Dosing device and container.

Description

1 / 26 DOSING DEVICE AND CONTAINER

[0001] The present invention relates to a dispensing device for liquid and fluid products and to a container with an integrated dispensing device.

[0002] Liquid and fluid products or substances and mixtures of substances include, in particular, liquids or mixtures of liquids of low to high viscosity, as well as viscoelastic materials. In addition to solutions, emulsions and suspensions or dispersions are also mentioned in a non-exhaustive list. The products mentioned may be, for example, liquids, gels, creams, ointments or lotions for personal hygiene and / or cleaning, medicines, technical liquids, oils and fats or similar.

[0003] For storage, transport, sale and use, liquid or fluid products are generally stored in a container or in sales or transport packaging. In this context, a large number of different types of containers and packaging have been developed in the past. Examples include bottles, cans, tubes, jars, containers and composite boxes, etc.

[0004] If more precise dosing of the liquid or fluid product is required or desired, the containers mentioned above may be fitted with a threaded pump cap with a lift pump, a pipette or other dosing device.

[0005] Bottles available on the market with dosing devices generally consist of a large number of components, which need to be assembled in a complex way and are difficult to recycle completely due to the different materials used (e.g., components made of different plastics along with components made of metal, such as springs, etc.).

[0006] Throughout the product lifecycle, this leads to high material and energy consumption, as well as high CO2 emissions.

[0007] Film pouches, also known as "pouches," are currently considered one of the most economical and environmentally friendly packaging options for liquid and fluid products. Film pouches have been around for many years, but were unpopular due to their poor handling and high susceptibility to mechanical damage.

[0008] Film bags are becoming increasingly popular, for example, as bags with a bottom that allow them to stand upright, bags with a spout, flat bags and bags with a gusset, due to the advantages described above. Petition 870250087246, dated 09 / 26 / 2025, page 11 / 54 2 / 26

[0009] Most innovative bags, particularly in the food, cosmetics, and home and personal care sectors, are currently produced from easily recyclable single materials such as polypropylene (PP) and polyethylene (PE). A very well-developed recycling infrastructure for polypropylene and polyethylene already exists worldwide.

[0010] However, a disadvantage of film bags, especially film bags with a detachable edge, is that they cannot be resealed. Besides the obvious disadvantage that these already opened film bags are difficult to transport, the contents of the opened film bag are also exposed to a greater risk of, for example, questionable hygienic contamination and microbial infestation, as well as faster oxidation.

[0011] Film bags with a retractable nozzle that can be closed again, also known as a “nozzle”, alleviate at least part of the problem described above. However, they also lack reproducible dosing capability, which greatly limits the application possibilities of film bags.

[0012] Although conventional dispensing pumps for film bags overcome this disadvantage, they consist of a large number of components, usually made of different materials, and therefore cannot be used economically for packaging inexpensive products in bulk. Recycling is also more difficult when different materials are used.

[0013] A dosing pump made of a single material, which is very economical to manufacture and forms a single-material system together with the surrounding film bag, can be recycled very efficiently, as the components do not need to be separated from each other for recycling.

[0014] A challenging task in the design of this dosing pump integrated into a film bag, which is made of a single-material PP or PE, is to create a robust construction that maintains its mechanical properties throughout the application cycle and functions flawlessly even after prolonged use. This means that the flexible elements of the dosing pump, which are repeatedly deformed when the dosing pump is activated, must have a defined holding force or restoring force, even after prolonged or frequent use, and must not deform plastically. Plastic deformation can, for example, lead to a reduction in the dosing quantity, Petition 870250087246, dated 09 / 26 / 2025, page 12 / 54 3 / 26 due to impaired tightening or jamming of the dosing device and therefore to malfunction.

[0015] The technical challenges mentioned above are seen as the main reason why dispensing devices for film bags have not yet managed to establish themselves in the market.

[0016] One of the tasks to be solved by the invention is, therefore, to provide a dosing device for liquid and fluid products that is improved, especially in the points mentioned, and that has low complexity, simple and efficient manufacturing capability with low material consumption, robust functionality and good recyclability.

[0017] To solve the tasks mentioned above, a dosing pump with the characteristics of independent patent claim 1 and a container with the characteristics of independent patent claim 15 are proposed.

[0018] It should be noted that the features listed individually in the claims can be combined with each other in any technically convenient manner and demonstrate other embodiments of the invention. Furthermore, the description characterizes and specifies the invention, especially in connection with the figures. The features described in relation to the dosing device according to the invention may also be advantageous embodiments of the container or system according to the invention and vice versa.

[0019] It should also be noted that the conjunction “and / or” used in this document between two resources and linking them together should always be interpreted in such a way that, in a first modality, only the first resource can be present, in a second modality, only the second resource can be present, and in a third modality, both the first and the second resource can be present.

[0020] As mentioned, this disclosure refers to a dosing device, hereinafter also called a dosing pump, for integration into a container.

[0021] The metering pump comprises a pump housing with a pump chamber. The pump housing also has a pump inlet and a pump outlet. The pump chamber is delimited by a pump chamber base and an elastically deformable pump dome. Petition 870250087246, dated 09 / 26 / 2025, page 13 / 54 4 / 26

[0022] If the elastically deformable pump dome is pressed when the metering pump is activated while the fluid connection from the pump inlet to the pump chamber is closed, fluid will be carried from the pump chamber to the pump outlet or out of the pump outlet due to the reduction in volume in the pump chamber. The fluid connection can be sealed, for example, by the pump inlet being covered by a wall (or film) of the container that rests on the metering pump when the pump dome is pressed. Alternatively or additionally, a non-return valve, often also called a check valve, can be provided in the fluid connection between the pump inlet and the pump chamber.

[0023] As soon as the pump dome elastically returns to its original state, the pump chamber fills again with fluid, which flows from the direction of the pump inlet or is drawn there.

[0024] The base of the pump chamber may be rigid, i.e., inflexible, or, in some embodiments, flexible. The pump housing is designed with thin walls. A pump casing is considered to have “thin walls” if most (>50%) of the surface, especially in areas with homogeneous wall thickness, has a material thickness of less than 3 mm, particularly less than 1.5 mm, preferably less than 0.8 mm.

[0025] The pump casing can be joined from a first section of the pump casing and a second section of the pump casing. The pump dome is then a component of the first section of the pump casing and the base of the pump chamber is a component of the second section of the pump casing.

[0026] The metering pump also has an outlet valve. The outlet valve is arranged in a fluid connection from the pump chamber to the pump outlet and is designed as a backflow preventer. On the one hand, a backflow preventer between the pump chamber and the pump outlet helps to increase the efficiency of the pump. On the other hand, it also prevents ambient air from being drawn into the fluid connection or the pump chamber. This is advantageous from a hygiene standpoint and can extend the shelf life of a product being pumped with the metering pump.

