Dispenser for liquid to pasty compositions

Abstract

A dispenser for liquid to pasty compositions has a pump chamber receiving a pump piston arranged on a pump piston part, a pump chamber with an inlet valve and an outlet valve, a storage space, and a dispenser head, wherein the dispenser head is vertically movable in order to discharge composition in the usual position of the dispenser. A discharge channel is formed in the dispenser head, and the dispenser head has a head cover and the outlet valve has a clamped, flexible annular part. A projecting structure of the head cover directed towards the pump chamber serves to retain the annular part. The dispenser can also have two storage spaces and two pump chambers and two dispenser heads which can be actuated independently of each other in order to discharge the composition.

Claims

1. A dispenser (1) for liquid to pasty compositions (M), comprising a pump chamber (8), accommodating a pump piston (32) arranged on a pump piston part, said pump chamber (8) having an inlet valve (9) and an outlet valve (10), a storage space (4) and a dispenser head (12), wherein the dispenser head (12) is vertically movable for dispensing the composition (M) in the usual dispenser position, wherein additionally a dispensing channel (37) is formed in the dispenser head (12), wherein additionally the dispenser head (12) has a head cover (35), and the outlet valve (10) has a clamped flexible annular part (51), and further comprising a holder part (41) on an end of the pump chamber for the outlet valve (10) and a holder part (22) on an end of the storage space for the inlet valve (9), wherein each of the holder parts has a journal (31, 48) extending toward the head cover (35) in the installed state, passing centrally through the annular part (51) provided in the outlet valve (10) as well as an annular part (30) provided in the inlet valve (9), and wherein the two holder parts (22, 41) have an annular space (28, 47) that is open toward a bottom in the installed state starting from a holder part cover (23, 42) having the journal (31, 48).

2. The dispenser according to claim 1, wherein the annular part (51) of the outlet valve (10) is directly opposite the head cover (35) for a part of its top side and/or the space (39) between the annular part (51) and the composition (M) which has passed through the outlet valve (10) flows through the head cover essentially at a right angle to a flow-through direction in the pump chamber (8).

3. The dispenser according to claim 1, wherein the pump chamber (8) has an upper cylindrical section (43), which is moved by the dispenser head (12) and is bordered by a pump chamber cover, having flow-through openings (49) to the annular part (51), and wherein an outside diameter of the annular part (51) exceeds an inside diameter of the cylindrical section (43) and/or wherein an inner cylindrical section (27, 46) forming the annular space (28, 47) has locking bead formations (50) on an inside of the two holder parts (22, 41).

4. The dispenser according to claim 1, wherein an outer cylindrical section (24, 43) of the two holder parts (22, 41) forming an outside wall of the annular space (28, 47) has a horizontally protruding peripheral edge (26, 45) on a lower side and/or wherein the two holder parts (22, 41) are designed to be identical in shape.

5. The dispenser according to claim 1, wherein the shape (40) of the head cover (35) facing the pump chamber (8) serves to hold the annular part (51).

6. A dispenser (1) for liquid to pasty compositions (M), comprising two storage spaces (4) and two pump chambers (8) and two dispenser heads (12) that are configured to be operated independently of one another for dispensing the composition (M), wherein each dispenser head (12) has a head cover (35), an outlet valve (10), an inlet valve (9) and a dispenser head wall (57) which forms an outside surface and is guided in correspondence with and relative to a fixed part (55) of the dispenser (1) and is movable relative thereto, wherein the dispenser head wall (57) of one of the two dispenser heads (12) is guided and is movable on a portion of its circumference relative to the dispenser head wall (57) of the other dispenser head (12), and each dispenser head wall (57) has a straight wall section (58) in the area in which it is movable in relation to the fixed part (55) of the dispenser (1), the straight wall section having a cross-section that extends in a direction perpendicular to the direction of operation of the dispenser head (12), and further comprising a holder part (41) on an end of each of the pump chambers for the outlet valve (10) and a holder part (22) on an end of each of the storage spaces for the inlet valve (9), wherein each of the holder parts has a journal (31, 48) extending toward the head cover (35) in the installed state, passing centrally through an annular part (30, 51) provided in the outlet valve (10) as well as in the inlet valve (9), and wherein the two holder parts (22, 41) have an annular space (28, 47) that is open toward a bottom in the installed state starting from a holder part cover (23, 42) having the journal (31, 48).

