EP3551343A1

EP3551343A1 - Pump and discharge device

Info

Publication number: EP3551343A1
Application number: EP17808857.1A
Authority: EP
Inventors: Swen Barenhoff; Detlef Schmitz; Bernhard Jasper
Original assignee: Aptar Dortmund GmbH
Current assignee: Aptar Dortmund GmbH
Priority date: 2016-12-12
Filing date: 2017-11-29
Publication date: 2019-10-16
Anticipated expiration: 2037-11-29
Also published as: US10953420B2; DE102016014898A1; US20190344297A1; EP3551343B1; WO2018108535A1; ES2883680T3; AR110339A1

Abstract

The invention relates to a pump (7) and a discharge device comprising a pump (7) for discharging a preferably liquid product, wherein the pump (7) comprises a spring sleeve (18) for a spring (16), which separates said spring (16) from the product, and/or the pump (7) comprises a sealed spring chamber (19) for a spring (16).

Description

Pump and dispenser

The present invention relates to a pump according to the preamble of claim 1 and to a dispensing device according to the preamble of claim 17.

The term "dispensing device" in the present invention is preferably to be understood as an apparatus for, in particular, spraying or dispensing of a preferably liquid product, particularly preferably as an aerosol.

Preferably, a dispenser according to the present invention comprises a container as a reservoir with for a product, a pump for conveying the product and a dispensing head for the particular spraying delivery of the product to a user. Preferably, a dispenser according to the present invention is manually operable or has a dispenser according to the present invention, a manual or hand-operated pump.

The term "pump" is to be understood in the present invention preferably a structural device which is designed to convey a product, in particular a fluid. In particular, by means of a pump, a product can be sucked from a container, placed under pressure and / or, for example, be delivered as an aerosol. Preferably, a pump according to the present invention as in particular hand-operated positive displacement pump, in particular metering pump, particularly preferably reciprocating pump, is formed, in particular wherein by (manual) actuation of the pump, in particular per stroke, a defined volume of the product is promoted or can be conveyed.

Preferably, a pump in the context of the present invention comprises a pump piston, a pump chamber, an inlet and an outlet, preferably wherein the inlet and the outlet are each occlusible by an associated valve. In particular, a defined volume of a product can be conveyed or sucked into the pump chamber by a stroke movement of the pump piston, can be pressurized in the pump chamber and can be released from the pump chamber via the inlet. For the purposes of the present invention, the term "product" is to be understood as meaning, in particular, fluids, such as liquids, suspensions or the like. For the purposes of the present invention, a product can be released, for example, as a paste, jet or mist or aerosol or in any other way, for example as a foam or gel.

DE 103 35 842 B4 discloses a dispensing device of the type mentioned, wherein the dispensing device comprises a pump, a container and a dispensing head. The pump has a pump housing, a pump chamber, a pump piston, an inlet valve and an outlet valve. Upon actuation of the dispensing device, the pump piston is pressed down or against the spring force of a spring arranged in the pump housing such that the volume of the pump chamber is reduced and thus the product is pressurized in the pump chamber. The pressure increase in the pump chamber opens the outlet valve so that the pressurized product is delivered to a user via the dispensing head.

The invention has for its object to provide an improved dispensing device and an improved pump for a dispensing device, in particular whereby or whereby a simple, stable, compact and / or inexpensive construction and / or hygienic delivery of the product or allows is supported / and / or the flow guidance in the pump is improved. The above object is achieved by a pump according to claim 1 or a dispenser according to claim 17. Advantageous developments are the subject of the dependent claims.

The proposed pump preferably has a pump housing, a pump piston, a pump chamber and a - in particular metallic - spring, preferably wherein the pump piston is biased by the spring into an initial position or against the spring force of the spring is movable, in particular to the product or a pre-defined volume of the product in the pump chamber to pressurize or to reduce the volume of the pump chamber.

One aspect of the present invention is that the pump has a preferably cylindrical and / or removable from the pump housing. parate - spring sleeve or -kapsei - preferably around the spring - has, wherein the spring sleeve or -kapsei the spring in particular completely encased and / or separated from the product, in particular such that the spring - in particular independent of a pumping or lifting movement of the pump piston - does not come into contact with the product. Particularly preferably, the spring sleeve or - capsule is designed as corrosion protection for the spring.

Preferably, the pump chamber extends - in particular like a ring - around the spring sleeve and / or the pump chamber is bounded laterally by the spring sleeve and the pump housing, preferably in such a way that the product is guided past the spring or can be guided past it.

Such a construction avoids the direct contact of the spring with the product or a possible reaction of the spring material with the product. In particular, the risk of corrosion of the spring is reduced and / or prevented that the spring corrodes or (thus) affects the product quality.

In addition, the requirements for the material quality of the spring can be reduced. In particular, it is no longer necessary by the spring sleeve to treat the surface of the spring to protect against corrosion. In this way, a particularly cost-effective design of the pump is possible or supported.

In addition, such a design prevents the spring from forming a (direct) flow resistance for the product. In particular, any turbulence or flow losses that occur in direct contact between the spring and the product are reduced. The spring sleeve thus allows a particularly simple or low-loss flow guidance in the pump, preferably without strong deflections, for example of more than 90 ° or 120 °. In this way the efficiency of the pump is increased.

According to a further, independently realizable aspect of the present invention, the pump has a sealed or closed spring chamber for receiving or supporting the spring, preferably wherein the spring is arranged in the spring chamber and / or the spring chamber is sealed independently of a lifting movement or is closed, in particular such that the spring chamber is not flowed through by the product or can be flowed through. special Preferably, the spring chamber is filled with a gas, in particular air. In this way, corresponding advantages are realized.