[0027] A dosing pump like the one described above can be manufactured particularly easily and efficiently in just a few steps. The material requirement is very low. In addition to the price, this also reduces energy consumption and emissions. Petition 870250087246, dated 09 / 26 / 2025, page 14 / 54 5 / 26 CO2 and plastic waste compared to other packaging solutions with more complex dosing devices.

[0028] The dosing pump according to the invention allows for the economical packaging of fluid mass products and therefore expands the application possibilities of thin-walled containers, especially film bags. The film bag with the integrated dosing pump according to the invention can replace standard bottles with dosing devices in various fluid product sectors as a more favorable and environmentally friendly alternative. A dosing pump integrated into the container is also particularly advantageous from a hygiene standpoint.

[0029] Other advantageous embodiments of metering pumps according to the invention result from the features specified in the subsections and the features described below.

[0030] The first section of the pump housing and the second section of the pump housing can be designed together as an integral component and connected by means of a film hinge. Advantageously, the integral component has no recesses in a defined demolding direction, from the separation plane of the injection molds. On the one hand, this aspect considerably simplifies the manufacturing process and the tooling required. On the other hand, the handling of semi-finished products is also simplified, as the integral component only needs to be folded at the film hinge. This also facilitates the relative positioning of the first section of the pump housing and the second section of the pump housing. At the same time, the number of parts to be handled is reduced.

[0031] Alternatively, the metering pump according to the invention can be assembled with two or three components, preferably no more than five. The first section of the pump housing and the second section of the pump housing are manufactured as separate components. Even with separate production, it is advantageous that the components have no or only small recesses in at least one defined demolding direction. Thus, the components can be easily manufactured and demolded.

[0032] The first section of the pump casing and the second section of the pump casing may be made of a thermoplastic material or consist of such material and be welded together at a joint. Laser transmission welding or ultrasonic welding, for example, are particularly suitable for this purpose. The Petition 870250087246, dated 09 / 26 / 2025, page 15 / 54 6 / 26 Thermoplastics are readily and cheaply available, can be recycled very easily, and have material properties that are very suitable for the application.

[0033] Alternatively, the first section of the pump casing and the second section of the pump casing can be connected to each other by means of a positive fit, for example, by means of a plug or press-fit connection. For example, the first section of the pump casing and the second section of the pump casing can have corresponding circumferential sealing profiles, such that each of the sealing profiles has corresponding locking geometries and a corresponding internal or external sealing surface. At least one of the sealing profiles is elastically prestressed so as to press against the other sealing profile, and the contacting sealing surfaces form a circumferential seal. This design means that a pump casing joined by means of a positive lock can still be manufactured to be leak-proof.

[0034] This type of connection is also particularly fast and energy efficient to produce.

[0035] The dosing pump can therefore be manufactured entirely from a flexible plastic material using the plastic injection molding process, vacuum pressing process, thermoforming process, injection and blow molding process or other suitable processes.

[0036] The outlet valve may have a closing portion and a sealing seat corresponding to the closing portion. From now on, the sealing seat is also referred to as the exhaust valve seat.

[0037] Preferably, the closing part of the outlet valve can be mounted on a pre-tensioned outlet valve diaphragm.

[0038] In at least some embodiments, the outlet valve diaphragm has a substantially conical shape or is curved toward the outlet valve seat.

[0039] The pre-tensioning of the outlet valve membrane and its specific design ensure a reliable seal. This type of outlet valve, also called a "disc valve" in the context of disclosure, is particularly suitable for low viscosity liquids.

[0040] In addition, preferably, the closing piece and the diaphragm of the outlet valve may be an integral part of the first or second section of the pump housing. Petition 870250087246, dated 09 / 26 / 2025, page 16 / 54 7 / 26 and the sealing seat may be an integral part of the other section of the pump casing, i.e., the second or first section of the pump casing.

[0041] In some variants, the closing part of the outlet valve may include a sealing surface and a sealing bead around the sealing surface. Optionally, the sealing seat of the outlet valve may also have an annular weave corresponding to the sealing bead. When the outlet valve is closed, the weave in the sealing bead is in contact with the closing part on at least one side and preferably on both sides.

[0042] According to another advantageous aspect, the metering pump may have a retaining cord and / or a diaphragm collar, wherein the retaining cord and / or the diaphragm collar surrounds the outlet valve diaphragm and is positioned and / or guided by a corresponding centering ring. The outlet valve diaphragm guide improves the tightness of the outlet valve.

[0043] Alternatively, the outlet valve may also be designed as a “hose valve”. A hose valve, according to the understanding of the present disclosure, is formed by a section of elastic hose collapsed in the resting state, wherein the hose section is cooperatively formed by a region of the first section of the pump housing and a region of the second section of the pump housing and is fluid-tight in the collapsed state. Hose valves are preferably used for dispensing highly viscous products.

[0044] The dosing pump may optionally have another backflow prevention device at the fluid connection from the pump chamber to the pump outlet. The additional check valve may, in particular, be an additional check valve connected in series with the outlet valve in fluid communication. The reliability of the seal is increased by multiple levels of sealing in series. This reduces the risk of fluid unintentionally escaping from the dosing pump or container or of air unintentionally entering the container. The additional check valve may be a second outlet valve. The second outlet valve may then have a design comparable to that of the first outlet valve.

[0045] In some variants, the outlet valve at the bottom of the pump chamber has a free outlet opening, in particular a spray nozzle. Low viscosity liquids can be applied quickly and evenly over relatively large areas using a spray nozzle. Petition 870250087246, dated 09 / 26 / 2025, p. 17 / 54 8 / 26

[0046] In some variants, the metering pump may have one or more reed valves arranged around the circumference of the pump dome as inlet valves. This can reduce the refill speed of the metering pump, especially for highly viscous products.

[0047] For example, an opening may be formed in a wall of the first and / or second section of the pump casing in the pump chamber area, with the other section of the pump housing having a flexible valve blade that corresponds to the opening and firmly covers the opening from the inside in the undeformed state. Additional inlet valves reduce the duration of pump dome depressurization after an application process.

[0048] In preferred embodiments, the pump dome may have what is called a decompression ring. The decompression ring consists of a plurality of decompression teeth designed and arranged at a distance from each other in a ring around the pump inlet, so that two adjacent decompression teeth form a decompression channel between them.

[0049] Decompression teeth are elevations / protrusions on the outer surface of the pump dome that are so high and have such small radii that they form gaps between the pump dome and the container wall / film surrounding the metering pump. Pressure equalization can occur at any time through the decompression channels, even if the container / film bag surrounding the dome is pressed directly against the pump dome.