7. The dispenser according to claim 6, wherein one of the dispenser heads (12) has a dispensing opening (38) configured for dispensing the composition (M) in a dispensing direction essentially at a right angle to the direction of operation of the dispenser head (12) and/or wherein the pump chambers (8) each have a central axis (x) running in a direction of operation (r) of the dispenser heads (12), and wherein in a cross section in which the two central axes (x) of the pump chambers (8) are at the greatest distance from one another, the dispensing openings (38) projected into this cross section are arranged with an offset to both central axes (x) and with an offset from one another and wherein the offset is in relation to the straight wall section (58) of the dispenser head wall (57).

8. A dispenser (1) for liquid to pasty compositions, comprising two storage spaces (4) and two pump chambers (8) and two dispenser heads (12) that can be operated independently of one another for dispensing the composition (M), wherein a follower piston (6) which is arranged in each storage space (4) has a shape (52) facing the pump chamber (8) for insertion into a connecting opening of the pump chamber (8) on the storage space end, wherein a pump chamber (8) has a central axis (x) running in the direction of operation (r) of the dispenser head (12) and the shapes (52) are designed eccentrically with respect to each follower piston (6) in a cross section in which the two central axes (x) of the pump chambers (8) area the greatest distance apart from one another.

9. The dispenser according to claim 8, wherein at least one of the follower pistons (6) has an outline with a bordering edge that is partially straight and partially curved.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is explained in greater detail on the basis of the accompanying drawings, although they represent only embodiments. A part that is explained only with reference to one of the embodiments and is not replaced by another part in another embodiment because of the particular feature presented there is thus also described as a part that is at any rate possibly present in this additional embodiment. In the drawings:

(2) FIG. 1 shows a dispenser in a frontal view, pertaining to a first embodiment;

(3) FIG. 2 shows the section along line II-II in FIG. 1;

(4) FIG. 3 shows the enlargement of the region III in FIG. 2;

(5) FIG. 4 shows a holder part of the dispenser in an individual side view;

(6) FIG. 5 shows the top view hereto;

(7) FIG. 6 shows the section along VI-VI in FIG. 5;

(8) FIG. 7 shows a dispenser in a frontal view in a second embodiment;

(9) FIG. 8 shows the top view hereto;

(10) FIG. 9 shows a side view toward the dispenser;

(11) FIG. 10 shows the dispenser in a perspective diagram;

(12) FIG. 11 shows the section according to line XI-XI in FIG. 9;

(13) FIG. 12 shows the enlargement of the region XII in FIG. 11;

(14) FIG. 13 shows the section according to line XIII-XIII in FIG. 12;

(15) FIG. 14 shows the section according to line XIV-XIV in FIG. 11;

(16) FIG. 15 shows the section according to line XV-XV in FIG. 12.

DESCRIPTION OF EMBODIMENTS

(17) A first embodiment of a dispenser 1 is illustrated and described, first with respect to FIGS. 1 through 6.

(18) Dispenser 1 is comprised essentially of a hollow cylindrical storage container 2 with a discharge head 3 coupled to it such that said discharge head in the out-of-use position illustrated here may be covered by a cap (not shown).

(19) The molded parts of the dispenser 1 consist primarily of a plastic material such as polyethylene, for example, and are preferably manufactured by the plastic injection molding process. Important exceptions with the embodiments illustrated here at any rate include valves which may be made of a rubbery material which may in fact be a thermoplastic elastomer (and, to this extent, may also be used in the injection molding process) but may preferably also be vulcanized in this embodiment. In addition, a restoring spring 11 which is a metal spring is provided.

(20) The storage container 2 offers a storage space 4 and has a container bottom 5 that is essentially closed (except for a vent hole). The container opening points in the direction of the discharge head 3.

(21) A follower piston 6, by means of which the composition M to be discharged is delivered in the direction of the discharge head 3, is positioned in the storage space 4 and can be moved by the vacuum.

(22) The discharge head 3 is comprised essentially of a pot-shaped lower part 7, which forms a partition with respect to the storage container and/or to the storage space 4, a pump chamber 8 having an inlet valve 9 and an outlet valve 10 and a dispenser head 12 supported on a restoring spring 11.

(23) The lower part 7, the pump chamber 8, the restoring spring 11 and an outside wall 13 of the dispenser head 12 may be arranged on a common axis x in a rotationally symmetrical arrangement, said axis optionally also forming the physical axis of the storage container 2.

