EP2785466B1 - Pumpvorrichtung für einen flüssigkeitsbehälter - Google Patents

Pumpvorrichtung für einen flüssigkeitsbehälter Download PDF

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Publication number
EP2785466B1
EP2785466B1 EP12743531.1A EP12743531A EP2785466B1 EP 2785466 B1 EP2785466 B1 EP 2785466B1 EP 12743531 A EP12743531 A EP 12743531A EP 2785466 B1 EP2785466 B1 EP 2785466B1
Authority
EP
European Patent Office
Prior art keywords
actuator
pumping device
outlet valve
chamber
folded membrane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP12743531.1A
Other languages
English (en)
French (fr)
Other versions
EP2785466A2 (de
Inventor
Johannes Hubertus Jozef Maria Kelders
Roy Van Swieten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AIROPACK TECHNOLOGY GROUP AG
Original Assignee
Airopack Tech Group AG
Airopack Technology Group AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Airopack Tech Group AG, Airopack Technology Group AG filed Critical Airopack Tech Group AG
Priority claimed from PCT/IB2012/052909 external-priority patent/WO2012168916A2/en
Publication of EP2785466A2 publication Critical patent/EP2785466A2/de
Application granted granted Critical
Publication of EP2785466B1 publication Critical patent/EP2785466B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
    • F04B23/028—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir the pump being mounted on top of the reservoir
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B05B11/028—Pistons separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1028—Pumps having a pumping chamber with a deformable wall
    • B05B11/1033—Pumps having a pumping chamber with a deformable wall the deformable wall, the inlet and outlet valve elements being integrally formed, e.g. moulded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1076—Traction springs, e.g. stretchable sleeve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1097—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle with means for sucking back the liquid or other fluent material in the nozzle after a dispensing stroke

