EP1991362B1 - Pumpe zur manuellen abgabe eines in einem behälter enthaltenen fluiden stoffes - Google Patents

Pumpe zur manuellen abgabe eines in einem behälter enthaltenen fluiden stoffes Download PDF

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Publication number
EP1991362B1
EP1991362B1 EP06830528A EP06830528A EP1991362B1 EP 1991362 B1 EP1991362 B1 EP 1991362B1 EP 06830528 A EP06830528 A EP 06830528A EP 06830528 A EP06830528 A EP 06830528A EP 1991362 B1 EP1991362 B1 EP 1991362B1
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EP
European Patent Office
Prior art keywords
pump
stem
cup
lip
shaped body
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Application number
EP06830528A
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English (en)
French (fr)
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EP1991362A1 (de
Inventor
Matteo Moretti
Gabriele Rampini
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Lumson SpA
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Lumson SpA
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Publication of EP1991362A1 publication Critical patent/EP1991362A1/de
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Classifications

    • 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
    • B05B11/1001—Piston pumps
    • B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
    • B05B11/1025—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem a spring urging the outlet valve in its closed position
    • 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
    • B05B11/1061—Pump priming means

Definitions

  • the present invention relates to an improved manually operable pump for dispensing quantities of a fluid substance in the form of liquids, creamy substances or the like through the hollow operating stem of the pump.
  • the pump enables the substance to be dispensed while preventing, in any position and under normal conditions of use, the passage of fluids (air, gas or liquid) between the outer surface of the stem and the adjacent surface of the hole in the pump ring cap through which said stem extends and is translatable.
  • a passageway or aperture must be provided in the pump to enable atmospheric air to penetrate into the container in order to maintain the pressure substantially constant at atmospheric pressure therein.
  • air passes through a passageway provided in the pump body or between the pump and the ring cap on which the pump is mounted, the air always passing between the outer surface of the hollow stem and the opposing surface of the hole provided in the pump ring cap through which the stem passes.
  • the passageway existing between the outer surface of the pump hollow stem and the surface of the hole in the ring cap through which the stem passes presents problems, one of which is that the external air which penetrates into the container can deteriorate the characteristics of the fluid substance contained therein, another being the fact that the fluid can seep or leak to the outside of the container through the said passageway when the container and pump lie in a horizontal position or with the pump facing downwards from the container.
  • the fluid substances to be dispensed by dispensers for their use can be contained in containers in which a pressurized gas is also present to normally expel the substances under pressure through dispensing devices acting similar to manually operable aerosol valves, the opening or closure of which enables or prevents dispensing of the substance.
  • pumps are also known for dispensing a fluid substance and a pressurized gas from a container containing the substance and the pressurizing gas hermetically sealed therein.
  • Such pumps have structures which seem similar to those of the pumps commonly used on containers which are not internally pressurized, but which are clearly different from them.
  • Such pumps present problems which have made them difficult to use, and in fact have prevented their practical utilization.
  • such pumps have substantially a form similar to that of a traditional pump but differ therefrom by comprising a cup-shaped body, the cavity of which is sealed by a ring cap sealedly applied to the mouth of a container in which a fluid substance and a pressurized gas are contained.
  • the cup-shaped body presents a chamber with a hole through which the fluid substance rises into the chamber by the effect of the pressure present in the container.
  • This chamber is bounded by a piston sealedly translatable along the inner surface of the cup-shaped body: a hollow stem connected to the piston emerges from and is sealedly translatable through a hole provided in the pump ring cap.
  • the cavity in the pump stem is closed by the piston urged by a compressed spring reacting against the cup-shaped body, which is closed by a unidirectional valve.
  • the main object of the present invention is to provide a pump which does not allow air, gas or liquids to pass between the outer surface of the respective stem and the surface of the hole in the pump ring cap, under any condition in which the pump is used.
  • Another object is to provide a pump which can be sealedly mounted on a container to define therewith a hermetically sealed space, from which however the pump can withdraw and dispense quantities of the fluid substance.