[0050] In advantageous embodiments, the decompression channels can become flatter towards the pump inlet and the decompression teeth can join to form a one-piece annular sealing surface profile around the pump inlet. This type of decompression crown has proven to be particularly easy to use. The pump inlet in a decompression crown can also be fitted with a leaf-shaped stop. The film stop reduces the risk of damage to the film during operation.

[0051] The decompression crown can also be surrounded by a crown spring. The crown spring increases operability.

[0052] Preferably, the pump dome may have pump dome ribs and / or one or more areas with a reduced wall thickness. From the pump inlet, the ribs may extend outwards from the pump inlet onto the surface of the Petition 870250087246, dated 09 / 26 / 2025, page 18 / 54 9 / 26 pump dome and can be omitted in areas with reduced wall thickness. These features reduce the risk of the pump dome jamming and rendering the metering pump unusable, at least temporarily.

[0053] According to another advantageous aspect, the pump dome may have at least one circumferential spring strip and, preferably, several spring strips arranged concentrically. The spring strips may have a thinner material than the rest of the pump dome. The spring strip enhances the tactile / haptic sinking function and behavior of the pump dome.

[0054] The pump inlet can be arranged in the center of the pump dome. With these variants, the pump inlet is covered by the wall / sheet of the pressed container when the pump dome is pressed. A separate inlet valve as a backflow prevention device can be omitted in this case.

[0055] Alternatively, the pump inlet can be arranged off-center in the pump dome.

[0056] In other variants, the pump inlet may be located elsewhere or outside the pump chamber. The metering pump includes an inlet valve, which is arranged in a fluid connection from the pump inlet to the pump chamber and is constituted as a backflow preventer.

[0057] The backflow preventer in the fluid connection between the pump inlet and the pump chamber ensures that the liquid or fluid product is transported in the correct direction.

[0058] In addition, the bottom of the pump chamber may have one or more reinforcing ribs as an alternative to reinforcing ribs to increase rigidity and at the same time save material.

[0059] In some embodiments, the first section of the pump compartment and the second section of the pump compartment have congruent alignment geometries.

[0060] For example, they may include centering pins or cones and corresponding holes, or a surrounding groove and a corresponding tab. This simplifies the precise alignment of the pump housing sections.

[0061] In addition, the first and second sections of the pump casing may have corresponding attachment areas to form a snap-fit ​​connection in order to join the pump casing sections in a snug manner. For example, the attachment areas may Petition 870250087246, dated 09 / 26 / 2025, page 19 / 54 10 / 26 having one or more locking tabs, locking eyelets, positioning rings, positioning pins and / or edges for attaching behind or their counterparts.

[0062] Among other things, the positioning pins perform a retention and positioning function, as they fit into the corresponding fitting cylinders and create a ring fitting connection, but at the same time, they also ensure the relative alignment of the components, especially so that the membrane is correctly seated, which is important for airtightness.

[0063] Preferably, the first and second sections of the pump casing also have corresponding circumferential sealing profiles.

[0064] According to another advantageous aspect, the pump compartment may have at least one bacteriostatic, bactericidal or fungicidal element, which is preferably arranged in a fluid connection from the pump chamber to the pump outlet.

[0065] In some embodiments, the metering pump may include a leak protection device. The leak protection is then configured to seal a fluid connection between the pump chamber and the pump outlet. The leak protection is designed so that it can be removed, loosened, or mechanically destroyed by a user to release the fluid connection.

[0066] According to another advantageous aspect, the pump housing may include a cover to reversibly close the pump outlet. The cover may be designed as a foot cover, i.e., have a flat contact surface and a geometry such that the container can be placed “upside down” on the cover.

[0067] Preferably, the metering pump includes a weldable base that can be welded onto a film bag, like a commercially available weld nozzle.

[0068] In some variants, a hinged cover may be disposed of on the welded base. In addition, a tamper-evident indicator may be molded into the welded base, which has a thin detachable flag and a locking geometry at the end. The hinged cover may have a corresponding locking geometry, designed so that the tamper-evident indicator is irreversibly locked into the locking geometry when the hinged cover is first closed, and the flag is destroyed when the hinged cover is first opened. Petition 870250087246, dated 09 / 26 / 2025, page 20 / 54 11 / 26

[0069] Furthermore, in at least some embodiments, a tamper-evident indicator is formed on the weldable base of the dosing pump, which has a thin detachable flag and a locking geometry at its end; furthermore, the hinged cover has a corresponding locking geometry, which is formed in such a way that the tamper-evident indicator is irreversibly attached to the locking geometry when the hinged cover is first closed, and the flag is destroyed when the hinged cover is first opened.

[0070] The dosing pump described above must be placed in a thin-walled container and welded to the container.

[0071] This disclosure also refers to a container with an integrated dosing pump.

[0072] Preferably, the container and the dosing pump are made of the same thermoplastic material or a similar material.

[0073] The containers can be sheet-shaped paper bags. Alternatively, the container can also be a thin-walled plastic container, in which the wall has a material thickness so rigid that it is no longer commonly understood as a film (e.g., from a wall thickness of approximately 0.3 mm), but comprises at least locally limited flexible areas. The flexible areas can be provided by means of junction cords with a reduced wall thickness, for example. These thin-walled containers are also known as “thin-wall packaging” and are used, for example, for cleaning and personal care products. In principle, the container can be used to dispense fluid products from areas such as perfumery, cosmetics, pharmaceuticals, hygiene, personal care, household care, food (especially beverages and dairy products), food supplements, technology, and other areas.

[0074] Containers can be sealed edge bags, doypacks, flowpacks, flat bags, Euro hole tubular bags, chain bags, contour bags, gusseted bags, bag-in-box bags, easy packs, block bottom bags and other types of film bags, as long as they are film bags. Alternatively, containers can also be made of thin-walled plastic, but this material is too stable to qualify as film. Containers of this type have elastic areas, for example, through seams. Petition 870250087246, dated 09 / 26 / 2025, page 21 / 54 12 / 26

[0075] Other features and advantages of the invention are evident from the following description of the non-limited embodiments of the invention, which are explained in more detail with reference to the drawings. These drawings show schematically:

[0076] Fig. 1 is a perspective view of a metering pump in an unassembled state;

[0077] Fig. 2A: vertical cross-sectional view of a variant of the dosing pump to illustrate the drive process;

[0078] Fig. 2B: top view of the decompression crown of the dosing pump;

[0079] Fig. 3: vertical cross-sectional view of a variant of the metering pump dome;

[0080] Figures 4A, 4B Vertical cross-sectional views of a metering pump leaf inlet valve in the closed and open states;

[0081] Fig. 5 An exploded perspective view of another dosing pump;

[0082] Figures 6A, 6B vertical cross-sectional views of the metering pump hose valve of Fig. 5 in a closed state and in an open state;

[0083] Figures 7A, 7B, 7C Vertical sectional views of hose valve variants;

[0084] Figures 8A, 8B perspective views of hose valve variants;

[0085] Fig. 9 Perspective view of another dosing pump;

[0086] Fig. 10A: front view of a dosing pump with a foot frame;

[0087] Fig. 10B: side cutaway view of the dosing pump with the lid open;

[0088] Fig. 10C: side cutaway view of the dosing pump with the lid closed;

[0089] Fig. 11A: cutaway view of a dosing pump with a side outlet;

[0090] Fig. 11B: bottom view of the dosing pump with the side outlet.