Preferably, the spring chamber is formed by the spring sleeve or limited to the outside or to the pump chamber.

Preferably, the spring sleeve is formed in several parts and / or telescopic or compressible, in particular such that the spring chamber or the spring in the spring chamber is compressible or compressible. In this way it is possible to separate the spring from the product, regardless of a stroke movement of the pump or of the pump piston.

The proposed dispensing device preferably comprises a container, a dispensing head and such a pump. In this way, corresponding advantages are realized.

The above-mentioned aspects and features of the present invention as well as the aspects and features of the present invention resulting from the claims and the following description can basically be implemented independently of one another, but also in any desired combination.

Further aspects, advantages, features and characteristics of the present invention will become apparent from the claims and the following description of a preferred embodiment with reference to the drawing. It shows:

1 shows a schematic section of a proposed dispensing device with a proposed pump in a starting position.

FIG. 2 shows a schematic section of the pump according to FIG. 1 during the delivery of a product; FIG.

FIG. 3 shows a schematic section of the pump according to FIG. 1 in an end position; FIG. and

Fig. 4 is a schematic section of the pump of FIG. 1 during the suction of the product. In the partly not to scale, only schematic figures, the same reference numerals are used for the same, similar or similar components and components, with corresponding or comparable properties and advantages are achieved, even if it is omitted from a repeated description.

1 shows a schematic section of a proposed dispensing device 1 for dispensing a product or fluid 2. In the illustrated state, the dispensing device 1 is unactuated or the dispensing device 1 is in an initial or rest position.

The dispensing device 1 preferably comprises a container 3 with or for the product 2 and / or a dispensing head 4 for dispensing the product 2 to a user (not shown).

Preferably, the dispensing head 4 - in particular mechanically and / or fluidically - connected to the container 3 or connectable.

In the illustrated embodiment, the dispensing device 1 has a (separate) closure 5, preferably wherein the dispensing head 4 is positively, positively and / or materially connected, in particular by screwing, via the closure 5 with the container 3 or connectable. However, solutions are also possible in which the dispensing head 4 has or forms the closure 5 and / or the dispensing head 4 is directly or directly connected or connectable to the container 3.

Preferably, the container 3 is formed as a reservoir for the product 2. The dispensing device 1 or container 3 particularly preferably comprises a volume of more than 5 ml or 10 ml, in particular more than 50 ml or 100 ml, and / or less than 1000 ml or 800 ml, in particular less than 600 ml or 500 ml.

The container 3 is preferably elongated, cylindrical and / or rigid. Particularly preferably, the container 3 is made of metal, plastic or glass. In the illustrated embodiment, the dispenser 1 comprises an optional bag 6, preferably wherein the bag 6 is disposed inside the container 3 and / or contains the product 2. The optional bag 6 is preferably flexible or elastic. In particular, the bag 6 is compressible, preferably such that the volume of the bag 6 decreases (correspondingly) with the or each delivery of the product 2. Here, however, other solutions are possible.

The dispensing device 1 preferably has a pump 7, in particular of the type mentioned, on. Particularly preferably, the pump 7 as a positive displacement pump, in particular metering pump or reciprocating pump is formed. FIGS. 2 to 4 each show a schematic section of the pump 7 in different states or positions.

The pump 7 is preferably designed to pressurize and / or release under pressure the product 2, in particular a predefined volume of the product 2, from the container 3 or the bag 6.

Particularly preferably, the dispensing head 4 is connected fluidically to the container 3 via the pump 7 or can be connected. The pump 7 is preferably arranged at least partially in the interior of the container 3. In particular, the pump 7 extends from the dispensing head 4 into the container 3.

Preferably, the pump 7 is positively, positively and / or materially connected to the container ter 3 and / or dispensing head 4 or connectable.

In the illustrated embodiment, the pump 7 is attached via the closure 5 to the container 3 and the dispensing head 4 is placed on the pump 7. Here, however, other solutions are possible, for example, in which the pump 7 is integrated in the dispensing head 4 and / or the closure 5 has or forms.

The pump 7 preferably has a pump housing 8, a housing cover 9, an inlet 10, an outlet 11, an inlet valve 12, an outlet valve 13, a pump piston 14, a pump chamber 15 and / or a spring 16.

Preferably, the pump housing 8, the housing cover 9, the inlet 10, the outlet 11, the inlet valve 12, the outlet valve 13 and / or the pump are / are penkolben 14, more preferably all components or components of the pump 7 - made up of the spring 16 - made of plastic and / or injection molded.

The pump 7, in particular the pump housing 8, is preferably elongated and / or rotationally symmetrical. In particular, the pump 7 or the pump housing 8 has a longitudinal axis A, preferably wherein the longitudinal axis A is an axis of rotation of the pump 7 or of the pump housing 8.

The pump housing 8 is preferably designed as a particular elongated hollow cylinder.

Preferably, the pump 7 can be flowed through axially or along the longitudinal axis A and / or from the inlet 10 to the outlet 11. Preferably, the inlet 10 at a first, in the usual position of use of the dispenser 1 lower end of the pump 7 and the outlet 1 1 at a second, in the usual position of use of the dispenser 1 upper end of the pump 7 is arranged. Preferably, the inlet 10 and the outlet 1 1 form the axial ends of the pump 7, in particular wherein the inlet 10 to the container 3 and the outlet 1 1 associated with the dispensing head 4.