  • a further object is to provided a pump which can be easily primed (to enable, on initial use, the fluid substance to be withdrawn from the container on which the pump is mounted).
  • a pump for manually dispensing a quantity of fluid substance sealedly contained in a container comprising a cup-shaped body having an open end on which a ring cap is sealedly applied, and a closed end in which there is a hole provided with a unidirectional valve through which the fluid substance can enter a lower pump chamber from which the substance can be withdrawn to be dispensed to the outside by the pump, said lower chamber being bounded by an annular piston having a lip 4A sealedly translatable along the inner surface of the cup-shaped body and a lip 4B slidable along the outer surface of a hollow pump operating stem for dispensing the fluid substance through the free end of the stem 5 projecting from the pump, the cavity of the stem 5 opening at an aperture 70 provided in an intermediate region of the stem length in proximity to a lower collar 50 projecting from the stem into said pump lower chamber 8, from the stem 5 there also projecting an upper collar 60 on which there acts one end of a spring 30, the other end of which acts on said piston 4 to
  • a new and particularly interesting utilization of the pump of the present invention is that when the pump is mounted on a container such as to define therewith a hermetically sealed space in which the fluid substance present generates a pressurized gaseous phase; in particular there being present in this hermetically sealed space at least one low-boiling liquid having a saturated vapour pressure less than 1.00 kg/cm 2 at 15°C and less than 2.8 kg/cm 2 at 37.8°C, which generates a slight vapour pressure at an ambient temperature of 21°C.
  • Low-boiling liquids are fluid chemical substances which at 760 mm/Hg have boiling points between +15°C and +85°C.
  • Advantageously usable low-boiling liquids are those chosen from the group consisting of isopentane, isohexane, N-pentane, N-hexane, dichloromethane, monochloropropane, 1-1-dichloroethane, 2-chlorobutane, trichloro-fluoro-ethane CFC 11, trichloro-trifluoro-ethane CFC 113, ethyl ether, methylene-dimethylether, dimethoxymethane and acetone.
  • FIGS. 1 to 3 show a pump the general structure of which is of known type, except for the following details.
  • the pump has a structure totally similar to that of the pumps illustrated in the prior patents specified in the introduction to this description, and of which the teachings are incorporated herein for reference: the pump structure operation will therefore not be described in detail for brevity.
  • the pump comprises a cup-shaped body 1 closed at one end by a ring cap 2 and presenting at its other end a hole 3 which opens into the hollow space defined by a container (not shown in the drawings) on the mouth of which the pump ring cap 2 is mounted and sealed in any known manner (for example by seam-joining, or in another way).
  • the interior of the cup-shaped body houses an annular piston 4 having an annular lip 4A which is translatable along and seals against the inner surface of the cup-shaped body, and respectively an annular lip 4B which is translatable along and seals against the outer surface of a hollow stem 5 (on the free end of which an operating and dispensing pushbutton B of any known type is mounted) translatable axially through a hole provided in the flange 2.and along the cavity of which the fluid substance can be expelled to the outside (and hence used), having been previously drawn into a lower pump chamber 8 lying between the lower surface (with respect to the drawings) of the piston 4 and the pump intake hole 3 which houses a unidirectional valve consisting of a ball 11 (or other seal element) movable between a sealing seat provided at the upper end of the hole 3 and stop elements 13 forming part of the pump body.
  • An upper chamber 9 is defined in the cup-shaped body between the top of the piston 4 and the flange 2 and communicates with the outside of the cup-shaped body 1 via a hole or passageway 10 provided directly in the cup-shaped body: in this manner, when the pump is sealedly mounted on the mouth of a container, the pressure in the upper pump chamber 9 is always equal to the pressure in the container on which the pump is sealedly mounted (i.e. the pressure existing outside the cup-shaped body 1).
  • a hermetic seal exists between the outer surface of the stem 5 and the opposing surface of the hole in the ring cap 2 through which the stem extends and is translatable, and in the case of the embodiment shown in the figures is provided by a gasket or O-ring 12 of rubber or a suitable elastomeric material (although the seal between the stem and the hole in the ring cap can be provided in a different manner, for example by simply providing a lip, (not shown for simplicity), forming part of the ring cap 2, (which can be formed of deformable plastic material, such as polyethylene, polypropylene etc.).