[0091] To avoid unnecessary repetition, identical parts or parts that act similarly – even in different modalities – are given the same reference symbols and are described once, unless their function and effect are already clear in the description above together with the illustration. Therefore, the differences between the embodiments are emphasized below.

[0092] Fig. 1 shows a metering pump 1 in an open and unassembled state. The metering pump 1 comprises the lower part 2 (also called the second section of the pump housing) and the upper part 3 (also called the first section of the pump housing). The two sections 2 and 3 of the pump housing can be manufactured by means of plastic injection molding or other methods. Petition 870250087246, dated 09 / 26 / 2025, page 22 / 54 13 / 26 commercially available, for example, made of polypropylene, polyethylene, other suitable thermoplastics or polymers in general and, in particular, environmentally friendly pseudoplastics or bioplastics.

[0093] The lower part 2 consists of a pump chamber base 5 and a valve chamber base 7, in which a passage orifice with associated seal or valve seat (preferably in the center) is disposed. The valve seat may also be called the exhaust valve seat 400. A spring 407 acting as a centering ring essentially surrounds the valve chamber base 7. An intermediate channel 408 extends from the pump chamber base 5 to the valve chamber base 7. Two positioning pins 405 are disposed on either side of the intermediate channel 408 and are preferably designed as snap-fit ​​cylinders. The centering ring 407 is interrupted by the intermediate channel 408.

[0094] The foot 14 of the dosing pump 1, which can be sealed in a foil-shaped container / bag, is located in a front area of ​​the lower part 2. On its outer wall, it comprises a dispensing console that has a kind of extension or nozzle with a dispensing opening through which the fluid product is dispensed.

[0095] Although the dispensing opening is shown as a simple drip opening with a resealable cap 409, a sponge or brush attachment may also be provided in its place. This can be used to apply the liquid or fluid product to surfaces for cleaning or coating purposes, for example.

[0096] Alternatively, the dispensing opening can also be designed as a spray nozzle (see Fig. 11A). This spray nozzle can be used to apply the fluid product as a spray mist onto large surfaces, for example, as a disinfectant solution or a solution for medical or technical applications.

[0097] A stop 424 is formed at the base of the valve chamber 7. The stop 424, which is arranged laterally at the base of the pump chamber 5, limits the movement space of the pump dome 17 in the lower area and, due to its asymmetrical arrangement at the base of the pump chamber 5, causes the pump dome 17 to assume an inclined position at maximum deflection from its rest position. This prevents the pump dome 17 from jamming at maximum depression. The stop 424 can be designed Petition 870250087246, dated 09 / 26 / 2025, page 23 / 54 14 / 26 as a rib, for example, or preferably as a cord due to the constant thickness of the wall.

[0098] The base of the valve chamber 7 and the base of the pump chamber 5 are surrounded by an external sealing profile 413, which extends upwards as a wall from the edge area of ​​the second section of the pump housing and has a fitting edge in the end area.

[0099] The 403 retaining tabs extend radially outward on both sides of the valve chamber base 5.

[0100] In the area of ​​the base of the pump chamber 5, two openings are arranged opposite each other in the external sealing profile 413, which are also called the leaf valve windows 417. On the inside, in the direction of the pump chamber, behind the leaf valve windows 417, the leaf valve chambers 416 are formed on the edges of the base of the pump chamber 5 to receive the leaf valve blades 415 of the first section of the pump casing 3. The leaf valve stops 418 are formed in the leaf valve chambers 416 on the side of the pump chamber. In addition, the fastening hooks 433 are formed on both sides of the leaf valve window 417 in the external sealing profile 413 to ensure a robust and firm positive connection of sections 2 and 3 of the pump casing.

[0101] The number of inlet valves is determined primarily by the viscosity of the product to be dosed. The more inlet valves the dosing pump has, the less time it takes for the pump dome 17 to return to the idle state. The higher the viscosity, the more inlet valves must be provided. Depending on the viscosity of the product to be dispensed, the lower part of the pump chamber 5 may therefore have none, one, two or more blade valve windows 417.

[0102] The second section of the pump housing 2 (lower part) has a weldable base 14, with which the dosing pump 1 can be welded onto a film bag instead of a nozzle, for example. A hinged cover 409, which can reversibly close the pump outlet 16, is provided on the front part of the weldable base 14 of the dosing pump 1, facing outwards from the pump. The hinged cover 409 is connected to the weldable base of the dosing pump 14 by means of a cover plate 410.

[0103] The upper part 3 (the first section of the pump housing) of the metering pump 1 illustrated comprises the pump diaphragm 17 (also referred to herein as Petition 870250087246, dated 09 / 26 / 2025, page 24 / 54 15 / 26 pump dome), in the center of which is arranged a filling opening 18 (also called pump inlet). In addition, the upper part 3 includes, in a position corresponding to the base of the valve chamber 7 in the lower part 2, an outlet valve (more specifically: a closing part 34 of the outlet valve) mounted in the center of an outlet valve membrane 401 (also called a “trigger valve”).

[0104] The outlet valve diaphragm 401 has a “shell and sag” shape towards the base of the valve chamber 7, i.e., it can be described essentially as an inverted dome, conical or funnel-shaped form. Due to its special shape, the outlet valve diaphragm 401 is pre-tensioned against the valve seat 400, so that the outlet valve diaphragm 401 reliably presses the closing piece 34 against the valve seat 400 and ensures good sealing of the outlet valve. The closing piece 34 has an upward-oriented conical base.

[0105] Pressure hooks 402 are provided on both sides of the outlet valve membrane 401, which fit into the corresponding fixing terminals 403 and ensure a firm and positive connection of the pump compartment sections.

[0106] The pump dome 17 and the outlet valve diaphragm 401 are enclosed by an inner sealing profile 412 as an extension of a circumferential fastening cord 419. The fastening cord 419 pre-tensions the inner sealing profile 412 against the corresponding outer sealing profile 413, so that, on the one hand, the inner sealing profile 412 engages with the engagement edge of the outer sealing profile 413 and, on the other hand, the sealing surfaces of the inner sealing profile 412 and the outer sealing profile 413 form a static contact seal.