Preferably, the product 2 or a predefined volume of the product 2 can be supplied via the inlet 10 of the pump chamber 15 and / or fed from the pump chamber 15 via the outlet 1 1 the dispensing head 4.

The inlet valve 12 is preferably associated with the inlet 10 and / or disposed between the inlet 10 and the pump chamber 15. Preferably, the outlet valve 13 is associated with the outlet 1 1 and / or arranged between the outlet 1 1 and the pump chamber 15.

Preferably, the flow through the pump 7 by means of the inlet valve 12 and / or the outlet valve 13 is controllable.

Preferably, the inlet valve 12 is adapted to a flow of the product 2 from the container 3 into the pump chamber 15, in particular in dependence from the pressure in the pumping chamber 15, either to allow or to prevent.

The outlet valve 13 is preferably designed to selectively enable or prevent a flow of the product 2 from the pump chamber 15 to the outlet 11, in particular as a function of the pressure in the pump chamber 15, 15.

Particularly preferably, the inlet valve 12 and / or the outlet valve 13 (in each case) is designed as an automatically opening or automatically closing valve, preferably wherein the inlet valve 12 or the outlet valve 13 opens or closes depending on the pressure in the pump chamber 15.

Preferably, the pressure in the pump chamber 15 or the volume of the pump chamber 15 can be varied by actuating the dispensing device 1 or pump 7 or by a lifting movement of the pump piston 14.

Particularly preferably, the volume of the pump chamber 15 by pressing the dispenser 1 and a movement of the pump piston 14 down or in the direction of the container 3 is reduced and / or the pressure in the pump chamber 15 by operating the dispenser 1 and a movement of the pump piston 14 downwards or in the direction of the container 2 can be increased.

Particularly preferably, the outlet valve 13 opens (automatically) when a certain pressure in the pump chamber 15 is exceeded or a reduction of the pump chamber 15 by means of the pump piston 14 and / or closes the outlet valve 13 (automatically) when the pressure falls below a certain pressure in the pump chamber 15 or an enlargement of the pump chamber 15 by means of the pump piston 14.

Particularly preferably, the inlet valve 12 opens when falling below a certain pressure in the pump chamber 15 or an enlargement of the pump chamber 15 by means of the pump piston 14 and / or closes the inlet valve 12 (automatically) when exceeding a certain pressure in the pump chamber 15 or a reduction the pump chamber 15 by means of the pump piston 14th

The valves 12, 13 are consequently in dependence on the movement of the pump piston 14 - in particular automatically - obviously or closable, preferably where the outlet valve 13 and the inlet valve 12 are opposite to each other obviously or can be actuated by the movement of the pump piston 14.

Preferably, the inlet valve 12, outlet valve 13, the pump piston 14, the pump chamber 15 and the spring 16 are at least partially disposed in the pump housing 8 and encased by the pump housing 8.

Particularly preferably, the inner diameter of the pump housing 8 tapers to the container 3 or in the usual position of use of the dispensing device 1 down.

Preferably, the pump housing 8 has a first (axial) end 8A arranged at the bottom in the usual position of use of the dispensing device 1 and a second (axial) end 8B arranged at the top in the usual position of use of the dispensing device 1, preferably the first end 8A and the first end second end 8B each have an (axial) opening of the pump housing 8 or form.

In particular, the pump housing 8, preferably the first end 8A, has or forms the inlet 10 and / or the pump housing 8 tapers in the direction of the container 3 to the inlet 10.

Particularly preferably, the inner diameter of the inlet 10 and the first end 8A is smaller than the inner diameter of the second end 8B. In the illustrated embodiment, the inlet 10 is preferably formed as a connection or nipple for an optional riser 17. Here, however, other solutions are possible.

Preferably, the (inner) components of the pump 7, such as the spring 16 and the pump piston 14, are introduced or mounted in the pump housing 8 via the second end 8B.

Preferably, the housing cover 9 closes the pump housing 8, in particular the second end 8B, particularly preferably axially.

The housing cover 9 and the pump housing 8 are preferably connected to each other in a positive, force and / or material fit. In the illustrated embodiment Form the housing cover 9 on the pump housing 8, in particular the second end 8B, plugged or snapped and / or formed as a cap.

Preferably, the pump housing 8 at the second end 8B a preferably circumferential (radial) projection or flange 8C, preferably wherein the projection or flange 8C in the housing cover 9, in particular in a recess or flange 8C corresponding recess or Groove 9A of the housing cover 9, is engaged. The pump piston 14 is preferably elongated and / or preferably has a particular elongated piston shaft 14A and / or a - in particular compared to the piston shaft 14A enlarged - piston head 14B.

Preferably, the pump piston 14, in particular the piston shaft 14A, projects out of the pump housing 8 or the housing cover 9. Particularly preferably, the housing cover 9 has an (axial) opening 9B, preferably wherein the pump piston 14, in particular the piston shaft 14A, extends through the opening 9B of the housing cover 9 to the outside or to the dispensing head 4. Preferably, the pump piston 14, in particular the piston shaft 14 A, the outlet 1 1 or forms this. In particular, the pump piston 14 or piston shaft 14A has an (axial) outlet channel 14C, preferably wherein the outlet channel 14C opens into the outlet 11. As already explained, the dispensing head 4 is preferably connected to the pump 7 in a positive, positive and / or cohesive manner or can be connected. In the illustrated embodiment, the dispensing head 4 on the pump 7, in particular the pump piston 14 and the piston shaft 14 A, plugged. Here, however, other solutions are possible.