(24) The lower part bottom 14 of the lower part 7 has a central pot section 15, which is retracted in the direction of the dispenser head 12 and is preferably concentric with the axis x. The pot cover 16 thereby established at a distance from the plane of extent of the lower part bottom 14 in the axial direction supports the pump chamber wall 18, which runs concentrically with the axis x at the top side, i.e., facing away from the pot wall 17. The pump chamber wall is freely enclosed by the restoring spring 11, which is supported at the base on the pot cover 16.

(25) A mandrel 19 protrudes centrally out of the pot cover 16 along the axis x enclosed by the pump chamber wall 18. This mandrel 19 may have a length along the axis x adapted to the pump chamber wall 18 starting from the pot cover 16.

(26) The average diameter of the mandrel 19 may correspond approximately to one quarter to one-sixth of the inside diameter of the pump chamber 8.

(27) Flow-through openings 20 for the composition M are formed in the pot cover 16 along a circular line radially outside of the root region of the mandrel 19 on the pot cover 16. These flow-through openings 20 extend between the mandrel 19 and the pump chamber wall 18 in a region of the pot cover 16.

(28) At the lower side, i.e., facing away from the mandrel 19, a locking receptacle section 21 directed downward in the direction of the storage space 4 is integrally molded on the pot cover 16. The locking receptacle section protrudes accordingly into the pot opening in the pot section 15.

(29) A lower holding part 22 is secured in the pot section 15. This holding part is preferably designed in the shape of a pot, having a pot cover 23, which is spaced a distance away from the facing lower surface of the pot cover 16 of the lower part 7 in the arrangement position approximately by the axial dimension of the catch receiving section 21.

(30) The circular cylindrical section 24 adjacent to the holding part cover 23 on the lower side may have catch bead formations 25 on the outside of the wall for locking interaction with the pot wall 17.

(31) The cylindrical section 24 develops into a horizontally protruding peripheral edge 26 at the base, i.e., facing away from the holder part cover 23. The peripheral edge is supported on the lower part bottom 14 at the lower side.

(32) In addition, an inner cylindrical section 27, which is preferably in the shape of a ring in the basic outline and forms, together with the outer cylindrical section 24, an annular space 28 that is open at the bottom is also integrally molded on the holder part cover 23.

(33) In the transition region from the inner cylindrical section 27 to the holder part cover 23, flow-through openings 29 are formed along a circular line peripherally with respect to a basic outline of the holder part cover 23. These flow-through openings are covered by a flexible annular part 30, which essentially forms a shape in the outlet valve 9.

(34) The annular part 30 has a journal 31, which is integrally molded on the holder part cover 23 on the top side passing through it centrally, said journal optionally being held with a catch in the locking receptacle section 21 of the lower part 7.

(35) The annular part 30 is clamped between the holder part 22 and the lower part 7. The peripheral region of the annular part 30 on the outside radially may unfold in a flexible manner for opening the valve in the usual way.

(36) A pump piston 32, which is held movably in the axial direction, is arranged in the pump chamber 8 and slides in the usual way with peripheral sealing lips along the inside of the pump chamber wall 18.

(37) The pump piston 32 is provided with a piston neck 33 in the form of a hollow cylinder, extending starting from the pump piston 32 in a direction pointing away from the lower part 7 in the axial direction.

(38) The dispenser head 12 with its outer wall 13 is relatively displaceable in the axial direction with respect to the lower part 7, which is attached to the storage container 2 and is twisted with it, for example.

(39) The dispenser head 12 has an impact surface 34 on the outside of a head cover 35 for operation of the dispenser head on the top side.

(40) A receptacle cylinder 36 with an inside diameter corresponding to the inside diameter of the pot section 15 on the lower part side preferably extends coaxially with the axis x on the inside of the head cover 35. The axial length of the receptacle cylinder 36 may essentially also correspond to that of the pot section 15.

(41) Starting from the receptacle cylinder 36, a discharge channel 37 extends directly from the head cover 35 at the lower side. This discharge channel ends in a discharge opening 38 on the wall side.

(42) The discharge channel 37 opens in a central space 39 facing away from the discharge opening 38.

(43) Protruding from the head cover 35 at the bottom, an essentially annular shape 40 extends into the space 39. It preferably accommodates the axis x centrally.