[0107] In a section between the pump dome 17 and the outlet valve diaphragm 401, the fixing recesses 419 converge and together form a reinforcing rib 426. A pressure cylinder 404 is formed on both sides of the reinforcing rib 426. The connections of the pressure rings of the pressure cylinders 404 with the positioning pins 405, together with the intermediate reinforcing rib 426, ensure that the outlet valve system is firmly seated and, on the other hand, behaves independently of the pump chamber 11 with respect to deformation during actuation. Petition 870250087246, dated 09 / 26 / 2025, page 25 / 54 16 / 26

[0108] In the pump dome area 17, the internal sealing profile 412 is extended in sections and forms the downward-facing flexible valve leaves 415.

[0109] The outer side (facing outward from the pump chamber) of the pump diaphragm 17 also includes a decompression crown 39, which surrounds the filling opening 18.

[0110] Optionally, the ribs of the pump dome 411 are molded into the outer side of the pump dome 17. This increases the clamping force and spring stiffness of the pump dome 17. However, if suitable materials are selected, the ribs of the pump dome 411 can also be omitted. Preferably, the ribs of the pump dome can be unevenly distributed in the pump dome. In addition, the pump dome 17 can include a region with a reduced wall thickness 425 on one side. The resulting asymmetrical stiffness of the pump dome 17 results in an asymmetrical deformation of the pump dome during compression. The asymmetrical deformation reduces the risk of the pump dome 17 jamming or failing to return when compressed.

[0111] It was also found that the measures described above and / or a decentralized and laterally displaced decompression crown 37 can delay or prevent plastic deformation or “wear” during use, mainly for polyethylene, but in principle also for other plastics.

[0112] Fig. 2A shows a variant of the metering pump 1 in the assembled state, wherein the upper part 3 is connected to the lower part 2 by means of a snap-fit ​​connection.

[0113] When the upper and lower sections of pump compartments 2 and 3 are connected, two functional cavities are formed, namely, the pump chamber 11 and the valve chamber 12, with the two cavities communicating fluidically with each other by means of the transfer channel 408. The pump chamber 11 is formed between the base of the pump chamber 5 and the flexible pump dome 17, and the valve chamber 12 is bounded by the base of the valve chamber 7 and the outlet valve membrane 401.

[0114] For the metering pump 1 to function properly, sections 2 and 3 of the pump compartment must be connected to each other in a leak-proof manner to prevent the passage of fluids, i.e., hermetically sealed. This can be done by welding (as shown in Figures 5, 6, 8A, 8B, for example) or by means of a snap-fit ​​connection (as shown here). Petition 870250087246, dated 09 / 26 / 2025, page 26 / 54 17 / 26

[0115] For assembly, the first section of the pump housing 3 is inserted into the second section of the pump housing 2 so that the inner sealing profile 412 (which surrounds the first section of the pump housing 3) fits into the outer sealing profile 413 (which surrounds the second section of the pump housing 2) as a click, latch or snap-fit ​​connection.

[0116] Although the inner sealing profile 412 and its fastening step 443 are wider in cross-section than the outer edge of the negative fastening profile 444 of the outer sealing profile 413, the entire inner sealing profile 412 is deformed during the assembly process and inserted into the outer sealing profile 413 so that the components fit together. The elastic deformation of the inner sealing profile 412 is possible mainly due to the high flexibility of the fastening cord 419, which pretensiones the inner sealing profile 412 against the outer sealing profile 413.

[0117] Due to its pre-tension, the inner sealing profile 412 expands again immediately after insertion into the outer sealing profile 413, resulting in a connection between the fastening step 443 and the negative fastening profile 444.

[0118] To facilitate the insertion of the first section of pump compartment 3 into the second section of pump compartment 2, the lower edge of the internal sealing profile 412 has a wedge shape.

[0119] In the positive locking connection 429 of the pump housing sections, the outer wall of the inner sealing profile 412 comes into contact with the inner wall of the outer sealing profile 413, so that this circumferential contact surface effectively seals the connection.

[0120] The pressure generated in the cavities of the dosing pump 1 during actuation presses the internal sealing profile 412 against the external sealing profile 413, in addition to the pre-tensioning force, so that the contact surface between the internal sealing profile 412 and the sealing profile 413 is sealed in a self-reinforcing manner. The perfectly fitted connection of the fixing stage 443 and the negative fixing profile 444 prevents vertical disengagement of the two sections 2 and 3 of the pump compartment.

[0121] The outlet valve diaphragm 401 formed in the first section of the pump compartment 3 is surrounded by a diaphragm collar 420. The diaphragm collar 420, in turn, is positioned by a centering ring 407, which is Petition 870250087246, dated 09 / 26 / 2025, page 27 / 54 18 / 26 formed in the second section of the pump housing 2. This allows for precise centering of the disc valve closing piece 34 in the outlet valve seat 400.

[0122] The flexible pump dome 17 is a component subject to high mechanical loads, which must be able to withstand various deformations at various temperatures during its service life without plastic deformation, loss of clamping force or jamming of the pump dome 17 at the lowest point.

[0123] In particular, the pump dome 17 must function reliably when PP or PE monomaterials are used, although flexible elements that move frequently have a high tendency to plastic deformation.

[0124] To avoid plastic deformation, loss of clamping force and jamming of the pump dome 17, the design of the pump dome 17 and the other components of the metering pump 1 must have a defined shape, specific wall thicknesses and predetermined proportions.

[0125] The pump dome 17 is therefore enclosed by a circumferential fastening cord 419. During actuation, the pump dome 17 expands outward in proportion to the compression in response to vertical compression. The fastening cord 419 is a flexible and resilient area that allows the edge of the pump dome 17 to expand outward with little resistance. Thus, the fastening cord 419 avoids the risk of jamming of the pump dome 17 and the required actuation force. This is particularly advantageous for older operators and children as it simplifies use.

[0126] For the pump dome 17 to function properly, especially if it is made of softer materials such as polypropylene, the pump dome 17 must have a design or geometry that has good clamping force, does not lead to plastic deformation, and does not cause pinching. In the drawing, the outer diameter is marked with “B” and the height or depth of the vertical deformation is marked with “A”. The following parameters of the pump dome 17 ensure optimal functionality.

[0127] The preferred ratio between the outer diameter “B” and the height of the vertical deformation “A” of the pump dome 17 is between 1:3 and 1:9. Ratios of 1:5 to 1:7 are particularly preferred. With an exemplary ratio of 1:6. This means that if the outer diameter of the pump dome 17 is, for example, 50 mm, the allowable height of the vertical deformation for softer materials, such as polyethylene, is approximately 8 mm. Petition 870250087246, dated 09 / 26 / 2025, page 28 / 54 19 / 26

[0128] The wall thickness of a pump dome 17 made of polyethylene may be between 0.3 mm and 1.5 mm, preferably between 0.6 mm and 1.1 mm. In addition, the profile of the pump dome 17 for softer materials, such as polyethylene, may have a slightly outward curved, conical or dome-shaped form.