The pump piston 14 is preferably movable axially or along the longitudinal axis A, in particular in order to suck the product 2 out of the container 3 or to enlarge the pump chamber 15, to pressurize the sucked product 2 in the pump chamber 15 or to feed the pump chamber 15 zoom out and deliver over the outlet channel 14C and the outlet 1 1 in particular on or via the dispensing head 4. Preferably, the pump piston 14 is designed to perform a lifting movement in or relative to the pump housing 8. In particular, by actuating or depressing the dispensing head 4, the pump piston 14 is movable downwards or in the direction of the container 3 or inlet 10, in particular in order to reduce the size of the pump chamber 15 or to pressurize the product 2 in the pump chamber 15.

Preferably, the piston head 14 B has a larger diameter than the piston shaft 14 A and / or the pump piston 14 in the pump housing 8 side lent or radially over the piston head 14 B out.

Preferably, the pump piston 14 or the piston head 14 B has a particular circumferential guide surface 14 D, preferably wherein the guide surface 14 D is in contact with the inner surface 8 E of the pump housing 8 or is slidably movable over the inner surface 8 E of the pump housing 8.

Preferably, the pump piston 14 or the piston head 14 B has a particular peripheral seal 14 E, preferably wherein the seal 14 E is in contact with the inner surface 8 E of the pump housing 8, in particular such that the pump chamber 15 is sealed to the outside or axially or upwards ,

In the illustrated embodiment, the seal 14E is preferably formed integrally with the pump piston 14 and forms the pump piston 14, in particular the piston head 14B, the seal 14E. Here, however, other solutions are possible, in particular in which the seal 14E is formed as a piston ring and / or is embedded in a circumferential groove on the piston head 14B.

As already explained, the pump 7 preferably has at least one spring 16, in particular wherein the spring 16 is designed as a helical spring and / or is made of metal.

The spring 16 is preferably arranged completely in the pump housing 8. In particular, the spring 16 is arranged at least substantially centrally in the pump housing 8 and / or coaxially with the pump housing 8 and / or pump piston 14. However, solutions are also possible in which the spring 16 eccentrically in the pump housing 8 and / or radially offset from the longitudinal axis A of the pump housing 8 and the pump piston 14 is arranged. Preferably, the spring 16 is axially mounted in the pump housing 8, in particular at the first end 8A of the pump housing 8, as will be explained in more detail below.

Preferably, the spring 16 by pressing the dispensing head 4 and a movement of the pump piston 14 down or in the direction of the inlet 10 is compressible or compressible. The pump piston 14 is preferably biased by the spring 16 and / or against the spring force of the spring 16 downwardly or in the direction of the spring 16 movable, in particular to reduce the volume of the pump chamber 15 and the product 2 in the pump chamber 15 under pressure to set and / or from the pump chamber 15 via the outlet channel 14 C to the outlet 1 1 supply. The exact sequence of the pumping or lifting movement of the pump piston 14 will be explained in more detail below with reference to FIGS. 2 to 4.

An essential aspect of the present invention is to separate the spring 16 from the product 2 or to prevent the (immediate) contact between the spring 16 and the product 2, in particular independently of a pumping or lifting movement of the pump piston 14th

Preferably, the dispensing device 1 or the pump 7 (to) a - in particular removable - spring sleeve or -kapsei 18, preferably wherein the spring 16 is arranged in the spring sleeve or -kapsei 18 and / or wherein the spring sleeve or -kapsei 18 the spring 16 from the product 2 and the pump chamber 15 separates and / or surrounds or is arranged around the spring 16 (around).

In particular, the dispensing device 1 or the pump 7 has a preferably closed or sealed spring chamber 19, preferably wherein the spring 16 is arranged (completely) in the spring chamber 19 and / or the spring sleeve 18 has the spring chamber 19 forms or in particular radial and axial - limited. The spring sleeve 18 is preferably designed as a particular closed or sealed housing and / or at least substantially rigid. In particular, the spring sleeve 18 is made of plastic or injection-molded. The spring sleeve 18 and the spring chamber 19 is preferably elongate and / or cylindrical. Particularly preferably, the inner diameter of the spring sleeve 18 and the spring chamber 19 at least substantially corresponds to the outer diameter of the spring sixteenth

The spring sleeve 18 or the spring chamber 19 is preferably filled with a compressible medium, in particular gas, particularly preferably air.

The spring sleeve 18 or spring chamber 19 is preferably arranged centrally in the pump housing 8 and / or coaxially with the pump housing 8 or the pump piston 14.

Preferably, the pump chamber 15 extends around the spring sleeve 18 or the spring chamber 19, particularly in a ring-like manner, in particular such that the spring sleeve 18 or the spring chamber 19 can be flowed around.

In particular, the pump chamber 15 is bounded laterally or radially by the spring sleeve 18 and by the pump housing 8 and / or the spring sleeve 18 forms an inner wall and the pump housing 8 has an outer wall of the pump chamber 15.

The pump housing 8 preferably has a receptacle 8F for - in particular radial and / or axial - recording of the spring sleeve 18, preferably wherein the receptacle 8F between the inlet 10 and the inlet valve 12 on the one hand and the pump chamber 15 and the pump piston 14 on the other ,

Preferably, the pump chamber 15 tapers in the direction of the container 3 or down to the receptacle 8F or the pump chamber 15 has a larger diameter than the receptacle 8F.