  • An important characteristic of the pump of the present invention is that its hollow stem 5 is always housed and sealedly translatable (in all conditions under which the pump is used or is at rest) within the guide hole in the ring cap 2, and that additionally in the cup-shaped body 1 of the pump there is provided the hole or passageway 10 at the upper chamber 9 of the pump body.
  • the upper pump chamber 9 cannot enable liquids, air or gas to seep between the outer surface of the stem 5 and the ring cap hole through which this stem extends, if the ring cap 2 is mounted hermetically sealed on the mouth of a container (not shown for simplicity), there are no undesirable leakages or seepages of gas-phase product, air or fluids between the stem 5 and the gasket 12 of the ring cap 2.
  • the pressure in the upper pump chamber 9 is always equal (because of the presence of the passageway 10) to the pressure in the container on which the pump is sealedly mounted.
  • the pump is mounted on a deformable bag which is squeezed by atmospheric pressure; or if the pump is mounted on a rigid container.
  • a particularly interesting and advantageous use of the pump is that in which a rigid container (on which the pump is mounted such as to define a hermetically sealed space in the container interior) contains a fluid, semidense or pasty substance mixed with low-boiling liquids able to generate a slight vapour pressure under normal conditions of use, i.e. at about 21°C.
  • Low-boiling liquids are liquids having a saturated vapour pressure less than 1.00 kg/cm 2 at 15°C and less than 2.8 kg/cm 2 at 37.80°C.
  • Low-boiling liquids are fluid chemical substances which have boiling points between +15°C and +85°C and develop a pressure of 1 atm (about 760 mm/Hg).
  • Low-boiling liquids particularly advantageous for the aforestated use are those chosen from the group consisting of isopentane, isohexane, N-pentane, N-hexane, dichloromethane, monochloropropane, 1-1-dichloroethane, 2-chlorobutane, trichloro-fluoro-methane CFC 11, trichloro-trifluoro-ethane CFC 113, ethyl ether, methylene-dimethylether, dimethoxymethane and acetone.
  • the low-boiling liquid present in the container evaporates from its liquid phase present in the mixture and automatically restores the desired pressure within the container (slightly higher than atmospheric), to prevent formation of a vacuum in the container which would hinder continuation of mixture dispensing from the rigid container.
  • a characteristic of the pump described with reference to the drawings is that, when at rest, the pressure in the pump lower chamber 8 is equal to that in the upper chamber 9, so that the pressure acting on the upper and lower surfaces of the piston 4 is the same. It follows that to dispense the fluid substance through the cavity in the stem (on which the button B is mounted) the pressing force which has to be exerted on the stem (examining the figures from Figure 1 to Figure 3 ) is only that required to overcome the thrust of the two springs 20 and 30 and to compress the fluid substance collected and contained in the chamber 8 to cause the lip 4B of the piston 4 to separate from a corresponding seal seat provided in a collar 50 projecting from the lower part of the stem 5 within the pump chamber 8.
  • the lip 4B of the piston 4 is urged (by the spring 30 which rests on the collar 60 projecting from the upper part of the stem 5) against and onto the collar 50 to sealedly close the stem aperture 70, the purpose of which is to enable compressed fluid to pass from the chamber 8 to the stem cavity during fluid dispensing.
  • Pump operation therefore does not require a large force, and is equal to that required to dispense by pumps of known type mounted in known unsealed manner on fluid substance containers.
  • the collar 50 rests against a stop element 80 consisting of a constriction in the cross-section of the cup-shaped body 1 ( Figure 3 ), while the piston lip 4B remains resting on the adjacent upper surface of the collar 50, still sealedly closing the access aperture 70 to the stem cavity.
  • the pump On being initially used, the pump has to be primed, i.e. the air initially contained in the chamber 8 has to be expelled therefrom, to enable a vacuum to be formed in this chamber for drawing into it, through the hole 3, the fluid present in the container on which the pump is mounted.
  • short longitudinal ribs 90 project from the inner surface 8 of the cup-shaped body 1 in proximity to the stop element 80 provided therein, the bottom of the lip 4A resting on these to undergo deformation (when the pump is pressed to its travel limit, shown in Figures 3 , 3A and 4 ), to leave free those passageways (not numbered for simplicity but clearly visible in Figure 4 ) which enable the compressed air possibly present in the chamber 8 to rise upwards between the opposing surfaces of the piston and cup-shaped body 1, and discharge into the chamber 9 (and from there into the container, through the aperture 10), possibly causing inward flexure of the thin upper part of the lip 4A, at which recesses 100 visible in the cross-section of Figure 5 can be provided to allow free passage of air above the piston.
  • the pump can be easily primed.
  • the pump of the present invention is advantageously usable for dispensing pressurized fluids developing a saturated vapour pressure less than 2.8 kg/cm 2 at 54.4°C.

