Dispenser

Abstract

The invention relates to a method for producing dispensers for outputting a fluid (F), a first and a second dispenser (1), wherein: the second dispenser can discharge a different, for example larger, output quantity than the first dispenser; both dispensers (1) comprise a pump piston (2) and a pump chamber component (3) formed as a rigid body; an inlet opening (10), which can be closed by an inlet valve (9), is formed in the pump chamber component (3), and, associated with the pump piston (2), an outlet opening, which can be closed by an outlet valve, of the pump chamber (7) is formed in the dispenser (1); in addition, a first cylindrical wall portion (4) of the pump chamber component (3), which wall portion interacts with the sealing lip (8) of the pump piston (2), transitions into a second wall portion (5) which has a larger diameter. In order to advantageously modify a discharge volume, the invention proposes that, in a first step, the first wall portion (4) of the second dispenser (1) has a second diameter, while maintaining the diameter of the second wall portion (5), in a further step, a radial extension, which has been modified in an adapted manner, of the transition wall (6) of the second dispenser (1) is formed, and, in addition, in a further step, the second diameter of the sealing lip (8) of the pump piston (2) of the second dispenser (1) is modified, for example increased, in an adapted manner.

Description

Description Spray pump with cap field of technology

[0001] The invention relates to a dispenser designed as a spray pump with an outlet opening.

[0002] In particular, it may be a donor with one or more of the characteristics described in detail below. State of the art

[0003] For such a donor, reference should first be made to the unpublished application PCT / EP2024 / 071969. Furthermore, reference should also be made generally to CN 107264970 A, WO 2008 / 003076 A2, EP 1477234 A2 and US 3877616 A. Summary of the invention

[0004] With a view to an advantageous design of the dispenser, it is proposed that the dispensing opening be covered by a cap.

[0005] The cap can have a steep closure that interacts with the outlet opening. The closure element can be formed as a single piece with the cap. However, it can also be a separate closure element housed within the cap.

[0006] It is also preferred that the cap is attached to the dispenser in a way that ensures its tamper-evident seal as it was delivered. Alternatively or 31387N2PCT mue / g 28. anuar 2026 Additionally, it is also preferred that the closure cap has a child safety lock. Brief description of the drawings

[0007] The invention is further explained below with reference to the accompanying drawing, which, however, only represents examples of embodiments. Here, the following is shown: Fig. 1 shows a dispenser with a first dispensing volume in a longitudinal cross-section, in the unactuated position; Fig. aa shows a detailed representation of the possible interaction of the restoring device with a support part; Fig. 2 shows the dispenser according to Figure 1 in the activated position; Fig. 3 shows a cross-section through the dispenser according to Figure 1 along the line III-III in Figure 1; Fig. 4 shows a cross-section through the dispenser according to Figure 1 along line IV-IV in Figure 1; Fig. 5 shows a cross-section through the dispenser according to Figure 1 along line VV in Figure 1; Fig. 6 shows a cross-section through the dispenser according to Figure 1 along line VI-VI in Figure 1; 31387N2PCT mue / g 28 January 2026 Fig. 7 the dispenser according to Figure 1 in perspective, partially broken view; Fig. 8 shows the dispenser according to Figure 1 in a representation according to Figure 7 with a second dispensing volume; Fig- 9, Fig. 9a, Fig. 9b shows a simplified representation of an injection mold with interchangeable mold parts for the production of the pump chamber component for the first and second dispensers; Fig. 10, Fig. 10a, Fig. 10b shows a simplified representation of an injection mold for manufacturing the pump piston with different mold parts for manufacturing the first and second dispensers; Fig. 11 shows the pump piston in a perspective view from an oblique angle below, in an exploded view with the valve body and the pump chamber component; Fig. 12 shows the components according to Figure 11 in a perspective view from an oblique angle above; Fig. 13 shows an attachment part of the dispenser in a partially cutaway, perspective view from an oblique angle above; 31387N2PCT mue / g 28 January 2026 Fig. 14 the part according to figure 13 in perspective view from obliquely below; Fig. 15 the actuating part with a first closure cap; Fig. 16 is a representation according to Figure 15, cut along line XVI-XVI; Fig. 17 shows the actuating part with a second cap; Fig. 18 is a representation according to Figure 17, cut along line XVIII-XVIII; Fig. 19 shows the actuating part with a third cap; Fig. 20 is a representation according to Figure 19, cut along line XX-XX; Fig. 21 shows the actuating part with a fourth cap; Fig. 22 shows an exploded view, partially cut away, of the actuating part with the closure cap according to Figure 21; Fig. 23 shows a cross-sectional view through the cap alone; Fig. 24 shows a sectional view along line XIV-XIV in Figure 21 in the unactuated state; Fig. 25 shows a representation according to Figure 24 in the actuated state; 31387N2PCT mue / g 28. anuar 2026Fig. 26 a representation of another closure cap, consisting of a cap closure part and a locking part, in a first side view; Fig. 27 shows the object according to Figure 26, in a second side view; Fig. 28 shows the object according to Figure 26 or Figure 27 in a top view; Fig. 29 shows the object according to Figure 26 or Figure 27 in a sectional view relative to the view according to Figure 27, cut along line XXIX-XXIX; Fig. 30 shows a section through the object according to Figure 26, cut along the line XXX-XXX; Fig. 31 shows a section through the object in the view according to Figure 27, cut along line XXXI-XXXI; Fig. 32 is a perspective view of the object according to Figure 26 or Figure 27; and Fig. 33 is an exploded view of the object according to Figures 26 to 31. Description of the embodiments

[0008] A dispenser 1 is shown and described, which is designed to dispense a first dispensing volume of a fluid F, which is contained in a storage vessel 27. 31387N2PCT mue / g January 28, 2026

[0009] The dispenser 1 can have a pump piston 2 and / or a pump chamber component 3.