Preferably, the inner diameter of the receptacle 8F corresponds at least substantially to the outer diameter of the spring sleeve 18 and the lower part of the spring sleeve 18, in particular such that the spring sleeve 18 is seated firmly or at least substantially free of play in the receptacle 8F of the pump housing 8. Preferably, the spring sleeve 18 protrudes from the receptacle 8F into the pump chamber 15 and / or the spring sleeve 18 extends from the receptacle 8F into the pump chamber 15. Preferably, the spring sleeve 18 - at least at the end or in the region of the receptacle 8F - several, in particular elongate or rib-like projections 18A, preferably wherein the projections 18A each extend parallel to the longitudinal axis A on the outside of the spring sleeve 18. Preferably, the spring sleeve 18 - in particular at the end or in the region of the receptacle 8F - a plurality of guide channels 18B, preferably wherein the guide channels 18B formed by the projections 18A and laterally bounded by the projections 18A. In particular, the guide channels 18B fluidly connect the pumping chamber 15 to the inlet 10 and inlet valve 12, respectively. In this way, the product 2 can flow from the inlet valve 12 into the pumping chamber 15. However, other constructive solutions are possible, in particular in which the pump housing 8 or the receptacle 8F has projections and / or depressions, in order to allow a flow of the product 2 from the inlet valve 12 to the pump chamber 15.

The pump housing 8, in particular the receptacle 8F, preferably has an (axial) bearing 8G for the spring sleeve 18, preferably wherein the bearing 8G is designed to axially support or support the spring sleeve 18, in particular such that the spring force of the Spring 16 is received or can be received by the pump housing 8 via the spring sleeve 18 and the bearing 8G. In the illustrated embodiment, the bearing 8G is preferably formed by a step or rib-like projections, in particular around the inlet valve 12. As already explained, the inlet valve 12 is preferably arranged between the pump chamber 15 and the inlet 10. Particularly preferably, the inlet valve 12 is arranged between the lower or the inlet 10 associated end of the spring sleeve 18 and the inlet 10. Preferably, the inlet valve 12 has a valve seat 12A and a valve body 12B, preferably wherein the valve body 12B is movable relative to the valve seat 12A, in particular to open or close the inlet valve 12. In the illustrated embodiment, the valve seat 12A is preferably formed by the pump housing 8, in particular by a step 8D of the pump housing 8. Preferably, the valve body 12B can be raised by the valve seat 12A, in particular when enlarging the pump chamber 15 or a pressure reduction in the pump chamber 15, in particular in such a way that the inlet valve 12 opens.

Preferably, the valve body 12B can be lowered onto the valve seat 12A, in particular with a reduction of the pump chamber 15 or an increase in pressure in the pump chamber 15, particularly preferably in such a way that the inlet valve 12 closes.

The spring sleeve 18 preferably has a limit or stop 18C or the spring sleeve 18 forms a limit or stop 18C for the inlet valve 12, in particular the valve body 12B.

The restriction 18C is preferably designed to limit or restrict the movement of the valve body 12B. Particularly preferably, the boundary 18C is formed by one or more-in particular axial-projections of the spring sleeve 18.

In the illustrated embodiment, the boundary 18C is crowned and / or the boundary 18C preferably has a plurality of axial prongs, preferably with the prongs facing toward the inlet valve 12 and valve body 12B, respectively. The prongs or projections reduce the boundary surface or bearing surface for the valve body 12B, so that the valve body 12B does not adhere to the boundary 18C.

Preferably, the valve body 12B of the inlet valve 12 is formed as a movable plate, preferably wherein the valve body 12B is raised or lowered depending on the pressure in the pump chamber 15. In particular, the inlet valve 12 opens by lifting the valve body 12B from the valve seat 12A towards the spring sleeve 18 and the limit 18C, in particular when the pressure in the pump chamber 15 decreases and / or the pump piston 14 moves upward. Other constructive solutions are also possible, for example in which the inlet valve 12 is designed as a diaphragm valve or the valve body 12B as a particularly flexible diaphragm, preferably wherein the spring sleeve 18, in particular the boundary 18C, preferably axially holds or clamps the valve body 12B and / or the inlet valve 12 by particular edge-side deformation or lifting of the valve body 12B is apparent.

The spring sleeve 18 is preferably designed in several parts and / or formed by a plurality of (separate) components or components.

Preferably, the spring sleeve 18 has a base part 20 and a head part 21, preferably wherein the base part 20 in the usual position of use of the dispensing device 1 below or in the receptacle 8F and the head part 21 conventional operating position of the dispensing device 1 is arranged above or in the pump chamber 15 ,

Preferably, the base part 20 forms a lower or the inlet 10 facing the end of the spring sleeve 18 and the head part 21 an upper or the outlet 1 1 facing end in the spring sleeve 18. In particular, close the base member 20 and the head part 2, the spring chamber 19 completely or both axially and radially.

The base part 20 is preferably designed to receive a first, in the usual position of use of the dispenser 1 lower end 16A of the spring 16 and the head part 21 for receiving a second, in the usual position of use of the dispensing device upper end 16B of the spring 16.

The spring sleeve 18 is preferably formed telescopically.

In particular, the spring sleeve 18 and the spring chamber 19 is compressible or compressible.

Preferably, the base part 20 and the head part 21 are movable or displaceable relative to one another, in particular in order to enlarge or reduce the spring chamber 19.