Definitions

  • the invention is related to a pumping device for a fluid container according to the preamble of claim1 or claim 6.
  • Pumping devices for fluid containers are in general provided with an actuator and a head part connected to the fluid container. Between the actuator and the head part a coil spring is provided in order to repel the actuator from the head part. As the actuator is pushed downwards, an outlet valve in the actuator is opened and fluid is dispensed through an orifice or a spray nozzle. When the actuator is released it will return to its starting position and simultaneously an inlet valve at the head part will be opened and fluid in the container will be sucked into the pump chamber between the actuator and the head part.
  • US 6,227,414B1 describes for instance a dispensing device for liquid with a support in an opening of a receptacle which encloses the product to be dispensed.
  • the support has a central tubular conduit, a pushbutton axially slidably mounted on the support between a rest position and an active position and a product outlet conduit.
  • An intermediate piece of a resiliently deformable material is provided between the support and the pushbutton.
  • the intermediate piece and the pushbutton define a measured quantity chamber for the product.
  • the intermediate piece has an opening for communication between the tubular conduit of the support and the measured quantity chamber, and sealingly bears against at least one opening for passage between the measured quantity chamber and the outlet conduit of the pushbutton.
  • a drawback of this known dispensing device is that the outlet conduit is ending in the upper cap of the pushbutton and therefore not very practicable. In addition since there are two parallel walls in the intermediate piece which have to be stretched if the pushbutton is actuated the resilient resistance is quite high. Another drawback is that the dispensing device might drip after dispensing the product.
  • a dispenser for dispensing fluid or pasty products with a supply chamber, a head piece, a pump chamber, an inlet valve and an outlet valve, wherein the pump chamber is made as an integral body from a resilient plastic material.
  • the pump chamber body comprises a bottom connection part which is formed as a ring collar.
  • the outlet valve exists of a separate flat piece which is cooperating with the pump chamber body. If the head piece is actuated the pump chamber body is pressed down so that it is bulged. Therefore the volume of the pump chamber is only marginally reduced by the pump chamber body and the pump action is less efficient as with a piston cylinder embodiment.
  • US-A-2008/010934 describes a fluid dispenser comprising a body, a pusher axially displaceable between a rest position and a depressed position, and a flexible part connecting the body to the pusher.
  • the body, the pusher and the flexible part together form pump chamber.
  • the flexible part forms return spring means urging the pusher towards the rest position.
  • the flexible part also forms the moving member of an outlet valve.
  • the part also comprises support means engaged with the body, and anchor means engaged with the pusher.
  • the support means are surrounded by the anchor means.
  • the flexible part further includes an elastically deformable portion that extends between the support means and the anchor means. The elastically deformable portion constitutes both the return spring means and the outlet valve moving member (see Fig. 1 ).
  • valve moving member and the seat rim form the outlet valve.
  • the space between the outlet valve and the outlet conduit which is upstream of the outlet valve is invariable.
  • the stroke of the 2 is very small, so that several pumping actions are necessary to spend a larger volume of fluid from the container. Moreover, dripping of the outlet conduit cannot be prevented.
  • DE-U-87 13 891 describes a manual pump with a push button, a push button guide, an inlet valve supporting wall and a screw-shaped bellow which is connected on one side by a connecting sleeve to the push button and on the other side by a connecting sleeve to the inlet valve supporting wall.
  • an inlet valve is provided and at the upper end of the bellow and outlet valve.
  • the inlet valve and the outlet valve consist of a valve seat and a valve seat closing element.
  • the valve seat closing element of the outlet valve is hollow cylindrical and is form-closed on the hollow cylindrical valve seat.
  • the inlet valve is formed by a sheet which is connected to the bellow by a resilient bridge.
  • Outlet valve is arranged at a fixed position relative to the push button, so that the space upstream of the outlet valve towards the outlet spout is invariable.