[0129] In addition, the dosing pump 1 includes a hinged cover 409, which is connected to the welded base 14 by means of a hinged cover tab 410. Sometimes the weldable foot is also called a “weld nozzle” or simply a “welded nozzle”.

[0130] The back wall of the hinged lid 409 and the lid flap 410 are formed and arranged during production so that they are designed without recesses in a demolding direction from the injection molds. The weldable foot 14 of the embodiment of the dosing pump 1, as shown in Fig. 1, for example, is molded without an open side of the outlet channel. This has the advantage of facilitating sealing on the film bag, as the dosing pump is sealed like a standard nozzle and the tightness of the seal is more guaranteed. The weldable foot 14 can be dimensioned significantly flatter than the weld nozzles of standard models on the market, as a large diameter outlet is not required for dosing due to the dosing pump.

[0131] Fig. 2B shows in detail a top view of the decompression crown 39 of the metering pump 1.

[0132] The decompression crown 39 comprises a plurality of decompression teeth 24, which are formed and arranged at a distance from each other in a ring around the pump inlet 18, so that two adjacent decompression teeth 24 form a narrow decompression channel 25.

[0133] The decompression teeth 24 each have an essentially triangular or shoe-shaped base area, which narrows towards the pump inlet. The upper surfaces of the decompression teeth 24 facing outwards from the pump chamber form an essentially shell- or funnel-shaped contour. The diameter of the decompression crown 39 corresponds approximately to the width of a finger and is therefore between 0.5 cm and 2.5 cm, preferably approximately between 1 cm and 2 cm.

[0134] The decompression channels 25 each have a substantially triangular base area, which widens towards the pump inlet 18. As the width of the compression channels 25 increases, the channel depth decreases. Petition 870250087246, dated 09 / 26 / 2025, page 29 / 54 20 / 26 simultaneously, so that the free cross-section of the decompression channels 25 (flow slots) does not necessarily remain constant in the direction of flow, but at least remains similar. In the area of ​​the pump inlet 18, the decompression teeth 24 converge and join to form a one-piece annular sealing surface profile 422 that completely surrounds the edge of the pump inlet 18.

[0135] In other words, the decompression channels 25 are narrower at the radially outer edges and the decompression channels 25 become wider in the regions of the sealing surface profile 422. This shape protects the top film 160 from damage and ensures easy flow. Wider channels would damage the top film 160 with their edges.

[0136] After activation, the decompression crown 39 and the decompression channels 25 formed by it ensure that the top film of the film bag cannot adhere to the dosing pump 1 and thus interrupt the volume flow towards the pump inlet 18.

[0137] A film stop 427 is formed in the center of the pump inlet 18. This prevents excessive deformation of the film when it is pressed into the filling opening 18 and therefore damage to the top film 160.

[0138] The decompression crown 39 performs the following three tasks: It serves as an actuation point for the dosing pump 1, as a filling opening, and as protection against accidental (unwanted) actuation of the dosing pump 1, for example, during transport.

[0139] In the sectional views of Figures 2A, 3, it is also possible to see that the decompression crown 39 is surrounded by a crown spring cord 431. Thanks to its flexible design, the crown spring cord 431 prevents the formation of cracks between the pump dome 17 and the decompression crown 39 during and after actuation. In addition, the articulated connection reduces the required actuation force.

[0140] An advantageous variant of the decompression crown 39 projects with its decompression teeth 24 between 1 mm and 8 mm, preferably approximately 2-5 mm, more preferably approximately 2-5 mm. The specified extension describes the height of the transition from the pump dome 17 to the decompression crown to the highest point of the decompression teeth 24. This increases the actuation point, creating space for longer nails. This is particularly advantageous for users in cosmetic applications and ensures greater comfort. Petition 870250087246, dated 09 / 26 / 2025, page 30 / 54 21 / 26

[0141] In the illustration shown here, the entrance to bomb 18 is located in the center of the dome of bomb 17.

[0142] In the actuation process, the user presses the decompression crown 39 with the fingertip or through the upper film 160. The upper film 160, which is located between the decompression crown 39 and the fingertip, is deformed in such a way that the upper film 160 comes into annular contact with the sealing surface profile 422, thus creating a seal of the pump inlet 18 (filling opening).

[0143] The film stop 427 is arranged by means of two stop legs 428 within the pump inlet 18 of the decompression crown 39, wherein the film stop 427 is located in the center of the pump inlet 18 and is below the level of the sealing surface profile 422. The film stop limits the deformation of the top film 160, which prevents plastic deformation or deformation of the top film 160 (i.e., damage).

[0144] The stop legs 428 can be designed according to requirements, for example, as zigzag (meander) type spring legs, so that the film stop 427 can be higher than the level of the sealing surface profile 422. During actuation, the user's fingertip, together with the upper film 160, presses the flexibly mounted (spring-loaded) film stop 427, which leads to the sealing of the sealing surface profile 422. As soon as the finger pressure is released, the film 160 is lifted again by the spring-loaded film stop 427, which speeds up the filling process.

[0145] This diameter of the sealing surface profile 422 allows for a seal when operated even with the smallest fingertips and, at the same time, the pump inlet 18 is still large enough for a sufficiently fast filling process of a not very viscous liquid.

[0146] Fig. 3 shows a vertical cross-sectional view of another design variant of the pump dome 17. The structure of the metering pump 1 can be seen as described above. A decompression crown with decompression teeth 24 is disposed in the pump dome. The decompression crown is surrounded by a circumferential crown spring cord 431. The pump dome also has a greater curvature 434 than the metering pumps 1 illustrated previously. Petition 870250087246, dated 09 / 26 / 2025, page 31 / 54 22 / 26

[0147] A pump dome designed in this way is particularly suitable for harder materials, such as polypropylene, achieving comfortable operation with a comparatively low actuation force.

[0148] The retaining connection 429 of the first and second sections of the pump housing 3, 2 is also shown in detail. The first section of the pump housing 3 and the second section of the pump housing 2 have corresponding circumferential sealing profiles 412, 413, such that the sealing profiles 412, 413 have corresponding locking geometries 443, 444 and a corresponding internal or external sealing surface. At least one of the sealing profiles 412, 413, in this case the sealing profile 412 of the first section of the pump housing 3, is elastically prestressed by a circumferential retaining cord 419, so that it presses against the other sealing profile 413 and the contacting sealing surfaces form a circumferential seal.

[0149] Figures 4A and 4B show vertical cutaway views of a sheet 430 inlet valve of metering pump 1 in the closed and open states.