[0010] The pump chamber component 3 can further comprise a first cylindrical wall section 4 and a second wall section 5. The second wall section 5 is also preferably cylindrical. The first wall section 4 and the second wall section 5 are preferably arranged one after the other in the discharge direction of the fluid F.

[0011] The first cylindrical wall section 4 can transition into the second wall section 5 by means of a transition wall 6.

[0012] The pump chamber component 3 is preferably a single-piece injection-molded plastic part comprising the first and second wall sections 4, 5 and the transition wall 6. The pump piston 2, together with the pump chamber component 3 and a valve part 11 (described in more detail below), can define a pump chamber 7. The pump piston 2 itself can be formed with a continuous internal cavity 70, as shown, for example, in Figure 2 (Eupendar position).

[0013] The first cylindrical wall section 4 preferably has a smaller inner diameter with respect to a central longitudinal axis A of the pump chamber 7, which preferably also coincides with a central longitudinal axis A of the pump piston 2, than corresponds to a corresponding inner dimension of the second, preferably cylindrical, wall section 5. If the inner dimensions of the wall section 5 differ in the direction of the longitudinal axis A, the smallest inner dimension is used. 31387N2PCT mue / g January 28, 2026

[0014] The transition wall 6 can, as shown in the exemplary embodiment, run approximately perpendicular to the longitudinal axis A. However, it can also be formed at an acute or obtuse angle to the longitudinal axis A.

[0015] Furthermore, the pump piston 2 preferably has a sealing lip 8 that interacts with an inner surface of the first cylindrical wall section 4. In this case, the sealing lip 8 can be completely closed and preferably, as in the exemplary embodiment, be arrow-shaped downwards, corresponding to an inlet valve 9 of the pump chamber 7. As also shown, it can be a double sealing lip 8.

[0016] An inlet opening 10 of the pump chamber component 3 can be closed by an optional inlet valve 9. The closure of the inlet opening 10 by the inlet valve 9 can be achieved by a further valve part 11. In the exemplary embodiment, and preferably, the optional valve part 11 is movably arranged in the cavity 70 of the pump piston 2.

[0017] The inlet valve is preferably designed as part of the one-piece valve part 11, as in the exemplary embodiment. The valve part 11 is preferably rod-shaped overall, and more preferably of a fixed length. The valve part 11 further preferably has an outlet valve 44 at one end opposite the inlet valve 9, which is described in more detail below. During pressure build-up for spraying the fluid F, the pump chamber 7 can be limited on one side by the inlet valve 9 and on the other side by the outlet valve 44. An annular volume between the valve part 11 and the cavity 70 31387N2PCT mue / g 28 January 2026 limiting inner surface of the pump piston 2 can be part of the pump chamber 7 and accordingly be included in the pump chamber volume.

[0018] The first cylindrical wall section 4 can transition seamlessly into the second, optionally cylindrical, wall section 5 of the pump chamber component 3 via the transition wall 6. The transition wall 6 can be formed with a radial outward projection with respect to the longitudinal axis A, in order to connect the second wall section 5, which has a larger diameter, with the first cylindrical wall section 4.

[0019] The dispenser 1 can further include a return element 12. In the exemplary embodiment, and preferably, the return element 12 is formed as a pump bellows 26. By means of the return element 12, the spray pump can be returned from an end position according to Figure 2 to the initial position according to Figure 1.

[0020] With reference to Figures 9, 9a, 9b, a possible injection mold 13 for a pump chamber component is shown, comprising a pump chamber outer part 14 and a pump chamber mold core 15. The pump chamber outer part 14 is shown here as two parts. In principle, it can also be formed in one piece or consisting of more than two parts.

[0021] In the pump chamber outer mold part 14, an interchangeable part can be arranged as an outer mold part 16. As can be seen from a comparison of Figures 9 and 9b, if the outer mold part 16 is omitted, the first cylindrical wall section 4 of the pump chamber component 3 to be manufactured can be formed with a larger radius, and correspondingly the transition wall 6 with a smaller extent. The interchangeable part is preferably formed here as a cylindrical sleeve. 31387N2PCT mue / g January 28, 2026

[0022] The pump chamber mold core 15 comprises a pump chamber mold core part 17, which is preferably replaceable. The pump chamber mold core part 17 can essentially also be formed as a cylindrical sleeve part. In the exemplary embodiment, and preferably, however, it also has a radial enlargement at its upper end in order to facilitate the transition to the modified transition wall 6.

[0023] When the parts are combined according to Figure 9b, the pump chamber mold core part 17 is visibly attached to the pump chamber mold core 15, so that the first cylindrical wall section 4 with the aforementioned, here by way of example larger, diameter can be formed.

[0024] In contrast, in the design according to Figure 9a, the pump chamber mold core part 17 is not attached to the pump chamber mold core 15, whereas the outer mold part 16 is attached to the pump chamber outer mold part 14, so that the first cylindrical wall section 4 can be injection molded with a reduced diameter and, accordingly, the transition wall 6 with a larger radial extent.

[0025] Due to different wall thicknesses of the outer mold part 16 and the pump chamber mold core part 17, a large number of intermediate sizes of the pump chamber component 3 can also be produced rationally in this area.