In particular, the base part 20 is immovably mounted relative to the pump housing 8 or fixed in the receptacle 8F and / or the head part 21 relative to the pump housing 8 and base member 20 and / or in the pump chamber 15 (axially) movable. Preferably, the spring sleeve 18 and / or the base part 20 and / or the head part 21 are at least substantially rigid. Here, however, other solutions are possible, in particular in which the spring sleeve 18 is formed elastically deformable. In particular, the spring sleeve 18 can be made of an elastic, compressible and / or foldable material to allow a lifting movement of the pump piston 14.

Preferably, the base part 20 and the head part 21 are inserted into one another and / or overlap the base part 20 and the head part 21, in particular in the region of the pump chamber 15. In the illustrated embodiment, the head part 21 is preferably placed on the base part 20 or extends Base part 20 in the head part 27. However, other solutions are possible, in particular in which the head part 21 is inserted into the base part 20.

Preferably, the spring sleeve 18, in particular the base part 20 and / or the head part 21, a guide or bearing pin 18 D, preferably wherein the pin 18 D extends axially into the spring chamber 19 and / or is adapted to the spring 16 and second end 16B of the spring 16 to hold or lead. In particular, the pin 18D is adapted to stabilize the spring 16 and / or to prevent buckling of the spring 16 upon compression of the spring 16 and the spring sleeve 18, respectively.

Preferably, the outer diameter of the head part 21 is smaller than the inner diameter of the pump chamber 15, in particular such that between the head part 21 and the pump housing 8, a (flow-through) gap is formed. However, other solutions are also possible, in particular in which the head part 21 and / or the pump housing 8 preferably have rib-like projections and / or elongated depressions, in order to allow a flow of the product 2 through the pump chamber 15 or from the inlet 10 to To allow outlet 1 1.

The head part 21 preferably has a particular circumferential seal or sealing lip 21 A for sealing the spring sleeve 18 and spring chamber 19. In particular, the seal 21 A is designed to seal the spring chamber 19 with respect to the pump chamber 15. Preferably, the seal 21A is radially on the base part 20, in particular such that by a pressure increase in the pump chamber 15, the seal 21 A (further) is pressed against the base member 20. In this way it is ensured that despite a pressure increase in the pump chamber 15, the spring chamber 19 is sealed.

The pump 7 preferably has a connecting element 22, preferably wherein the connecting element 22 connects the pump piston 14 (mechanically) with the spring 16 or the spring sleeve 18, in particular the head part 21.

The connecting element 22 is preferably elongate and / or preferably extends from the outlet valve 13 into the pumping chamber 15.

Preferably, the connecting element 22 and the pump piston 14 form the outlet valve 13, in particular wherein the pump piston 14, the valve seat 13 A and the connecting element 22, the valve body 13 B of the exhaust valve 13 or forms.

Particularly preferably, the connecting element 22 tapers upwards or in the direction of the dispensing head 4 to the valve body 13B and / or the connecting element 22 has a conical or conical end which has or forms the valve body 13B or a valve cone as the valve body 13B.

Preferably, the connecting element 22 and the spring sleeve 18, in particular the head part 21, fixed, preferably positively and / or non-positively connected to each other. In the illustrated embodiment, the connecting element 22 and the head part 21 are formed as separate components. Here, however, solutions are possible in which the head part 21 and the connecting element 22 are integrally formed or form a structural unit.

Preferably, the connecting element 22 is made of plastic or injection-molded.

Preferably, the connecting element 22 extends into the spring sleeve 18 or through the head part 21 into the spring chamber 19.

In the illustrated embodiment, the connecting element 22 on the pin 18 D and / or forms the connecting element 22, in particular a lower, the spring sleeve 18 associated end of the connecting element 22, the pin 18D. However, solutions are also possible here in which the head part 21 has or forms the pin 18D. Preferably, the connecting element 22 - in particular after exceeding a predetermined pressure in the pump chamber 15 or by actuating the dispenser 1 and the dispensing head 4 - relative to the pump piston 14 and in the usual position of use of the dispenser 1 downwardly movable, preferably to the outlet valve 13 open or lift the valve body 13 B from the valve seat 13 A and / or the product 2 from the pump chamber 15 to the outlet 1 1 supply.

Particularly preferably, the connecting element 22 and the head part 21 are movable together against the spring force of the spring 16 to open the outlet valve 13 and to allow a discharge of the product 2 from the pump chamber 14.

In the following, the sequence of movements of the dispensing device 1 and the pump 7 will be explained in more detail.

Fig. 1 shows the dispensing device 1 and the pump 7 in the unactuated state or in a starting position. 2 shows the pump 7 during the actuation or during the delivery of the product 2. FIG. 3 shows the pump 7 in an end position in which the pump piston 14 or the connecting element 22 is completely downwards or in the direction of the Inlet 10 is moved. FIG. 4 shows the pump 7 during the return of the pump piston 14 to the starting position or during the suction or filling of the pump chamber 5 with the product 2.

The starting or rest position of the dispensing device 1 or the pump 7 is preferably that position which the pump 7, in particular the pump piston 14 or the head part 21 or the connecting element 22, in the unactuated state and / or automatically or by the Spring force of the spring 16 occupies. In the initial position, the volume of the pump chamber 15 is maximum and / or the spring 16 presses the pump piston 14, the head part 21 and / or the connecting element 22 upwards or against the pump housing 8 or the housing cover 9. Preferably, the starting position or a movement of the pump piston 14 beyond the starting position is limited by the stop of the pump piston 14, in particular of the piston head 14B, against the pump housing 8 or the housing cover 9 (axially or upwardly).