Landscapes

  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Reciprocating Pumps (AREA)
  • Closures For Containers (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Claims (4)

  1. Pumpe zum manuellen Abgeben einer Menge einer Fluidsubstanz, die abgedichtet in einem Container enthalten ist, umfassend einen tassenförmigen Körper (1) mit einem offenen Ende, auf dem eine Ringkappe (2) abdichtend angebracht ist, und einem geschlossenen Ende, in dem ein Loch (3) bereitgestellt ist, durch welches mittels eines unidirektionalen Ventils (11) die Fluidsubstanz in eine unter Pumpenkammer (8) eintreten kann, von der die Substanz ausgestoßen werden kann, um mittels der Pumpe nach Außen abgegeben zu werden, wobei die untere Kammer (8) durch einen ringförmigen Kolben (4) begrenzt ist, der einen Randabschluss (4A) hat, der entlang der inneren Oberfläche des tassenförmigen Körpers abdichtend versetzbar ist, und einen Randabschluss (4B) hat, der entlang der äußeren Oberfläche eines hohlen Pumpenbetriebsschafts (5) verrutschbar ist, zum Abgeben der Fluidsubstanz durch das freie Ende des Schafts (5), der von der Pumpe hervorsteht, wobei sich der Schafthohlraum an einer Öffnung (70) öffnet, die in einem Zwischenbereich der Schaftlänge in der Nähe eines unteren Bundes (50), der von dem Schaft in die untere Pumpenkammer (8) hervorsteht, bereitgestellt ist, wobei von dem Schaft (5) auch ein oberer Bund (60) hervorsteht, auf welchen ein Ende einer Feder (30) wirkt, wobei das andere Ende von dieser auf den Kolben (4) wirkt, um seinen Randabschluss (4B) hin zu und gegen den unteren Bund (50) zu drängen, um die Öffnung (70) zu schließen, wobei sich der Schaft durch ein Loch erstreckt und durch dieses axial versetzbar ist, welches in der Ringkappe (2) bereitgestellt ist, die mit dem Kolben eine obere Pumpenkammer (9) definiert, in welcher der obere Bund (60) des Schafts positioniert ist, dadurch gekennzeichnet, dass unter jeder Bedingung, in der die Pumpe verwendet wird, die äußere Oberfläche des Schafts (5) gegen die gegenüberliegende Oberfläche des Lochs in der Ringkappe abdichtet, dass in den tassenförmigen Körper (1) mindestens ein Durchlass (10) bereitgestellt ist, der die obere Kammer (9) mit dem Äußeren des tassenförmigen Körpers (1) verbindet, dass dort von dem tassenförmigen Körper (1) in die Kammer (8) ein Stoppelement (80) hervorsteht, auf welchem der untere Bund (50) ruht und anhält, wenn der Schaft (5) in seine Endbewegungs-Position gedrückt ist, wohingegen der Randabschluss (4B) des Kolbens (4), der entlang der äußeren Oberfläche des Schafts (5) verrutschbar ist, durch die Feder (30) hin zu und gegen den unteren Bund (50) gedrängt verbleibt, um die Schaftöffnung (70) zu schließen, dass von der inneren Oberfläche des tassenförmigen Körpers (1) in der Nähe und oberhalb des Stoppelements (80) mindestens eine kurze Längsrippe (90) hervorsteht, auf welcher die untere Kante des Kolbenrandabschnitts (4A) ruht und deformiert ist, um einen Durchlass zwischen dem Randabschnitt und der gegenüberliegenden Oberfläche des tassenförmigen Körpers frei zu lassen.
  2. Pumpe wie in Anspruch 1 beansprucht, dadurch gekennzeichnet, dass mindestens eine Längskerbe (100) in dem äußeren oberen Teil des Kolbenrandabschnitts (4A) bereitgestellt ist, um den Randabschnitt gegenüber der angrenzenden Oberfläche des tassenförmigen Körpers (1) lokal zu beabstanden.
  3. Pumpe wie in Ansprüchen 1 oder 2 beansprucht, dadurch gekennzeichnet, dass die Fluidsubstanz mit mindestens einer Flüssigkeit mit niedrigem Siedepunkt gemischt ist, die einen gesättigten Dampfdruck von weniger als 1,00 kg/cm2 bei 15°C und weniger als 2,8 kg/cm2 bei 37,8°C hat und Siedepunkte bei 760 mm/Hg zwischen +15°C und +85°C hat.
  4. Pumpe wie in Anspruch 3 beansprucht, dadurch gekennzeichnet, dass die Flüssigkeit mit niedrigem Siedpunkt aus der Gruppe ausgewählt ist, die besteht aus: Isopentan, Isohexan, N-Pentan, N-Hexan, Dichlormethan, Monochlorpropan, 1-1-Dichlorethan, 2-Chlorbutan, Trichlorfluormethan CFC 11, Trichlortrifluorethan CFC 113, Ethylether, Methyl-Dimethylether, Dimethoxymethan und Aceton.
EP06830528A 2006-03-09 2006-12-11 Pumpe zur manuellen abgabe eines in einem behälter enthaltenen fluiden stoffes Active EP1991362B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000423A ITMI20060423A1 (it) 2006-03-09 2006-03-09 Pompa per permettere la erogazione manuale di una sostanza fluida racchiusa a tenuta in un contenitore
PCT/EP2006/069558 WO2007101484A1 (en) 2006-03-09 2006-12-11 Pump for manually dispensing a fluid substance sealed in a container