[0026] More generally, it is possible that, for the production of the second dispenser 1, the pump chamber mold core part 17 and / or the outer mold part 16 for shaping the pump chamber 7 of the first dispenser 1 are removed, or that the pump chamber mold part 17 and / or the outer mold part 16 are replaced with a pump chamber mold part 17. 31387N2PCT mue / g 28 January 2026 core part 17 and a pump chamber outer mold part for the design of the pump chamber 7 of the second dispenser 1 will be replaced.

[0027] Furthermore, the piston injection mold 18 preferably has a piston injection mold core 21, which further preferably has an interchangeable piston mold core part 22.

[0028] As can be seen from Figures 10a and 10b, the pump piston 2 can thus be manufactured with a sealing lip 8 of smaller diameter, Figure 10a, and with a larger diameter, Figure 10b.

[0029] For the production of the pump piston 2 with the sealing lip of smaller diameter, the piston outer mold part 20 is preferably inserted in the piston injection mold 18, here the piston injection mold outer mold 19, in the area of ​​the sealing lip. The piston mold core part 22 is preferably not inserted in the piston injection core 21.

[0030] To manufacture the pump piston 2 with a larger sealing lip according to Figure 10b, the piston outer mold part 20 is not used in the piston injection mold 18, but the piston mold core part 22 is used in the piston injection core 21.

[0031] In Figures 10, 10a, and 10b, the piston injection mold 18 is also shown as a two-part structure. In principle, it can also be formed as a single piece (with respect to the outer mold part) or as more than two parts. Furthermore, with respect to the piston injection mold 18, wall thicknesses of the piston outer mold part 20 and the piston core part 22 can be provided to create a multitude of different volumes with different thicknesses, each as a separate, interchangeable part. 31387N2PCT mue / g January 28, 2026

[0032] By preferably modifying practically only the pump chamber component 3 in the area of ​​the first wall section and the transition wall, and / or the pump piston 2 only with respect to the sealing lip, the rod-like valve part 11 can be used unchanged, regardless of the actual spray volume achieved with a specific dispenser, specifically a spray pump. The necessary design for the movement of the valve part 11 over a limited distance in the axial direction, as explained in more detail below, can also be independent of the actual spray volume achieved. The mounting feature for this on the pump chamber component 3 is located upstream of the optionally modifiable first wall section 4 with respect to the flow direction of the fluid F. If necessary, only a part of the pump chamber 7 needs to be modified, namely insofar as the pump piston 2 interacts with the first cylindrical wall section 4 via the first sealing lip 8.Any additional part of the pump chamber 7, essentially defined by the annular space between the valve part 11 and an inner surface of the pump piston 2, which preferably extends substantially in a flow direction of the fluid F beyond the sealing lip 8, does not need to be changed.

[0033] The modified parts of a corresponding spray pump with respect to different volumes are particularly evident in Figures 7 and 8. Figure 7 shows a spray pump, focusing on the parts of interest here, with a small spray volume, and Figure 8 shows one with a larger spray volume.

[0034] Referring further to Figures 1 to 8, the dispenser 1 preferably further comprises an actuating part 23, more preferably the valve part 11, and furthermore preferably a mounting part 25. A restoring element can be provided between the actuating part 23 and the mounting part 25. 31387N2PCT mue / g January 28, 2026 Exemplary embodiment and preferably a bellows part 26. The mounting part 25 can hold the dispenser 1 or the spray pump 1 on the reservoir 27.

[0035] The actuating element 23 can have a nozzle section 54, which is preferably elongated and preferably has the outlet opening 37 at its upper end. The nozzle section is preferably tubular, but, particularly in its outer contour, preferably tapered upwards. Furthermore, the actuating element 23 preferably has actuating extensions 78. These can project radially outwards with respect to the axis A, preferably extending substantially perpendicular to the axis A. They are preferably integrally formed at a lower end of the nozzle section 54. The actuating extensions 78 form actuating surfaces 53 on their upper sides. A user can thereby depress the actuating element 23 to spray liquid from the reservoir 27. Alternatively, only one circumferential actuating extension 78 may be provided.

[0036] A connecting collar 79 is formed on the underside of the actuating extensions 78, but preferably associated with a radially outer edge of an annular plate section 74 (see also Figures 24 and 25), into which the nozzle section 54 transitions on the underside and on which the actuating extensions 78 are preferably formed with radial projections. The connecting collar 79 extends from the plate section 74 in the opposite direction to the nozzle section 54. The connecting collar 79 serves for an axially movable, yet secured connection with the mounting part 25. For this purpose, the connecting collar 79 may have an inwardly projecting retaining bead 80 at its lower end. 31387N2PCT mue / g January 28, 2026

[0037] The return element, here in the form of the pump bellows 26, can be arranged in the space thus created between the mounting part 25 and the actuating part 23. For inward centering, at least on the upper side with respect to the return element, a centering wall 81 extending radially inward and in the same direction as the connecting collar 79 can be formed on the actuating part 23, preferably on the annular circumferential area, the plate part 74.

[0038] The pump chamber component 3 can hold a suction pipe 28 at its end, inside the reservoir 27. It can also have a plate-shaped extension 94 at its end, as shown. This can, for example, provide a certain degree of stability to the pre-assembled unit, which is not yet placed on the reservoir 27 and in which the suction pipe 28 may not yet be inserted.

[0039] A sealing ring 30 can be arranged between an upper mouth rim 29 of the storage vessel 27 and the mounting part 25. The sealing ring 30 can also abut radially on the inside or on the outside of the second wall section 5 to provide a seal.