(44) Another holder part 41 is held with a catch in the receptacle cylinder 36 of the dispenser head 12. This holder part is preferably identical in shape to the lower holder part 22 and therefore has a holder part cover 42, an outer cylindrical section 43, an outer catch formation 44, an edge 45 and an inner cylindrical section 46. The two cylindrical sections 43 and 46 delimit an annular space 47. At the top side of the cover, a journal 48 is also integrally molded on this holder part 41. The flow-through openings 49 passing through the holder part cover 42 surround this journal.

(45) The holder part 41 is held with a catch on the receptacle cylinder 36 by means of the catch formations 44 on the outside of the wall. The edge 45 here is supported on the free peripheral end face of the receptacle cylinder 36 and also offers upper support for the restoring spring 11 in the usual dispenser position.

(46) The piston neck 23 is inserted radially inward into the inner cylindrical section 46 where it cooperates with catch bead formations 50 shaped on the inside of the inner cylindrical section 46. Such inner catch bead formations 50 are also provided with the lower holder part 22.

(47) The journal 48 on the holder part end is inserted into the shape 40 on the head cover end and thereby passes through a flexible annular part 51 essentially forming the outlet valve 10. This annular part 51 is thus held between the holder part 41 and the shape 40. The annular part 51 covers the flow-through openings 49 with its radially overlapping region.

(48) The region of the annular part 51 not covered by the shape 40 of the annular part 51, with its top side sits directly opposite the head cover 35. The space 39 thus extends in this region alone limited at the top side and lower side by the head cover 35 and the annular part 51.

(49) In addition, the top side of the annular part 51 may extend approximately on a plane which intersects or is tangent to the discharge channel 37 in the lower region vertically.

(50) The outside diameter of the annular part 51 may be chosen to be larger than the inside diameter of the inner cylindrical section 46. Thus, the diameter of the annular part 51 may correspond to 1.5 to 2.5 times the inside diameter of the cylindrical section, additionally 2 times the inside diameter of the cylindrical section, for example.

(51) The follower piston 6 arranged in the storage space 4 has a shape 52, preferably central and directed in the direction of the discharge head 3. It is designed on the whole in the shape of a dome, extending accordingly in the direction of travel of the piston beyond a piston bottom into the storage space 4.

(52) The shape 52 may have a cylindrical section 53 with an annular outline on the outside radially and a pot 54 on the inside radially with a pot wall and a pot cover.

(53) The shape 52 is designed and suitable for insertion into a connecting opening on the storage space end, preferably offered by the lower holder part 22. When the follower piston 6 is raised completely, the cylindrical section 53 is inserted into the annular space 28 in this regard, and the pot 54 is inserted into the space of the holder part 22 formed by the inner cylindrical section 27.

(54) In addition, the bottom of the follower piston 6 is additionally preferably adapted to the facing contour of the lower part 7.

(55) The residual amount of composition M is thus reduced to a minimum when the follower piston 6 is completely raised.

(56) The functioning of the dispenser 1 is known to the extent that a proportional amount of pasty composition M is discharged by the pump movement of the dispenser head 12 and the change from vacuum to excess pressure associated therewith.

(57) In particular due to the arrangement of the outlet valve 10 outside of, specifically above the pump chamber 8, a reduction in the diameter of the pump chamber 8 is made possible in the case of a sufficient diameter of the annular part 51 in this regard. A comparatively small proportion of composition M can thus be discharged with a conventional tangible stroke (distance of the dispenser head 12). The central mandrel 19 protruding into the pump chamber 8 contributes additionally to the reduction in the volume of the pump chamber.

(58) Due to pressure acting on the dispenser head 12 and associated with that a downward displacement (fastening opening r) of same, an excess pressure is created in the pump chamber 8, as a result of which the portion stored in this pump chamber 8 can escape through the opened outlet valve 10 and the discharge channel 37. The inlet valve 9 is closed because of the excess pressure.

(59) The composition M, having previously passed through the outlet valve 10, flows through the space 39 between the annular part 51 and the head cover 35 essentially at a right angle to the flow-through direction inside the pump chamber 8. Thus, the discharge channel 37 is additionally oriented essentially at a right angle to the axis x with respect to a vertical section according to FIG. 3.

(60) FIGS. 7 through 15 show a second embodiment of the dispenser 1 which is designed as a double dispenser, having two storage spaces 4, two discharge heads 3 with dispenser heads 12 and two follower pistons 6. The arrangement and design of the equipment of the discharge heads 3 such as the pump chamber 8, pump piston 32, the holder parts 22 and 41 and the design of the inlet and outlet valves 9, 10 correspond to the design described above, so that reference is herewith made to the full content of the disclosure in this regard.