The end position is preferably that position which occupies the pump 7, in particular the pump piston 14 or the head part 21 or the connecting element 22, upon complete actuation of the pump 7. In particular, in the end position the pump piston 14 or the head part 21 or the connecting element 22 is moved or pressed down completely in the direction of the inlet 10. In the end position, the volume of the pump chamber 15 is minimal and / or smaller than in the starting position.

The end position or a movement of the pump piston 14 beyond the end position is preferably limited by the stop of the connecting element 22 or the head part 21 against the base part 20 and / or the pump housing 8 (axially or downwardly).

Preferably, the pump 7 is transferable by (manually) depressing the dispensing head 4 from the home position as shown in FIG. 1 to the final position as shown in FIG.

Preferably, the spring 16 is designed to transfer the pump 7, in particular by means of spring force or automatically, from the end position to the starting position. In particular, by the spring 16, an automatic reset of the pump 7 and the pump piston 14 after the operation of the pump 7 in the starting position.

The pump piston 14 or the connecting element 22 or the head part 21 are or is preferably biased in the starting position by means of the spring 16. In particular, the spring 16 presses the head part 21 or the connecting element 22 or the pump piston 14 against the pump housing 8 or the housing cover 9. By actuating the dispensing device 1 or the dispensing head 4, the pump piston 14, in particular together with the head part 21 or ., the connecting element 22, against the spring force of the spring 16 and in the usual position of use downwards or in the direction of the container 3 movable, preferably whereby the volume of the pump chamber 15 is reduced and / or the pressure in the pump chamber 15 is increased, as already explained.

By reducing the volume of the pump chamber 15 or by the pressure increase in the pump chamber 15, the inlet valve 12 is closed (automatically) and / or the valve body 12 B pressed against the valve seat 12 A, in particular such that the product 2 in the pump chamber 15 is not back can flow into the container 3. When the dispensing device 1 or the dispensing head 4 or the pump 7 is actuated, the head part 21 is preferably moved relative to the base part 20 and / or the spring chamber 19 is reduced and / or the gas pressure in the spring chamber 19 is increased. Preferably, the spring sleeve 16 and the spring chamber 19 is designed such that no gas or no air from the spring chamber 19 - escapes into the pump chamber 15 - even with or despite an increase in pressure by compression of the spring chamber 19. As already explained, the outlet valve 13 is designed to open automatically when a predetermined pressure in the pump chamber 15 is exceeded. In particular, an increase in pressure in the pump chamber 15 or an actuation of the dispensing device 1 or of the dispensing head 4 or of the pump 7 causes the valve body 13B or the connecting element 22 to move relative to the valve seat 13A or the pump piston 14 from the valve seat 13A or pump piston 14, preferably in such a way that the outlet valve 13 opens and / or the product 2 can flow from the pump chamber 15 through the outlet valve 13 into the outlet channel 14C of the pump piston 14, as shown in FIG indicated.

The opening of the outlet valve 13 causes a pressure drop in the pump chamber 15, preferably such that the outlet valve 13 would close again without further actuation of the dispensing device 1. By a continuous actuation of the dispensing device 1 or the dispensing head 4 or the pump 7, however, the volume of the pump chamber 15 is further reduced or the product 2 is pressurized in the pump chamber 15, preferably in such a way that the outlet valve 13 remains open for so long until the end position as shown in FIG. 3 is reached. After or when the end position is reached, the dispensing process is completed and / or closes the outlet valve 13, in particular the fact that the pump housing 8 and / or the base member 20, the valve body 13 B or the connecting element 22 and the head part 21 against the valve seat 13A and the pump piston 14 presses.

In the illustrated embodiment, as illustrated in particular in FIG. 3, the movement of the pump piston 14 or of the head part 21 or of the connecting element 22 downwards is limited by the fact that the head part 21 abuts against the axial end of the base part 20. However, other solutions are also possible here, in particular in which the pump housing 8 has or forms a stop for the head part 21, the connecting element 22 and / or the pump piston 14.

After delivery of the product 2 or by releasing the dispensing head 4, a self-filling of the pump chamber 15 is preferably carried out.

As soon as the dispensing head 4 is released, the spring 16 again presses the pump piston 14 or the head part 21 or the connecting element 22 upwards or in the direction of the dispensing head 4 or into the starting position.

By the provision of the pump 7, in particular of the pump piston 14 and the head part 21 and the connecting element 22, from the end position to the starting position, the volume of the pump chamber 15 is increased and / or the pressure reduced by the increase in volume of the pump chamber 15, preferably whereby the inlet valve 12 opens or the valve body 12 B is lifted from the valve seat 12 A, as shown in Fig. 4. By the movement of the pump piston 14 from the end position to the starting position or in the usual position of use of the dispensing device 1 up a predefined volume of the product 2 from the container 3 via the optional riser 17 and the inlet 10 and / or the inlet valve 12 in the pump chamber 15 is sucked or conveyed.

Together with the movement of the pump piston 14 to the starting position, the volume of the spring chamber 19 and / or the head part 21 moves relative to the base part 20 or upwards. As indicated by arrows in Fig. 4, the product 2 flows during the return of the pump piston 14 to the starting position by the inlet valve 12 laterally past the spring sleeve 18 into the pump chamber 15, in particular without in (direct) contact with the spring 16 come.

Due to the fact that the spring 16 presses the head part 21 or the connecting element 22 against the pump piston 14, the outlet valve 13 is or remains closed during the (entire) movement of the pump piston 14 upwards or into the starting position.