[0040] The pump chamber component 3 can further extend upwards, adjoining the second cylindrical wall section 5 at the outlet, a locking collar 31 which can be received, preferably by snapping, in a locking recess 32 of the mounting part 25. The locking collar 31 is preferably, as in the exemplary embodiment, slightly extended radially outwards, preferably less than the wall thickness of the pump chamber component 4. The locking recess is adapted accordingly in this case. 31387N2PCT mue / g January 28, 2026

[0041] The valve part 11 is preferably mounted in the pump chamber component 3 with axially limited movement. For this purpose, locking elements 33 formed on the pump chamber component 3 can serve, which can interact with counter-locking elements 34 on the valve part 11. The locking elements 33 can be cams distributed around the circumference. The locking elements 33 can thus ensure flow. The counter-locking elements 34 can be part of a circumferential shoulder on the valve part 11. The counter-locking elements 34 can also be designed alternatively or additionally to ensure flow. For this purpose, passage grooves 71 are preferably formed in the valve part 11, extending through the shoulder (see also Figures 7 and 8).The valve part 11 can be moved between the open position shown in Figure 1 and the closed position shown in Figure 2 (where the inlet opening 10 is closed) by means of the locking means 33 and the counter-locking means 34. In the closed position of the inlet opening 10, a conical surface 36 of the valve part 11 interacts with a counter-conical surface 35 of the pump chamber component 3. The working stroke of the valve part 11 can be, for example, 0.4 to 1 mm, more preferably about 0.6 mm.

[0042] The valve part 11 preferably further comprises an extension section 24. The extension section 24 projects centrally and guidingly into the inlet opening 10, which is thus tubular in design. The extension section 24 is comparatively long. It preferably has a length that corresponds to a multiple of the inner diameter of the inlet opening 10, preferably two or more times up to five or ten times.

[0043] The continuation section 24 widens in a funnel shape outside the inlet opening 10 and transitions into a stem section of the valve part 11. The valve part 11 is otherwise surrounded in this area by the 31387N2PCT mue / g January 28, 2026 upper area of ​​the continuation section 24, bell-shaped. On the outer wall of the bell shape, the counter-conical surface 36 is formed for interaction with the conical surface 35 of the pump chamber component 3, thereby achieving the valve-like closure. This results in the valve-like closure over a comparatively large diameter. Favorable force adjustment is possible.

[0044] Preferably, and preferably also achieved by the bell-shaped design, the inlet valve 9 has a larger contact area, as seen from the pump chamber 7, than the outlet valve 44. This further ensures that the inlet valve 9 remains closed during the discharge of liquid.

[0045] Because a filling wall 82 also projects into the bell area from the pump chamber component 3, a small residual volume can advantageously be achieved in this area when the valve is closed.

[0046] Furthermore, the continuation section 24 can lie with play in the entry opening 10, so that it can be bypassed.

[0047] The outlet valve 44 is preferably designed as a lip valve. In a longitudinal cross-section, as shown in the enlarged view in Figure 1, a V-shaped design can be provided.

[0048] The outlet valve 44 is preferably uniform in shape around its circumference. With respect to axis A, it is preferably axially symmetrical or point-symmetrical along the length of axis A. It is also formed as a single, integral part throughout the lip area. The V-shaped design is hinge-free. It opens only by 31387N2PCT mue / g January 28, 2026 Elastic deflection. This can also occur at any circumferential section of the lip area. Preferably, no preferred circumferential section is formed at which fluid F preferably flows when the outlet valve opens.

[0049] As shown in the magnified view of Figure 12, the funnel-shaped lip 75, viewed in the axial direction A and in the direction of fluid flow F, can first have a conically widening outward section 76 and subsequently a conically tapering inward section 77. The magnified view refers to a relaxed state of the outlet valve 44, not inserted in the pump piston 2. Furthermore, an end face 72 is preferably formed, which preferably has a comparatively small width. In the depicted unloaded state, a maximum diameter D of the outlet valve 44 is preferably larger than an inner diameter d (compare Figure 1) of the pump piston 2. Thus, the outlet valve 44, if applicable, always rests under preload against an inner surface of the pump piston 2 in the assembled state according to Figure 1.The transition between the first section 76 and the second section 77 can provide a relatively small area of ​​maximum contact force in the direction of axis A due to the preload on the inner surface. Furthermore, a transition between the first section 76 and the second section 77 is preferably formed with a distance of 2 to 3 mm to the end face 72.

[0050] The V-shape of the exhaust valve 44 in cross-section allows the preload to be achieved favorably in the valve part 11, which is preferably manufactured in one piece and from the same plastic material. 31387N2PCT mue / g January 28, 2026

[0051] The cone angle, with respect to a perpendicular to the axis A, with respect to which an outer wall of the first cone section 76 preferably extends outwards, is preferably selected to be between 75 and 85 degrees, and more preferably approximately 80 degrees. With respect to an inner wall, the angle can be selected to be between 65 and 80 degrees, more preferably between 70 and 75 degrees, and again more preferably approximately 73 degrees. The cone angle of the first section 76 is preferably between 7 and 10 degrees.

[0052] The valve part 11 and preferably other, substantially or completely, parts of the dispenser 1 preferably consist of the same or at least similar plastic, in particular polyethylene (PE) or polypropylene (PP). These parts are in particular the pump chamber component 3 and / or the pump piston 2 and / or the return element 12 and / or the actuating part 23, optionally also the sealing ring and the support element 42.

[0053] The preload makes it possible to achieve the spraying effect that is particularly characteristic of this spray pump. When the actuating element 23 is depressed, fluid will not immediately flow, but only when a specific, critical pressure is reached, causing the lip valve of the outlet valve 44 to lift off an inner surface of the pump piston 2. Due to the circumferentially uniform design of the lip valve, lifting can occur in any area of ​​its circumference. Complete circumferential lifting is also possible, although in practice it is likely that only a selected area of ​​the circumference will lift off at any given time, allowing fluid to flow through while the other areas remain in contact.