(61) The storage spaces 4 are formed by a shared fixed part 55. It may have a circular outline according to FIG. 14, with two partitions 56 running like a secant on both sides of a dispenser axis y.

(62) The fixed part 55 is connected to a lower part 7 of the discharge head 3. Said lower part 7 preferably bridges the two storage spaces 4 in one piece on the opening end.

(63) The lower part 7 supports the respective pump chamber wall and a central mandrel 19 protruding into the pump chamber wall 18, each associated with a dispenser head 12.

(64) In the area of a respective pot wall 17 on the lower side, the lower holder part 22 is locked with the intermediate connection of the annular part 30 on the inlet valve end.

(65) Each dispenser head 1 has on the lower side a receiving cylinder 36a locking hold of the upper holder part 41. Here again, an annular part 51 is held between a holder part 41 and the head cover 35 to form the outlet valve 10.

(66) The dispenser heads 12 can be displaced linearly in the direction of extent of the axis y independently of one another with corresponding entrainment of the respective pump piston 32. It is thus possible for the composition stored in the respective storage space 4 to be discharged by downward displacement and/or actuation of just one dispenser head 12. It is also possible to have simultaneous actuation of the two dispenser heads 12.

(67) The dispenser heads 12 have an essentially semicircular contour with respect to an outline according to FIG. 8, with a dispenser head wall 57 running along a semicircular line and a wall section 58 running at least approximately along a radial line to the dispenser axis y. The wall sections 58 of the two dispenser heads 12 may be in contact with one another and are thus guided in relation to one another and are movable in the axial direction of the dispenser 1.

(68) In addition, there may be a guide of the dispenser heads 12 on the fixed part 55, for example, due to guide blocks 59 traversing the plane of separation between the straight-line wall sections 58, said guide blocks engaging in corresponding indentations in the wall sections 58.

(69) The axes x of each dispenser head 12, along which axes x the parts on the dispenser head end, such as the pump chamber and the holder parts as well as the inlet valves and outlet valves are arranged, lie on a line that may run at a right angle to a plane of separation of the dispenser heads 12 between the straight-line wall sections 58 with respect to a cross section according to FIG. 15. In addition, the dispenser axis y passing through the fixed part 55 centrally also preferably lies on this line connecting the axis x.

(70) The axes x may be situated here at equal distances from the dispenser axis y.

(71) Above the outlet valve 10, in particular above the annular part 51 there is a space 39 which is an approximately annular space on the whole and from which the respective discharge channel 37 branches out tangentially, this annular space being situated between the annular part 51 and the lower side of the head cover 35.

(72) With respect to the cross-sectional diagram in FIG. 13, the result is a preferred parallel orientation of the discharge channels 37 to one another and to the straight-line wall sections 58 of the dispenser heads 12.

(73) In addition, the discharge channels 37 are arranged in such a way that their discharge openings 38 are arranged with an offset in the direction of the straight-line wall sections 58 with respect to the axes x. Accordingly, a clearance between the discharge openings 38, considered transversely to the axes x, is selected to be smaller than the clearance of the axes x relative to one another as seen in the same direction.

(74) The follower piston 6 in each storage space 4 has an outlying contour according to FIG. 14 with a bordering edge oriented partially on a straight line and running in particular along the partition 56 of the fixed part 55 and with a curved bordering edge with a curvature dimension adapted to the inside radius of the fixed part 55.

(75) The shape 52 on the piston end is arranged eccentrically to the piston surface according to the lower holder part 22 arranged on the axis x, in particular in an extension of the axis x on the dispenser head end. The eccentricity here is based on the distance of the axis x from the bordering edges of the follower piston 6 connecting the axes x and intersecting the line running transversely to the axes x, based on a distance of the axis x from the bordering edges. This distance is greater in relation to the outer curved bordering edge than to the inner bordering edge, which is straight and/or less curved. The ratio in this regard may be 2:1 or 1.5:1.

(76) The preceding discussion is used to illustrate the inventions covered on the whole by the present patent application, each independently also improving upon the state of the art at least through the following combinations of features, namely:

(77) A dispenser, which is characterized in that a shape 40 of the head cover 35 facing the pump chamber 8 is used to hold the annular part 51.