[0150] The inlet leaf valve 430 comprises a flexible valve leaf 415 extending from the lower edge of the inner sealing profile 412 of the first section of the pump housing 3 towards the second section of the pump housing 2.

[0151] In the second section of the pump housing 2, other elements of the leaf-shaped inlet valve 430, such as the leaf-shaped inlet valve windows 417 and the leaf-shaped valve chamber 416, are formed by a leaf-shaped valve stop 418.

[0152] When assembling sections 2 and 3 of the pump compartment, the valve blade 415 is inserted into the valve chamber of the blade 416 so that the valve blade 415 is positioned on the side of the pump chamber 11, behind the valve window of the blade 417. The valve blade 415 is wider than the valve window of the valve blade 417. This creates the sealing contact surface between the edges of the front wall of the valve blade 415 and the back wall of the valve window of the blade 417.

[0153] As soon as the metering pump 1 is activated for application or dosing, the pressure generated in the pump chamber 11 presses the leaf valve 415 against the inner wall of the leaf valve window 417, which causes the inlet leaf valve 430 or inlet leaf valves to be sealed. Petition 870250087246, dated 09 / 26 / 2025, page 32 / 54 23 / 26

[0154] Fig. 4B shows how, after dosing in the pump chamber 11, a negative pressure is created by the restoring force, which bends the flexible leaves of the valve 415 inward. The negative pressure opens the flow path of the product from the main volume of the bag 162 to the pump chamber 11. The reed valve stop 418, which is molded into the reed valve clamp 416, serves to limit the bending of the valve reed 415 in order to prevent plastic deformation.

[0155] Fig. 5 shows an exploded perspective view of another variant of the metering pump design. This is particularly suitable for metering highly viscous products.

[0156] The outlet valve is formed here by a section of elastic hose collapsed by the internal stresses existing in the resting state, which is formed cooperatively by a region 436 of the first section of the pump casing 3 and a region 437 of the second section of the pump casing 2 and is airtight to the fluid in the collapsed state.

[0157] An antechamber 439 is formed between the pump dome 17 and the hose section. In this embodiment, the first section of the pump casing 3 and the second section of the pump casing are welded and have corresponding weld contours 438 on the edges.

[0158] An outlet tract 421 is formed at the end of the hose section on the side of the second section of the pump housing 2 that is away from the pump chamber 11. In addition, the front part of the second section of the pump housing 2 is provided with a metering pump base 14 that can be welded on.

[0159] In the assembled metering pump 1, that is, when the two sections of the pump casing 2 and 3 have been welded together at the welding contours 438, three or four functional cavities are formed. The first cavity is the pump chamber 11, the second cavity is the pre-chamber 439 and the third cavity is a hose valve channel 440, which, however, only opens when the metering pump is activated in the hose section and otherwise remains closed. The fourth cavity is the outlet tract 421.

[0160] Figures 6A and 6B show vertical cutaway views of hose valve 435 of metering pump 1 in a closed and open state. Metering pump 1 is welded into a film bag.

[0161] The metering pump 1 is welded inside the film bag, that is, between the upper film 160 and the lower film 161. The upper film 160 and the lower film 161 are Petition 870250087246, dated 09 / 26 / 2025, page 33 / 54 24 / 26 glued to foot 14 of dosing pump 1 to be welded in welding areas 438. The dispensing console is located outside the film bag 100.

[0162] In the closed state, the smooth inner wall of the upper hose valve blade 436 is in contact with the smooth inner wall of the lower hose valve blade 437, so that the path between the outlet tract 421 and the pre-chamber 439 is interrupted or sealed at that point. The hose valve blades 436 and 437 are flexible and, moreover, are pressed together under the pressure of the inner bag.

[0163] When the metering pump 1 is activated, a higher pressure is created in the pump chamber 11 and in the pre-chamber 439 than in the volume of the main bag 162. As a result, the hose section formed by the hose valve blades 436, 437 expands against the internal stresses and the hose valve channel 440 opens. The metered liquid passes through this hose valve channel 440 via the outlet 421 through the pump outlet 16 to the outside and can be applied. After the metering pump is activated and the pressure consequently decreases, the flexible hose valve blades 436, 437 return to their original shape due to the inherent internal stresses, which leads to the collapse of the hose section and a seal at the point of contact between the hose valve blades 436 and 437.

[0164] Figures 7A, 7B, 7C show vertical cutaway views of variants of the hose valve.

[0165] To increase the internal stresses of the hose valve leaves 436, 437 and the tightness of the hose valve, the two hose valve leaves 436 and 437 may have a bend, as shown in Fig. 7A.

[0166] Alternatively, hose valve blades 436 and 437 may be designed with a positive locking obstacle in the form of a spring groove 441, as shown in Fig. 7B.

[0167] Furthermore, the two valve blades of hose 436 and 437 can alternatively be bent into a dome or a spoon, see Fig. 7C.

[0168] Figures 8A and 8B show perspective views of other variants of the hose valve.

[0169] Alternatively, with the aim of increasing the residual stresses of the hose valve blades 436, 437, the outer walls of the hose valve blades 436, 437 may have a hose valve rib 442. For example, it may be a sinuous, spring-like rib, see 8A, and / or multiple ribs. Petition 870250087246, dated 09 / 26 / 2025, pp. 34 / 54 25 / 26 successively placed, similar to a zigzag pattern extending along the hose section, see 8B.

[0170] Fig. 9 shows a perspective view of another dosing pump. Regardless of the material choice, the pump dome 17, 434 can have a round, elliptical, rectangular, triangular, or other shape in horizontal projection. The perspective view in Fig. 9 shows, for example, an embodiment of the dosing pump 1 with two opposing pumping couplings 432. In other words, the lower part of the pump chamber has also been designed as a flexible pump dome. The upper pump dome 432 is provided with a decompression crown 39, including a pump inlet, while the lower pump dome has no pump inlet and therefore no pump dome. In the variant shown, both sections 2 and 3 of the pump housing are welded together at the weld contour 438. This design variant is suitable for smaller dosing quantities.

[0171] Fig. 10A shows a front view of a dosing pump 1 with a support structure. Fig. 10B shows a side cutaway view of the dosing pump 1 with the cover open. Fig. 10C shows a side cutaway view of the dosing pump 1 with the cover closed.

[0172] To allow a film bag to stand upright with the dosing pump 1, even if it is not a bag with a support base, for example, the dosing pump 1 may include a support structure 445. In the front plan view of Fig. 10A, the front side of the welded base 14 of the dosing pump 1 is illustrated with an open hinged cover 409. The hinged cover 409 is fitted with a support structure 445. The vertical support structure 445 surrounds the hinged cover 409. For greater material economy, saving windows 448 with material cutouts are formed in the vertical support structure 445.