[0054] This preloaded contact in the pump piston 2 is also advantageous with regard to the dragging of the valve part 24 from an actuated 31387N2PCT mue / g January 28, 2026 Position according to Figure 2 to the unactuated position according to Figure 1. At least as far as the otherwise described limited mobility of the valve part 24 allows. Since the inlet valve is in the open position in the unactuated state, this also achieves the desired seal with respect to the pump chamber.

[0055] In practice, an excess achieved by the diameter D is preferably 1 / 10 to 3 / 10 mm.

[0056] The sectional view in Figure 3 shows that the pump piston 2, in the section just before an outlet opening 37, and preferably also over a larger section of its inner free space, is designed with a star-shaped cross-section. The points of the star can each extend into an opening 43 of the pump piston 2 (see also Figures 10a, 10b, 11, and 12), which forms a supply line to the outlet opening 37 between the pump piston 2 and an inner surface of the actuating part 23. This outlet opening 37 can be formed in the actuating part 23. In the exemplary embodiment, there are three points of the star, which can correspondingly form three supply lines to the outlet opening. In the injection mold (see Figures 10a and 10b), good centering of the piston injection mold core 21 can be achieved by forming correspondingly projecting mold sections around the openings 43.

[0057] On the front side, facing the outlet opening 37, one or more spacer webs are preferably formed at the corresponding end of the pump piston 2, which ensure the required distance so that the fluid F can exit through the outlet opening 37 during a spraying process while flowing around the front side of the pump piston 2. 31387N2PCT mue / g January 28, 2026

[0058] The mounting part 25 preferably has a retaining feature 38 in a lower circumferential region for mounting on a neck region of the reservoir 27. Furthermore, in a preferably one-piece design, the mounting part 25 also preferably has a guide section 39 for guiding the pump piston 2 in a central region. Below the guide section 39, the mounting part 25 preferably has a larger inner diameter and can thus preferably form, in a region 40, separately by the second sealing lip 41, part of an air chamber 48 between the mounting part 25, the pump piston 2, and the pump chamber component 3.

[0059] The pump piston 2 can have a second sealing lip 41, see also Figures 11, 12, with which it can seal against an inner surface of the area 40 of the mounting part 25. Alternatively or additionally, a second or further sealing lip 41a, compare Figure 2, can also be formed on an associated inner surface of the mounting part 25.

[0060] Furthermore, the pump piston 2 has the sealing lip 8 – the first one in the exemplary embodiment – ​​with which it seals against an inner surface of the first cylindrical wall section 4 of the pump chamber component 3 to form a pump chamber. As also shown in the exemplary embodiment, this sealing lip 8 can also be formed in two parts directly one after the other.

[0061] The pump piston 2 is preferably detented in the actuating part 23. The detent is further preferably designed such that the pump piston 2 is detented upwards, towards the outlet opening 37, with a preload. 31387N2PCT mue / g January 28, 2026

[0062] The return element, here the bellows part 26, can be supported on the inside of the actuating part 23 by a support element 42. The support element 42 can initially provide a support area, which may optionally be formed directly on the actuating part 23. The support area can be formed by one or more spacer webs. In the exemplary embodiment, the support element 42 is located on the upper side. However, it can also be provided on the underside of the return element, either alternatively or additionally.

[0063] The support area can also be formed by a support element 84, shown here only as an indication, arranged between the return element and the actuating element 23 or the mounting element 25. The support element can be disc-shaped. In this case, the end of the return element rests against the support element 84; it preferably does not penetrate it (see also Figure 1a).

[0064] It is particularly preferred that such a support element 84 is porous to allow air to flow through it. For this purpose, micro-openings with a free diameter of 2 g / m or less, particularly down to 0.5 µm, can be formed in the support element 84, which preferably consists of a plastic material. Preferably, the micro-openings have a diameter of approximately 1 µm. The plastic material can be a sintered plastic material. It can be produced from one or more thermoplastic polymers by heat and pressure. This allows for a controlled pore size and a controlled pore volume. Suitable materials include polyethylene, polypropylene, polytetrafluoroethylene, and polyvinylidene fluoride (PVDF), which can be used individually or in combination.

[0065] With reference to Figures 13 and 14, the attachment part 25 is shown in further detail. 31387N2PCT mue / g January 28, 2026

[0066] In particular, it can be seen that the locking collar 31 can have individual locking tongues 45 which can engage springily in the locking recess 32 during assembly.

[0067] The guide section 39 can be provided with support features 46 on its underside. In a specific design of the return element, a lower portion of the return element can be supported by these features. These support features can be individual or a circumferential shoulder. The guide section 39 can also have one or more longitudinal grooves 83. When the spray pump is actuated, these grooves can be passed over by the second sealing lips 41, thus allowing air to flow into the air chamber 48 and ultimately into the reservoir in the storage vessel.

[0068] On the underside, as can be seen particularly in Figure 14, radial projections 47 can be provided which extend into the air chamber 48. They can define the boundaries of the air chamber 48 or serve to adjust the volume of this air chamber 48.

[0069] They are formed below a transverse wall 49 of the mounting attachment 38. The transverse wall 49 forms a boundary on its upper side of the space in which the restoring means 12 is arranged and preferably also forms the locking recess 32 on its lower side.