  • US-A-2010/0116849 describes a device for dispensing a liquid to pasty product which is placed at the open end of a rigid container and includes a manual dosing pump.
  • the device has a base member to be placed on the container, a push button with a dispensing spout capable of a pumping action against a bellows including an opening-closing system formed at the upper end of the bellows.
  • the opening-closing system includes a first inner peripheral collar formed at the upper end of the bellows and associated with a second collar of the bellows that is concentrically arranged relative to the first one and inserted in the same groove of the push button, wherein a locking tab capable of blocking the opening protrudes from the collar.
  • the first internal peripheral collar forms a convex geometry with respect to the internal wall of the groove, then a concave geometry before the product passes between the collar and the internal wall before emerging through the spout, and then becomes convex again when the positive pressure in the bellows ceases.
  • the outlet valve is arranged at a fixed position relative to the actuator such that sucking back of the product after spending is very restricted.
  • the dispensing device has a quite complicated construction.
  • US-A-5,267,673 describes a closing device for containers comprising a unit with an inner part made of a flexible elastic material, placed in a cap made of a rigid material.
  • the unit either fits onto a container having an assembling part whose shape is adapted to receive the unit, or the unit can be integral with the container.
  • Elasticity of the inner part, and it form which is associated with the form of the cap, produces and discharges a dose when pressure is exerted on the cap, without allowing air from outside the container to come in contact with the contents of the container.
  • This dosing device has the drawback that the outlet may be become dirty by liquid or pasty products which remain in the outlet or will drip after spending.
  • the pumping device of the present invention has the large advantage that merely less different parts are necessary, whereas the pumping mechanism is very reliable. Also the irksome dripping of know pumping devices is prevented by the suck-back chamber of the present pumping device.
  • the spring function is provided by the membrane part and simultaneously the inlet and outlet valves are integrated by the membrane part.
  • a pumping device 1 is depicted which is screwed on top of a container 2 which has a piston 3 for expelling fluid out of the container 2.
  • the pumping device 1 has an actuator 4 and a head part 5.
  • the head part 5 has a bottom 7 with an outer ring cylinder 8 on top and bottom ring cylinder 9 with an inner screw thread 10 for connecting the head part 5 to the container 2.
  • a fluid chamber 11 is formed in the container 2.
  • the actuator 4 has an outer cylindrical cover 12 with a flat top 13 and is provided at its open end 14 with a ring-shaped outer bulge 15, which cooperates with an inner bulge 16 at the outer ring 8 of the head part 5, so that the actuator 4 is slideably received in the head part 5.
  • the actuator 4 has further at the inside a first cylindrical member 18 with a lower open end 19.
  • a second cylindrical member 20 with an upper open end 21 is mounted on top of the head part 5.
  • the diameter of the first cylindrical member 18 is smaller than the diameter of the second cylindrical member 20, i.e. the first cylindrical member 18 is circumvented by the second cylindrical member 20.
  • a membrane member 22 with a lower inlet valve 24 and an upper outlet valve 25 is provided, such that a pump chamber 27 is formed.
  • a small cone 28 is provided with an opening 29 towards the container 2.
  • the inlet valve 24 provided by a conical lip of the membrane member 22 is resting on the cone 28 and thus closing the opening 29.
  • the outlet valve 25 provided also by a conical lip is resting towards the outer wall of the first cylindrical member 18, so that the outlet valve 25 is also closed.
  • a closed tube 30 can be provided on the small cone 28 for reducing the volume of the pump chamber 27.
  • this closed tube 30 is not necessary for the function of the present pumping device 1. For instance in the embodiment of Figures 2a to 2e (see below) there is no closed tube 30, but only the small cone 28 with one or more openings 29.
  • the actuator 4 has further a third cylindrical member 31 with a lower ring-shaped open end 32 which has a slightly larger diameter than the second cylindrical member 20 and thus providing a clearance 33 between the cylindrical members 20 and 31.