Publications (2)

Publication Number Publication Date
EP1991362A1 EP1991362A1 (de) 2008-11-19
EP1991362B1 true EP1991362B1 (de) 2013-03-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06830528A Active EP1991362B1 (de) 2006-03-09 2006-12-11 Pumpe zur manuellen abgabe eines in einem behälter enthaltenen fluiden stoffes

Country Status (5)

Country Link
EP (1) EP1991362B1 (de)
CN (1) CN101400452A (de)
IT (1) ITMI20060423A1 (de)
TW (1) TWI376270B (de)
WO (1) WO2007101484A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102631407B1 (ko) * 2018-10-24 2024-01-31 에스케이하이닉스 주식회사 Ldpc 디코더, 반도체 메모리 시스템 및 그것의 동작 방법
FR3090417B1 (fr) * 2018-12-19 2020-12-18 Aptar France Sas Dispositif de distribution de produit fluide

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4230242A (en) * 1979-03-26 1980-10-28 Philip Meshberg Triple seal valve member for an atomizing pump dispenser
JPS58500845A (ja) * 1981-06-04 1983-05-26 デラウェア・ケミカルス・コーポレーション ポンプ
US6158617A (en) * 1996-10-30 2000-12-12 The Procter & Gamble Company Concentrated reduced dosage spray pump delivery system
FR2842875B1 (fr) * 2002-07-25 2006-02-10 Valois Sa Pompe de distribution de produit fluide a actionnement manuel

Also Published As

Publication number Publication date
CN101400452A (zh) 2009-04-01
EP1991362A1 (de) 2008-11-19
ITMI20060423A1 (it) 2007-09-10
TW200808449A (en) 2008-02-16
TWI376270B (en) 2012-11-11
WO2007101484A1 (en) 2007-09-13

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