[0070] A wall area 85 can adjoin the transverse wall 49 below, which preferably forms the mounting shape 38 for attachment to the storage vessel 17. 31387N2PCT mue / g January 28, 2026

[0071] With reference to Figures 15 and 16, a first embodiment of a closure cap 50 is shown. The closure cap 50 is shown to be held, preferably in a lower region, by one or more detent features 51 on the actuating part 23 and one or more corresponding detent recesses 52 on the closure cap 50. This is preferably done in the nozzle section 54 of the actuating part 23, which projects upwards beyond the actuating surfaces 53 of the actuating part 23. The detent feature and the detent recess can also be provided on the other part.

[0072] With reference to Figures 17 and 18, a further embodiment of the closure cap 50 is shown. This is particularly advantageous with regard to child safety. Pressure is first applied to an outer wall area 55, preferably simultaneously at several points, and more preferably opposite each other, preferably inwards, towards the longitudinal center axis A. Only after this pressure has been applied and maintained is the closure cap 50 released from the latching position and can be removed in a different direction, here and preferably in the direction of the longitudinal center axis and upwards, away from the dispenser.

[0073] In this embodiment, the closure cap 50 has locking lugs 56 on flexible wall areas 55, which are formed with respect to a radially inner area of ​​the actuating surfaces 53 for gripping the actuating part 23. To remove this closure cap 50, the wall areas 55 must first both be pressed inwards together, after which it can be pulled upwards.

[0074] Furthermore, this closure cap 50, like the closure cap according to Figures 15 and 16 and the other closure caps described here, also has a preferably central feature in the upper area. 31387N2PCT mue / g 28 January 2026 Sealing form 57, with which the outlet opening 37 is sealed when the closure cap is in place.

[0075] The sealing element is formed inside the closure cap 50. Starting from a surrounding, approximately flat area, it projects inwards in the direction in which the closure cap 50 is fitted. In the embodiment shown in Figures 21 to 25, the sealing element 57 is formed on the inner locking part 63, which is also described therein. This is preferably formed integrally with the spring section 66.

[0076] With reference to figures 19 and 20, a further closure cap 50 is shown.

[0077] This closure cap 50 is also particularly advantageous with regard to child safety and is preferably designed in the same way as the closure cap of Figures 17 and 18.

[0078] In preferably all embodiments described here, it can also be provided that the actuating part 23 has support ribs 58 on the inside of the nozzle section 54, which, in the assembled state, provide support and centering for the pump piston 2. The support ribs 58 preferably extend longitudinally, i.e., along axis A. This also counteracts tilting of the pump piston 2.

[0079] As already mentioned, the pump piston 2 is preferably detented in the actuating part 23, so that it moves with the actuating part 23, but preferably not relative to the actuating part 23, during actuation. This detent is further preferably such that the pump piston is constantly in contact with an associated end face of the actuating part (inside). 31387N2PCT mue / g 28 January 2026 is pre-tensioned. The actuating element 23 is preferably designed with two sections of different diameters in the discharge direction of the fluid F. In the flow direction of the fluid F, a section of larger diameter is initially formed; the support ribs 55 are preferably formed in this section, followed by the section of smaller diameter. The detent retainer of the pump piston is preferably located in the section of smaller diameter. For this purpose, a detent recess on the actuating element 23 can interact with an associated inner surface of the actuating element 23 with a detent projection of the pump piston 2, or vice versa.

[0080] Furthermore, it is preferably implemented in all the closure caps 50 described here that, at least with respect to an inner wall 59, which may also be the only wall in this area, an air passage 60 remains, providing a continuous air space up to the sealing element 57 in order to allow any residual liquid to dry out after use. A connection to the outside may be provided, for example, via openings 61 and / or in the area of ​​the locking elements with respect to the locking lug 56. This also applies in the area of ​​the locking elements 62, with which the actuating part 23 is preferably axially movable but snap-fitted to the mounting attachment 38. The sealing element 57 itself is preferably not ventilated; the sealing effect is ensured when the closure cap is in place, regardless of the air space.

[0081] With reference to Figures 21 to 25, a further embodiment of the closure cap 50 is shown. Due to the need for multiple impacts in different directions to remove the closure cap 50 from the dispenser, this closure cap 50 can also be considered child-resistant. 31387N2PCT mue / g January 28, 2026

[0082] In contrast to the embodiments of closure caps 50 described below, the closure cap or a part belonging to the closure cap 50 (initially, before the closure cap is first removed) does not penetrate an actuating surface 53 of the actuating part 23 and / or does not engage with the actuating part 23. However, as shown, it may optionally rest on the underside of the actuating surface 53.

[0083] This closure cap 50 has an internal locking element 63. The internal locking element 63 is preferably formed separately from a cap part 64. The internal locking element 63 can have an actuating projection 65, preferably projecting centrally from the upper side of the cap part 64. The locking mechanism can be realized with respect to a through-opening 87 by means of the actuating projection 65, for which a locking bead 86 can be formed. For assembly, the locking element is then pressed through from inside the cap so that, in the assembled state, the locking bead 86 is on the outside. The sealing element 57 is also preferably connected to the internal locking element 63 via a spring section 66. The locking bead can prevent the internal locking element 63 from falling out when the closure cap is removed. The spring section 66 is preferably elastically deformed in the illustrated closed state.This can create a preload by means of which, in this embodiment, the sealing element 57 rests on the outlet opening 37.

[0084] As can be seen from a comparison of Figures 24 and 25, by applying downward pressure to the actuating projection 65, the spring arms 67, which are pre-tensioned radially inwards and have the engagement sections 68, can be moved radially outwards, thus releasing the detent connection to the actuating part 23. At the same time, this initially increases the pressure of the sealing element 57 on the outlet opening. 31387N2PCT mue / g January 28, 2026

[0085] Preferably by means of suitable guide sections 69 on the actuating part 23, it is ensured that the spring arms 67 move outwards.