  • the membrane member 22 is folded at the upper edge 34 and has a resilient part 35 which is sealing the clearance 33 and is ending in a lock seam 36, which is gripping the open end 32.
  • the resilient part 35 of the membrane member 22 is formed by a reduced thickness so that the membrane member 22 can be stretched as the actuator 4 is pushed down.
  • the third cylindrical member 31 is ending at the upper side of the actuator 4 into a spout or outlet conduit 37.
  • a chamber 38 which serves as so called suck-back chamber which is preventing dripping of the pumping device 1 after fluid has been dispensed or pressed out.
  • the pumping device 1 connected to the container 2 may be closed by a cap 40.
  • an air chamber 42 is provided in the container 2 below the piston 2.
  • a small hole or clearance (not shown) is provided in the lower part of the container 2 under the piston in its lowest position.
  • the first and third cylindrical members 18 and 31 and the outlet conduit 37 are integrally formed with the actuator 4. Also the outer ring cylinder 8, the second cylindrical member 20 and the closed tube 30 are integrally formed with the head part 5.
  • the membrane member 22 with the inlet valve 24, the outlet valve 25, the resilient part 35 and the lock seam 36 are made in one piece made of a suitable soft plastic material like a thermoplastic elastomer as polyethylene (PE).
  • the pumping device 1 and the container 2 are manufactured from a suitable hard plastic material like polypropylene (PP) or polycarbonate (PC).
  • PP polypropylene
  • PC polycarbonate
  • the pumping device 1 with the membrane member 22 can be advantageously manufactured by a two-component blow molding process so that the different parts are readily assembled and no further assembling steps are needed.
  • FIG. 3 a cross-section of a second embodiment 50 of the pumping device according to the present invention is depicted.
  • the pumping device 50 has a head part 51, which been mounted to a container 52 by a snap-on connection, and an actuator 53 which is slideably mounted in the head part 51.
  • the actuator 53 has a first cylindrical member 55 with a lower open end 56 and a spout of outlet conduit 57.
  • the top part 58 of the actuator 53 is curved towards the spout 57.
  • the head part 51 has a second cylindrical member 59 with a larger diameter than the first cylindrical member 55 and in between both members 55 and 59 a membrane member 61 is provided.
  • the membrane member 61 has a lower inlet valve 62 and an upper outlet valve 63, both made of conical lips integrally formed to the membrane member 61.
  • the head part 51 has further a central small cone 64 which has several openings 65 which are closed by the inlet valve 62 in rest position of the pumping device 50.
  • On the small cone 63 a pin 66 is provided which bears the conical lip of the outlet valve 63.
  • the membrane member 61 has further a resilient part 68 which is provided by corrugations so that the actuator 53 is urged in the upper position in which the actuator 53 and the head part 51 are restricted by the bulges 70 and 71 as in the first embodiment.
  • the membrane member 61 has a ring-shaped lock seam 72 surrounding the outlet valve 63 which is gripping the open end of the first cylindrical member 55.
  • the membrane member 61 as such forms a pump chamber 74 which can be reduced by pushing the actuator 53 by which action the first cylindrical member 55 is pushed against the lock seam 72 and pushes down the outlet valve 63 over the pin 66.
  • the chamber 75 within the first cylindrical member 55 above the outlet valve 63 is here also a suck-back chamber which is reduced simultaneously with pump chamber 74 by the pushing action of the actuator 53.
  • the container 52 forms a fluid chamber 76 which is arranged above a - here not shown - piston as in the first embodiment of Fig. 1 .
  • FIG 4 the membrane member 61 is shown in cross-section.
  • a lower part 77 has a frusto-conical shape and an upper part 78 has a flat shape with the corrugations 68 of the resilient part.
  • the lower part 77 and the upper part 78 are connected by a bridge 79 of smaller thickness, so that the upper part 78 can be folded onto the lower part 77.
  • Two small cams 80 are provided on both sides of the corrugations 68 so that the upper part 78 can be properly aligned to the lower part 77.
  • the function of the second embodiment of the pumping device 50 is similar as described with respect to Figures 2a to 2e .
  • the same plastic materials and the same production process are used as for the first embodiment 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Claims (10)