[0173] A tamper-evident fastening tab 447 is formed on the underside of the welded base of the dosing pump, which is connected to the welded base of the dosing pump by means of a thin, detachable protruding portion.

[0174] In the cutaway view of Fig. 10C, the vertical bag is shown in the vertical frame 445, with the hinged lid 409 closed. When the hinged lid is closed during the assembly process, the clamp 446 forms a positive connection with the tamper-evident fastening tab 447. When the hinged lid is opened for the first time, the tamper-evident fastening tab 447 is separated from the welded base of the dosing pump and remains attached to the clamp 446. This makes it very easy to recognize if the film bag has already been opened. Petition 870250087246, dated 09 / 26 / 2025, page 35 / 54 26 / 26

[0175] Fig. 11A shows a cross-sectional view of a metering pump with a side outlet. Fig. 11B shows a bottom view of the metering pump with the side / bottom outlet.

[0176] The second section of the pump housing 2 has a distribution support at the bottom, in which a spray nozzle 32 is formed with a distribution opening 16.

[0177] The cross-sectional view in Fig. 11A and a bottom-up top view in Fig. 11B show another variant of the dosing pump 1 design with a downward-facing side outlet. This embodiment includes the outlet nozzle 32 (spray nozzle), which is located directly below the outlet valve 34. This embodiment of the dosing pump 1 is welded to the bottom film 161 of a film bag at the welding ring 449, wherein a film opening 450 is perforated or produced in the bottom film 161 at a corresponding point (in the center of the welding rings 449).

[0178] Obviously, the metering pump 1 can be welded in the reverse direction, i.e., alternatively to the top film 160.

[0179] This version of the metering pump 1 is particularly suitable for spraying low viscosity liquid products, such as glass cleaner. For dosing highly viscous products, a wide outlet opening with a large cross-section should be provided instead of the spray nozzle 32.

[0180] The outlet valve as a single element or the dosing pump as a whole can also be used for certain applications in doypacks (stand-up pouches), especially in the area of ​​the base of the packaging. In this case, this stand-up pouch includes an outlet valve or a dosing pump in the lower area, in particular at the base of the packaging, where the base folds are located that allow the packaging Petition 870250087246, dated 09 / 26 / 2025, page 36 / 54

Claims

1 / 3 CLAIMS 1. A dosing pump for integration into a container, the dosing pump comprising a pump housing, characterized in that the pump housing forms a pump chamber and has a pump inlet and a pump outlet, wherein the pump chamber is delimited by a pump chamber base and an elastically deformable pump dome, wherein the pump housing is joined by at least one first section of the pump housing and a second section of the pump housing, wherein the pump dome is a component of the first section of the pump housing and the pump chamber base is a component of the second section of the pump housing, wherein the dosing pump has an outlet valve, wherein the outlet valve is arranged in fluid communication from the pump chamber to the pump outlet and shaped as a backflow preventer.

2. A metering pump according to claim 1, characterized in that the outlet valve comprises a closing member and a corresponding outlet valve seat, the closing component being mounted in a pre-tensioned outlet valve diaphragm.

3. A metering pump according to claim 2, characterized in that the diaphragm of the outlet valve has a substantially conical shape or a curved shape in the direction of the outlet valve seat.

4. A metering pump according to any one of claims 2 or 3, characterized in that the closing member and the diaphragm of the outlet valve are integral parts of the first or second section of the pump housing and the seat of the outlet valve is an integral part of the other respective section of the pump housing.

5. Metering pump according to any one of claims 2 to 4, characterized in that the metering pump comprises a retaining cord and / or a diaphragm collar, wherein the retaining cord and / or the diaphragm collar surrounds the diaphragm of the outlet valve and are positioned and / or guided by a corresponding centering ring. Petition 870250087246, dated 09 / 26 / 2025, page 37 / 54 2 / 3 6. A metering pump according to claim 1, characterized in that the outlet valve is formed by a section of elastic hose retracted in the resting state, wherein the hose section is cooperatively formed by a region of the first section of the pump casing and a region of the second section of the pump casing and is airtight to the fluid in the retracted state.

7. A dosing pump according to claim 1, characterized in that the outlet valve at the bottom of the pump chamber has a free outlet opening, in particular a spray nozzle.

8. A metering pump according to any of the preceding claims, characterized in that in a wall of the first and / or second section of the pump casing in the region of the pump chamber, an opening is formed, wherein the other respective section of the pump casing towards the opening has a corresponding flexible valve blade in a non-deflected state that seals the opening from the inside.

9. A metering pump according to any of the preceding claims, characterized in that the first section of the pump casing and the second section of the pump casing have corresponding circumferential sealing profiles, such that each of the sealing profiles has mutually corresponding locking geometries and a corresponding internal or external sealing surface, and wherein at least one of the sealing profiles is elastically pre-tensioned, so that it presses against the other respective sealing profile and the mutually contacting sealing surfaces form a circumferential seal.

10. A metering pump according to any of the preceding claims, characterized in that the pump dome has a decompression crown, wherein the decompression crown comprises a plurality of decompression teeth that are formed in such a manner and are arranged annularly around a pump inlet, spaced from each other at least in certain regions, wherein two adjacent decompression teeth form a decompression channel between them, the decompression channels become flatter in the direction of the pump inlet, and the decompression teeth join to form a one-piece annular sealing surface profile around the pump inlet. Petition 870250087246, dated 09 / 26 / 2025, p. 38 / 54 3 / 3 11. A dosing pump according to claim 10, characterized in that the decompression crown has a leaf-shaped stop, the leaf-shaped stop being disposed inside the pump inlet.

12. Metering pump according to any one of claims 10 or 11, characterized in that the decompression crown is surrounded by a crown spring bead.

13. A metering pump according to any of the preceding claims, characterized in that the pump dome comprises a region with reduced wall thickness, wherein the region with reduced wall thickness is arranged asymmetrically in the pump dome; and / or wherein the pump dome comprises spring recesses and / or spring ribs, wherein the spring recesses and / or spring ribs extend with a radial portion outward from a pump inlet in the pump dome, optionally wherein the spring recesses and / or spring ribs are arranged unevenly in the pump dome.

14. A dosing pump according to one of the preceding claims, comprising a hinged lid, characterized in that a tamper-evident indicator is formed on the weldable base of the dosing pump, which has a thin detachable protruding portion and a locking geometry at its end; additionally, wherein the hinged lid has a corresponding locking geometry, which is formed in such a way that during the first closing of the hinged lid the tamper-evident indicator locks irreversibly into the locking geometry and that the protruding portion is destroyed during the subsequent first opening of the hinged lid.

15. Thin-walled container characterized in that it comprises an integrated dosing pump, as defined in any of the preceding claims. Petition 870250087246, dated 09 / 26 / 2025, pp. 39 / 54

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