining the sealing area (42), with the formation of a conical surface (38).
4. The dispenser according to claim 3, characterized in that the conical surface (38) in the sealed state also tightly abuts against a correspondingly shaped dispenser head surface (39).
5. The dispenser according to one of claims 3 or 4, characterized in that the expansion section is followed by a continuation section formed on the closure piston (6), the outer surface of which borders part of the mass space (9) during conventional dispenser use in the sealed state.
6. The dispenser according to one of the preceding claims, characterized in that an outer surface of the closure piston (6) is enveloped by a mass space wall (41) of the dispenser head over the length of the closure piston (6) at a varying radial distance so as to form the mass space (9).
7. The dispenser according to claim 6, characterized in that an outer surface of the closure piston (6) is enveloped by a mass space wall (41) of the dispenser head over the periphery of the closure piston (6) at a varying radial distance so as to form the mass space (9).
8. The dispenser according to one of the preceding claims, characterized in that a pump piston (15) is provided and that the pump piston (15) is connected to the receiving part (17) by means of a pipe section.
9. The dispenser according to claim 8, characterized in that the pipe section passes through the pump piston (15).
10. The dispenser according to claim 9, characterized in that the pipe section centrally passes through the pump piston (15).
11. The dispenser according to one of claims 8 -10, characterized in that the pipe section forms a sealing plate (20).
12. The dispenser according to claim 8 - 11, characterized in that the pipe section exhibiting a flow-through opening (22) is plug-connected with the receiving part (17).
13. The dispenser according to one of claims 8 - 12, characterized in that the pipe section forms several flow-through openings (22).
14. The dispenser according to one of claims 8 - 13, characterized in that the pipe section forms an engaging projection (21).

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