[0086] The cap section 64 may have one or more through-openings 95. A through-opening 95 is preferably formed at the same height as an engagement section 68. This allows, for example, verification of proper locking.

[0087] In the pump chamber component 3, preferably the transition wall 6, one or more air openings 73 (see, for example, Figure 7), which are not shown in detail, are preferably provided, distributed around the circumference, to ensure air equalization with the liquid inside the container. Through the second sealing lips 41, a pneumatic force can simultaneously be exerted on the liquid during dispensing via the air openings 73, and / or an inflow of air into the storage vessel can be ensured.

[0088] The end caps described here are also each locked to the actuating part in such a way that the sealing element 57 sits on the opening with preload when the end cap is attached.

[0089] The sealing ring 30, see Figures 2 and 3, preferably has a non-circular opening. This proves particularly advantageous with regard to assembly, for example, if the upper assembly is first mounted without the container and only later attached to a container. The sealing ring 30 can then bear against the pump chamber component 4 (outside) with varying degrees of preload around its circumference. 31387N2PCT mue / g January 28, 2026

[0090] Another possible embodiment of a closure cap is shown in Figures 26 to 33.

[0091] This closure cap has a cap closure part 88 and a locking part 89, see in particular Figure 33.

[0092] Preferably, the cap closure part 88 and the locking part 89 are initially injection-molded as a single piece. The connection between the parts can be provided, in particular, by means of tear-off tabs 90.

[0093] This ultimately ensures authenticity. Preferably, for use with the dispenser, the cap closure part 88 is separated from the locking part 89 by tearing off the tear-off tabs 90.

[0094] The closure cap 50, preferably consisting of the cap closure part 88 and the locking part 89, is further preferably held in the actuating part 23 by means of the locking part 89.

[0095] The cap closure part 88 itself is also preferably, and preferably in accordance with the previously described closure caps 50, snap-fitted to a section of the actuating part 23, here preferably the nozzle section 54. This is further preferably achieved by means of the snap-fit ​​design 51 and a snap-fit ​​recess 52, which can each alternatively be formed on the closure cap 50 or on the part of the actuating part.

[0096] In this design of the closure cap, similar to the embodiment according to approximately Figure 20, an opening comparable to the opening 61 is used for locking, here for locking the locking part 89. 31387N2PCT mue / g January 28, 2026

[0097] The locking element 89 has, as shown in Figure 31, corresponding gripping lugs 91 which are elastically movable on the locking element 89. The gripping lugs 91 are formed on a web 95 exposed through an opening 92 in the locking element 89, thus enabling, for example, elastic deformation.

[0098] The locking element 89 is also preferably designed to fit into the actuation surface 53.

[0099] If necessary, the locking element 89 can also be connected to the actuating element 23 in such a way that it cannot be detached without being destroyed after initial insertion. This can be achieved, for example, by welding. Alternatively or additionally, the locking mechanism using the gripping lugs 91 can be designed to be so strong that it cannot be opened by a user, or at least only with the aid of a tool.

[0100] As already described in relation to the embodiments of the closure cap 50, it is also preferred in this embodiment that the closure cap 50, here in particular the cap closure part 88, is ventilated from the inside when in place and especially also in a state in which the tamper-evident seal is still in effect. This is achieved by providing an air passage 60; see also Figure 31. As can also be seen from the view in conjunction with Figure 30, the interaction of the locking recess and the locking form can be interrupted over a circumference. Because the cap closure part 88 preferably rests against an outer surface, here the nozzle section 54, in the upper area, but this surface is designed to be air-permeable, ventilation can occur up to the vicinity of the sealing form 57. Preferably, the contact in this upper area is provided by ribs 93. 31387N2PCT mue / g January 28, 2026

[0101] The described arrangement using the ribs 93 is preferably also given in the other embodiments of the closure cap 50 described here.

[0102] The described closure cap 50 is preferably elongated in the direction of the longitudinal central axis, regardless of the embodiments described in detail. It has a ratio of its largest diameter to its length of preferably 1.5 or more, up to and especially 2. This refers to the closure cap 50, which can be removed for use and then replaced, and not to any locking element 89 that may remain on the dispenser.

