EP1991362B1 - Pompe pour distribuer manuellement une substance fluide enfermée hermétiquement dans un contenant - Google Patents

Pompe pour distribuer manuellement une substance fluide enfermée hermétiquement dans un contenant 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
Prior art date
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Application number
EP06830528A
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German (de)
English (en)
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EP1991362A1 (fr
Inventor
Matteo Moretti
Gabriele Rampini
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Lumson SpA
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Lumson SpA
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Publication date
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Publication of EP1991362A1 publication Critical patent/EP1991362A1/fr
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    • 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.

Claims (4)

  1. Pompe permettant de distribuer manuellement une quantité de substance fluide contenue hermétiquement dans un contenant, comprenant un corps en forme de coupe (1) ayant une extrémité ouverte sur laquelle un bouchon annulaire (2) est appliqué de façon hermétique, et une extrémité fermée dans laquelle un trou (3) est prévu à travers duquel, via une soupape unidirectionnelle (11), la substance fluide peut entrer dans une chambre de pompe inférieure (8) à partir de laquelle la substance peut être expulsée pour être distribuée vers l'extérieur par la pompe, ladite chambre inférieure (8) étant délimitée par un piston annulaire (4) ayant une lèvre (4A) translatable de façon hermétique le long de la surface interne du corps en forme de coupe et une lèvre (4B) pouvant coulisser le long de la surface externe d'une tige d'actionnement de pompe creuse (5) permettant de distribuer la substance fluide à travers l'extrémité libre de la tige (5) faisant saillie à partir de la pompe, la cavité de tige s'ouvrant au niveau d'une ouverture (70) prévue dans une région intermédiaire de la longueur de tige à proximité d'un collier inférieur (50) faisant saillie à partir de la tige dans ladite chambre inférieure de pompe (8), un collier supérieur (60) faisant également saillie à partir de la tige (5), sur lequel agit une extrémité d'un ressort (30), dont l'autre extrémité agit sur ledit piston (4) afin de pousser sa lèvre (4B) vers et contre ledit collier inférieur (50) de façon à fermer ladite ouverture (70), ladite tige s'étendant et étant translatable axialement à travers un trou prévu dans ledit bouchon annulaire (2) qui, avec ledit piston, définit une chambre de pompe supérieure (9) dans laquelle ledit collier supérieur de tige (60) est positionné, caractérisé en ce que, dans toute condition dans laquelle la pompe est utilisée, la surface externe de la tige (5) est hermétique vis-à-vis de la surface opposée du trou dans le bouchon annulaire, au moins une voie de passage (10) étant prévue dans le corps en forme de coupe (1), laquelle raccorde ladite chambre supérieure (9) à l'extérieur dudit corps en forme de coupe (1), à partir du corps en forme de coupe (1), un élément de butée (80) faisant saillie dans ladite chambre (8) sur lequel ledit collier inférieur (50) repose et s'arrête lorsque la tige (5) est pressée vers sa position de fin de déplacement, alors que la lèvre (4B) du piston (4) pouvant coulisser le long de la surface externe de la tige (5) est maintenue poussée par le ressort (30) vers et contre ledit collier inférieur (50) afin de fermer ladite ouverture de tige (70), à partir de la surface interne du corps en forme de coupe (1) à proximité et au-dessus dudit élément de butée (80), au moins une nervure longitudinale courte (90) faisant saillie sur laquelle le bord inférieur de la lèvre de piston (4A) repose et est déformée pour laisser une voie de passage libre entre la lèvre et la surface opposée du corps en forme de coupe.
  2. Pompe selon la revendication 1, caractérisée en ce qu'au moins une rainure longitudinale (100) est prévue dans la partie supérieure externe de la lèvre de piston (4A) afin de tenir à distance localement ladite lèvre de la surface adjacente du corps en forme de coupe (1).
  3. Pompe selon la revendication 1 ou 2, caractérisée en ce que ladite substance fluide est mélangée avec au moins un liquide à point d'ébullition bas ayant une pression de vapeur saturante de moins de 1,00 kg/cm2 à 15 °C et moins de 2,8 kg/cm2 à 37,8 °C et ayant des points d'ébullition à 760 mm/Hg entre +15 °C et +85 °C.
  4. Pompe selon la revendication 3, caractérisée en ce que ledit liquide à point d'ébullition bas est choisi dans le groupe consistant en l'isopentane, l'isohexane, le N-pentane, le N-hexane, le dichlorométhane, le monochloropropane, le 1-1-dichloroéthane, le 2-chlorobutane, le trichloro-fluoro-méthane CFC 11, le trichloro-trifluoro-éthane CFC 113, l'éther éthylique, le méthylène-diméthyléther, le diméthoxyméthane et l'acétone.
EP06830528A 2006-03-09 2006-12-11 Pompe pour distribuer manuellement une substance fluide enfermée hermétiquement dans un contenant Active EP1991362B1 (fr)

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 (fr) 2006-03-09 2006-12-11 Pompe pour distribuer manuellement une substance fluide enfermée hermétiquement dans un contenant

Publications (2)

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

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ID=37806780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06830528A Active EP1991362B1 (fr) 2006-03-09 2006-12-11 Pompe pour distribuer manuellement une substance fluide enfermée hermétiquement dans un contenant

Country Status (5)

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

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
ATE21633T1 (de) * 1981-06-04 1986-09-15 Pharmasol Corp Druckbehaelter mit abgabepumpe.
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
EP1991362A1 (fr) 2008-11-19
ITMI20060423A1 (it) 2007-09-10
WO2007101484A1 (fr) 2007-09-13
TWI376270B (en) 2012-11-11
TW200808449A (en) 2008-02-16
CN101400452A (zh) 2009-04-01

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