(78) A dispenser, which is characterized in that a holder part 22, 41 on the pump chamber end and the storage space end has one journal 31, 48 each for the outlet valve 10 and/or the inlet valve 9 protruding in the installed state toward the head cover 35, passing centrally through an annular part 30, 51 provided on the outlet valve 10 as well as on the inlet valve 9, and the two holder parts 22, 41 have an annular space 28, 47 that is open toward the bottom in the installed state, starting from a holder part cover 23, 42 having journals 31, 48.

(79) A dispenser, which is characterized in that the annular part 51 of the outlet valve 10 is situated directly opposite the head cover 35 on a part of the top side.

(80) A dispenser, which is characterized in that the space 39 between the annular part 51 and the head cover 35 has composition M which had passed through the outlet valve 10 flowing through it essentially at a right angle to the flow-through direction in the pump chamber 8.

(81) A dispenser, which is characterized in that the pump chamber 8 has an upper cylindrical section 43 moved by the dispenser head 12 and limited by a pump chamber cover which has flow-through openings 49 to the annular part 51, and an outside diameter of the annular part 51 exceeds the inside diameter of the cylindrical section 43.

(82) A dispenser, which is characterized in that an inner cylindrical section 27, 46 forming the annular space 28, 47 has catch bead formations 50 on the inside of both holder parts 22, 41.

(83) A dispenser, which is characterized in that an outer cylindrical section 24, 43 forming the outside wall of the annular space 28, 47 has a horizontally protruding peripheral edge 26, 45 on the lower side of both holder parts 22, 41.

(84) A dispenser, which is characterized in that the two holder parts 22, 41 are designed to be identical in shape.

(85) A dispenser, which is characterized in that the dispenser head wall 57 of the two dispenser heads is movable and is guided on a portion of its circumference relative to the dispenser head wall 57 of the other dispenser head 12, and the dispenser head wall 57 has a straight wall section 58 in a direction perpendicular to the direction of actuation of the dispenser head 12 in the area where it is movable relative to the fixed part 55 of the dispenser 1.

(86) A dispenser, which is characterized in that a dispenser head 12 has a dispensing opening 38 out of which the composition M can be dispensed with a dispensing direction essentially at a right angle to the direction of actuation of the dispenser head 12.

(87) A dispenser, which is characterized in that a pump chamber has a central axis x running in the direction of actuation r of the dispenser head 12, and in a cross section in which the two central axes x of the pump chambers 8 are at the greatest distance from one another, the dispensing openings 38 projected into this cross section are arranged with an offset relative to the two central axes x and to one another.

(88) A dispenser, which is characterized in that the offset is in relation to the straight wall section 58 of the dispenser head wall 57.

(89) A dispenser, which is characterized in that two storage spaces 4 and two pump chambers 8 and two dispenser heads 12, which can be actuated independently of one another to dispense the composition M, are provided, such that a follower piston 6, which has a shape 52 facing the pump chamber 8 is arranged in each storage space 4 for insertion into a connecting opening of the pump chamber 8 on the storage space end, wherein a pump chamber 8 has a central axis x running in the direction of actuation r of the dispenser head 12 and in a cross section in which the two central axes x of the pump chambers 8 are at the greatest distance from one another, the shapes 52 are designed to be eccentric with respect to each follower piston 6.

(90) A dispenser, which is characterized in that a follower piston 6 has an outline with a partially straight boundary edge and a partially curved boundary edge.

(91) TABLE-US-00001 List of Reference Numerals 1 dispenser 2 storage container 3 dispensing head 4 storage space 5 container bottom 6 follower piston 7 lower part 8 pump chamber 9 inlet valve 10 outlet valve 11 restoring spring 12 dispenser head 13 outside wall 14 lower part bottom 15 pot section 16 pot cover 17 pot wall 18 pump chamber wall 19 mandrel 20 flow-through opening 21 locking receptacle section 22 holder part 23 holder part cover 24 cylindrical section 25 locking formation 26 edge 27 cylindrical section 28 annular space 29 flow-through opening 30 annular part 31 journal 32 pump piston 33 piston neck 34 impact surface 35 head cover 36 receptacle cylinder 37 dispensing channel 38 dispensing opening 39 space 40 shape 41 holder part 42 holder part cover 43 cylindrical section 44 locking shape 45 edge 46 cylindrical section 47 annular space 48 journal 49 flow-through opening 50 locking bead formation 51 annular part 52 shape 53 cylindrical section 54 pot 55 fixed part 56 partition 57 dispenser head wall 58 wall section 59 guide block r actuating direction x axis y dispenser axis M composition