[0103] In the closure caps described here, regardless of the specific design, it is preferably achieved and realized that the sealing element 57 sits on the outlet opening 37 with a preload when the closure cap 50 is attached. This is preferably achieved by the locking mechanism of the closure cap 50, or, in the embodiment shown in Figures 26 to 33, by the attachment of the cap part 88 to the dispenser. Preferably, the locking mechanism is also designed with an inclined surface that causes the closure cap 50 to be pulled downwards in the locked position, i.e., away from the outlet opening 37 in the direction of its longitudinal center axis. This facilitates achieving the desired preload with which the sealing element 57 sits on the outlet opening 37. 31387N2PCT mue / g 28 January 2026 List of reference symbols 1 dispenser, 27 storage containers 2 pump pistons 28 suction pipe 3 Pump chamber component 29 Mouth edge 4 First cylindrical wall 30 Sealing ring cut 31 Rast collar 5 second wall section 32 locking recess 6 transition wall 33 locking device 7 Pump chamber 34 Counterlock 8 First sealing lip 35 Counter cone surface 9 Inlet valve 36 Cone surface 10 Inlet opening 37 Outlet opening 11 Valve part 38 Mounting mold 12 Restoring element 39 Guide section 13 Pump chamber component - injection area 40 mold 41 second sealing lip 14 pump chamber outer mold part 41a second sealing lip 15 pump chamber mold core 42 support means 16 Outer molded part 43 Opening 17 Pump chamber core part 44 Outlet valve 18 piston injection mold 45 locking tongue 19 Piston outer shape 46 Support shape 20 Piston outer shape part 47 Radial shape 21 Piston injection mold core 48 Air chamber 22 Piston core part 49 Cross wall 23 Actuating part 50 V Closure cap 24 Continuation section 51 Detent shape 25 Mounting part 52 Detent recess 26 Bellows part 53 Actuating surface 31387N2PCT mue / g 28 January 2026 Nozzle section 79 Connecting collar Wall area 80 Mounting bead Locking lug 81 Centering wall Sealing form 82 Filling wall Support rib 83 longitudinal groove Interior wall 84 support part Air path 85 Wall area Opening 86 Detent bead Detent form 87 Passage opening Inner detent part 88 Cap closure part 88 Cap part 89 Detent part Actuating projection 90 Tear-off bar Detent projection, spring section 91 Gripping nose Spring arm 92 Opening Engagement section 93 Rib Guide section 94 Plate-shaped enlargement Cavity 95 Web through groove Front surface Air opening A axis Plate part D diameter Lip F Fluid first cone section second cone section d diameter actuating extension 31387N2PCT mue / g January 28, 2026

Claims

32 Claims 1. Dispenser (1) for spraying a fluid, preferably with a pump piston (2) and further preferably a pump chamber component (3) optionally formed as a rigid body, wherein in the given case the pump piston (2) together with the pump chamber component (3) defines a pump chamber (7), wherein further in the given case the pump piston (2) has a sealing lip (8) and is movable along a longitudinal axis (A) of the pump chamber (7) between an initial position and an end position, wherein further, preferably in the pump chamber component (3), an inlet opening (10) closable by an inlet valve (9) and, preferably associated with the pump piston (2), an outlet opening (37) closable by an outlet valve (44), optionally of the pump chamber (7), wherein in addition, in the given case the pump chamber component (3) has a first cylindrical wall section (4) of the pump chamber component (3) accommodating the pump piston (2),in which the pump piston (2) is further movably abutted by a sealing lip (8) on an inner surface of the pump chamber component (3), wherein the wall section (4) preferably transitions in one piece into a second, larger diameter wall section (5) via a circumferential transition wall (6) extending outwards with respect to the longitudinal axis (A), which further preferably extends concentrically to the first wall section (4), wherein the dispenser (1) further preferably has a restoring means (12) for moving the pump piston (2) from the end position to the initial position, characterized in that the dispenser (1) has an outlet opening (37) designed for dispensing the fluid in the direction of the longitudinal axis and that the outlet opening (37) is covered by a closure cap (50). 31387N2PCT mue / g January 28, 202633 2. Dispenser according to claim 1, characterized in that the closure cap (50) has a sealing form (57) that interacts with the outlet opening (37).

3. Dispenser according to one of claims 1 or 2, characterized in that the closure cap (50) is snap-in mounted on the dispenser (1).

4. Dispenser according to one of claims 2 or 3, characterized in that the sealing form (57) seals the outlet opening (37) under elastic preload when the locking cap (50) is in place.

5. Dispenser according to one of claims 3 or 4, characterized in that the closure cap (50) is capable of allowing flow through it in the latched state outside the sealing form (57).

6. Dispenser according to one of the preceding claims, characterized in that the outlet opening (37) is formed at a distal end of a nozzle section (54) of the dispenser.

7. Dispenser according to claim 6, characterized in that the closure cap (50) is centered on the nozzle section (54).

8. Dispenser according to one of the preceding claims, characterized in that the closure cap (50) has a tamper-evident seal.

9. Dispenser according to claim 8, characterized in that the tamper protection is provided by tear-off tabs (90) between a cap closure part (88) and a locking part (89). 31387N2PCT mue / g January 28, 202610. Dispenser according to claim 9, characterized in that the locking part (89) remains locked in the dispenser after a break in the originality.

11. Dispenser according to one of claims 9 or 10, characterized in that the locking part (89) is locked onto the actuating part (23).

12. Dispenser according to one of claims 9 to 11, characterized in that the locking part (89) is inserted into an actuating surface (53) of the actuating part (23).

13. Dispenser according to one of the preceding claims, characterized in that the closure cap (50) on the dispenser is child-resistant.

14. Dispenser according to one of the preceding claims, characterized in that the closure cap (50) has one or more locking lugs (56) on flexible wall sections (55) which are designed for under-gripping of the actuating part (23).

15. Dispenser according to claim 14, characterized in that a detent counter-formation is formed on the actuating part (23) below an actuating surface (53).

16. Dispenser according to one of the preceding claims, characterized in that the closure cap (50) has an inner locking part (63) formed separately from the closure cap. 31387N2PCT mue / g 28 January 202617. Dispenser according to claim 16, characterized in that the inner locking part (63) has an actuating projection (65) penetrating a cap part (64) of the closure cap (50).

18. Dispenser according to one of claims 16 or 17, characterized in that the inner locking part (63) has spring arms (67).

19. Dispenser according to claim 18, characterized in that the spring arms (67) can be moved from a detent position by pressure on the actuating projection (65).

20. Dispenser according to one of claims 18 or 19, characterized in that the spring arms (67) in the closed state act with a preload towards the center inwards to maintain a detent position on a nozzle section (54) of the dispenser. 31387N2PCT mue / g 28th annuary 2026

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