Once the starting position is reached, the filling of the pump chamber 15 is completed. By renewed actuation of the dispensing device 1 or of the dispensing head 4, the product 2 located in the pump chamber 15 can then be dispensed, as already explained.

The proposed dispensing device 1 or pump 7 makes it possible for the spring 16 -particularly independently of a pumping or lifting movement of the pump 7-to be separated from the product 2 and / or the spring chamber 19 -particularly independent of a pumping or pumping device. Lifting movement of the pump 7 - is sealed.

Consequently, the direct contact between the spring 16 and the product 2 and (thus) a possible reaction of the material of the spring 16 with the product 2 is avoided. In particular, rust formation in the pump 7 and (thus) possible contamination of the product 2 is prevented or at least reduced.

Individual aspects and features of the present invention can be implemented independently of one another, but also in any desired combination and / or order. LIST OF REFERENCE NUMBERS

1 Dispensing device 35 14 Pump piston

2 product / fluid 14A piston stem

3 container 14B piston head

4 dispensing head 14C outlet channel

5 closure 14D guide surface

6 bags 40 14E seal

7 pump

15 pump chamber

8 pump housing

16 spring

8A first end

45 16A first end

8B second end

16B second end

8C lead

8D step 17 riser

8E inner surface 50 18 spring sleeve

8F recording 18A projection

8G bearing 18B guide channel

9 Housing cover 18C limitation

9A groove 18D tenon

55

9B opening 19 spring chamber

10 inlet 20 base part

1 1 outlet 21 headboard

12 inlet valve 60 21A seal

12A valve seat 22 connecting elements

12B valve body

13 exhaust valve

3A valve seat 65 A longitudinal axis

13B valve body

Claims

claims:

1 . Pump (7) for a preferably liquid product (2),

wherein the pump (7) comprises a pump housing (8), a pump piston (14), a pump chamber (15), a spring (16), an inlet (10), an outlet (1 1), an inlet valve (12) and a Having outlet valve (13),

wherein the pump piston (14), the pump chamber (15), the spring (16), the inlet valve (12) and the outlet valve (13) are at least partially arranged in the pump housing (8),

wherein the pump piston (14) in the pump housing (8) is axially movable to promote the product (2) via the inlet (10) in the pump chamber (15) and from the pump chamber (15) to the outlet (1 1) .

wherein the pump piston (14) is biased by the spring (16) to an initial position and movable against the spring force of the spring (16) to an end position to pressurize the product (2) in the pump chamber (15),

characterized,

the pump (7) has a spring sleeve (18) around the spring (16), the spring sleeve (18) separating the spring (16) from the product (2), and / or

in that the pump (7) has a sealed spring chamber (19) for the spring (16), wherein the spring (16) is arranged in the spring chamber (19).

2. Pump according to claim 1, characterized in that the Pumpenkam- mer (15) laterally from the spring sleeve (18) and the pump housing (8) is limited.

3. Pump according to claim 1 or 2, characterized in that the spring sleeve (18) seals the spring chamber (19) or laterally limited.

4. Pump according to one of the preceding claims, characterized in that the spring sleeve (18), the spring (16) in particular completely encased.

5. Pump according to one of the preceding claims, characterized in that the pump chamber (15) - in particular ring-like - to the spring sleeve (18) or the spring chamber (19) extends around, so that the spring sleeve (18) from the product (2) can flow around.

6. Pump according to one of the preceding claims, characterized in that the spring sleeve (18) separates the spring (16) regardless of a pumping movement of the product (2).

7. Pump according to one of the preceding claims, characterized in that the spring chamber (19) is sealed independently of a pumping movement.

8. Pump according to one of the preceding claims, characterized in that the spring sleeve (18) is formed in several parts and / or telescopic or compressible.

9. Pump according to one of the preceding claims, characterized in that the spring chamber (19) is compressible or compressible.

10. Pump according to one of the preceding claims, characterized in that the pump (7) has a connecting element (22) which connects the pump piston (14) with the spring sleeve (18) or the spring (16) mechanically.

1 1. Pump according to claim 10, characterized in that the connecting element (22) and the pump piston (14) form the outlet valve (13) and / or the connecting element (22) - in particular after exceeding a predetermined pressure in the pump chamber (15). relative to the pump piston (14) is movable, preferably to open the outlet valve (13) and / or deliver the product (2) via the outlet (1 1).

12. Pump according to one of the preceding claims, characterized in that the spring sleeve (18) has a base part (20) and a head part (21).

13. A pump according to claims 10 and 12, characterized in that the head part (21) and the connecting element (22) are integrally formed or form a structural unit and / or fixed, preferably form-fitting, are interconnected and / or together by means the spring (16) biased into the starting position or against the spring force of the spring (16) are movable.

14. A pump according to claim 12 or 13, characterized in that the base part (20) and the head part (21) are relatively or telescopically movable relative to each other and / or the head part (21) sealed to the base part (20) is connected.

15. Pump according to one of the preceding claims, characterized in that the inlet valve (12) between the inlet (10) and the pump chamber (15) is arranged.,

16. A pump according to claim 15, characterized in that the inlet valve (12) at an enlargement of the pump chamber (15) or a movement of the

Pump piston (14) opens automatically from the end position to the starting position.

17. Dispensing device (1) for dispensing a preferably liquid product (2), wherein the dispensing device (1) has a dispensing head (4), a pump (7) and a

Container (3) with or for the product (2),

wherein the dispensing head (4) is fluidically connected to the container (3) via the pump (7),

characterized,

the pump (7) is designed according to one of the preceding claims.