  1. Pumpvorrichtung (1) zum Abgeben eines Fluids aus einem Behälter (2), der eine Fluidkammer (11) und einen Kolben (3) zum Verkleinern des Volumens der Fluidkammer umfasst, umfassend eine Betätigungsvorrichtung (4) und einen Kopfteil (5), der mit dem Behälter verbindbar ist, wobei die Betätigungsvorrichtung (4) eine Auslassleitung (37) und ein erstes zylindrisches Element (18) umfasst und der Kopfteil (5) ein zweites zylindrisches Element (20) umfasst, das koaxial mit dem ersten zylindrischen Element angeordnet ist, ferner umfassend ein gefaltetes Membranelement (22), das zwischen dem ersten und dem zweiten zylindrischen Element vorgesehen ist, wobei das gefaltete Membranelement (22) ein Einlassventil (24) und ein Auslassventil (25) aufweist, so dass das erste und zweite zylindrische Element und das gefaltete Membranelement eine veränderliche Pumpkammer (27) bereitstellen, dadurch gekennzeichnet, dass das Auslassventil relativ zur Betätigungsvorrichtung (4) vorgesehen ist und das Einlassventil (24) und das Auslassventil (25) in einer vorbestimmten unveränderlichen Entfernung zueinander angeordnet sind, derart, dass eine Rücksaugkammer (38) mit einem veränderlichen Volumen zwischen dem Auslassventil (25) und der Auslassleitung (37) vorgesehen ist, wobei das veränderliche Volumen gleichzeitig damit verkleinert und vergrößert wird, dass das Volumen der Pumpkammer (27) durch die Pumpwirkung verkleinert und vergrößert wird.
  2. Pumpvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das gefaltete Membranelement (22) einen mit der Betätigungsvorrichtung (4) und dem Kopfteil (5) verbundenen elastischen Teil (35) umfasst, der die Betätigungsvorrichtung in eine Ruheposition relativ zum Kopfteil zwingt.
  3. Pumpvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Einlassventil (24) und das Auslassventil (25) als konisch zulaufende Lippen ausgebildet sind.
  4. Pumpvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Betätigungsvorrichtung (4) ein drittes zylindrisches Element (31) umfasst, das das zweite zylindrische Element (20) des Kopfteils (5) koaxial umgibt, um die Rücksaugkammer (38) zwischen dem Auslassventil (25) und der Auslassleitung (37) zu bilden.
  5. Pumpvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass das gefaltete Membranelement (22) an seinem offenen Ende einen Verriegelungsfalz (36) aufweist, der das offene Ende (32) des dritten zylindrischen Elements (31) ergreift.
  6. Pumpvorrichtung (50) zum Abgeben eines Fluids aus einem Behälter (52), der eine Fluidkammer (76) und einen Kolben (3) zum Verkleinern des Volumens der Fluidkammer umfasst, umfassend eine Betätigungsvorrichtung (53) und einen Kopfteil (51), der mit dem Behälter verbindbar ist, wobei die Betätigungsvorrichtung (53) eine Auslassleitung (57) und ein erstes zylindrisches Element (55) umfasst und der Kopfteil (51) ein zweites zylindrisches Element (59) umfasst, das koaxial mit dem ersten zylindrischen Element angeordnet ist, ferner umfassend ein gefaltetes Membranelement (61), das zwischen dem ersten und dem zweiten zylindrischen Element vorgesehen ist, wobei das gefaltete Membranelement (61) ein Einlassventil (62) und ein Auslassventil (63) aufweist, so dass das erste und zweite zylindrische Element und das gefaltete Membranelement eine veränderliche Pumpkammer (74) bereitstellen, dadurch gekennzeichnet, dass das Auslassventil (63) relativ zur Betätigungsvorrichtung (53) vorgesehen ist und das gefaltete Membranelement (61) die Pumpkammer (74) bildet und das Auslassventil (63) des gefalteten Membranelements fest an dem ersten zylindrischen Element (55) der Betätigungsvorrichtung (53) angebracht ist und das gefaltete Membranelement (61) einen in Richtung auf das Einlassventil (62) weisenden konischen unteren Teil (77) und einen in Richtung auf das Auslassventil (63) weisenden geschlossenen oberen Teil (78) aufweist, wobei der geschlossene obere Teil (78) einen federnden Teil (68) umfasst, um die Betätigungsvorrichtung in eine Ruheposition zu zwingen, derart, dass eine Rücksaugkammer (75) mit einem veränderlichen Volumen zwischen dem Auslassventil (63) und der Auslassleitung (57) vorgesehen ist, wobei das veränderliche Volumen gleichzeitig damit verkleinert und vergrößert wird, dass das Volumen der Pumpkammer (74) durch die Pumpwirkung verkleinert und vergrößert wird.
  7. Pumpvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass der elastische Teil (68) eine gewellte Form aufweist.
  8. Pumpvorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Betätigungsvorrichtung (4; 53) und der Kopfteil (5; 51) aus einem harten Kunststoffmaterial hergestellt sind.
  9. Pumpvorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das gefaltete Membranelement (22; 61) aus einem elastomeren Kunststoffmaterial hergestellt ist.
  10. Pumpvorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass das Material ein thermoplastisches Elastomer ist.
EP12743531.1A 2011-06-09 2012-06-08 Pumpvorrichtung für einen flüssigkeitsbehälter Not-in-force EP2785466B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH9752011 2011-06-09
PCT/IB2012/052909 WO2012168916A2 (en) 2011-06-09 2012-06-08 Pumping device for a fluid container

Publications (2)

Publication Number Publication Date
EP2785466A2 EP2785466A2 (de) 2014-10-08
EP2785466B1 true EP2785466B1 (de) 2017-08-02

Family

ID=51429430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12743531.1A Not-in-force EP2785466B1 (de) 2011-06-09 2012-06-08 Pumpvorrichtung für einen flüssigkeitsbehälter

Country Status (2)

Country Link
EP (1) EP2785466B1 (de)
ES (1) ES2644127T3 (de)

Also Published As

Publication number Publication date
ES2644127T3 (es) 2017-11-27
EP2785466A2 (de) 2014-10-08

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