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WO1998018563A1 - Ensemble distributeur pour pulverisateur, pulverisateur equipe d'un tel ensemble distributeur et element d'etancheite conçu pour un tel ensemble - Google Patents

Ensemble distributeur pour pulverisateur, pulverisateur equipe d'un tel ensemble distributeur et element d'etancheite conçu pour un tel ensemble Download PDF

Info

Publication number
WO1998018563A1
WO1998018563A1 PCT/NL1997/000590 NL9700590W WO9818563A1 WO 1998018563 A1 WO1998018563 A1 WO 1998018563A1 NL 9700590 W NL9700590 W NL 9700590W WO 9818563 A1 WO9818563 A1 WO 9818563A1
Authority
WO
WIPO (PCT)
Prior art keywords
dispensing assembly
dispensing
return valve
piston
piston chamber
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.)
Ceased
Application number
PCT/NL1997/000590
Other languages
English (en)
Inventor
Edgar Ivo Maria Van Der Heijden
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.)
Park Towers International BV
Albea Alkmaar NV
Original Assignee
Park Towers International BV
Airspray NV
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 Park Towers International BV, Airspray NV filed Critical Park Towers International BV
Priority to AU47283/97A priority Critical patent/AU4728397A/en
Publication of WO1998018563A1 publication Critical patent/WO1998018563A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • B05B11/00442—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means the means being actuated by the difference between the atmospheric pressure and the pressure 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
    • B05B11/1001—Piston pumps
    • 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
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means

Definitions

  • Dispensing assembly for a sprayer, sprayer provided with such a dispensing assembly and a sealing element therefor
  • the present invention relates in the first place to a dispensing assembly for a sprayer, intended for dispensing a liquid, at least comprising an outflow channel which opens out into a dispensing aperture, a dispensing pump with a piston which is movable in a piston chamber, and a control part interacting with the pump, the wall of the piston chamber comprising an aeration aperture for aerating a container from which the liquid is being extracted, while a non-return valve interacts with the aeration aperture.
  • the non-return valve is formed by a valve element made of elastomeric material in the shape of a truncated cone, which interacts with the cylindrical piston chamber below the aeration aperture.
  • the valve element is provided with an annular flange which is clamped between the top end of the neck of the liquid reservoir and a bearing flange of the cylindrical piston chamber.
  • the circular aperture at the truncated end of the valve element rests under pre- stress against the outside of the cylindrical piston chamber of the dispensing pump.
  • the pre-stress of the valve element must be relatively high, but this means that the valve element will be able to open only when there are relatively high pressure differences between the environment and the interior of the sprayer. Furthermore, the external surface of the cylindrical piston chamber can easily become damaged during transport, with the result that the sealing action of the valve element is adversely affected.
  • the object of the invention is to improve the above dispensing assembly, and to that end the invention is characterized in that the non-return valve is situated in the aeration aperture.
  • This embodiment has the advantage that the nonreturn valve can be made more compact in design, with the result that the non-return valve can be manufactured more accurately and the pre-stress of the non-return valve can be set at a lower value.
  • the dispensing assembly will therefore react to small pressure differences.
  • the contact face of the non-return valve with the edge of the aeration aperture is small, and the contact face is recessed in the wall of the piston chamber, with the result that said contact face will not be subject to damage. This means that a good sealing action of the non-return valve will always be ensured.
  • the aeration aperture with the non-return valve can be disposed at any position in the piston chamber wall, but in a specific embodiment the aeration aperture is situated in the wall of the piston chamber opposite the piston. Contrasting with the known dispensing assembly according to the prior art, the use of a non-return valve in the aeration aperture will mean that the aeration aperture can be made in the wall of the piston chamber opposite the piston, in other words, the bottom of the piston chamber, which brings considerable advantages as regards manufacture.
  • the aeration aperture is consequently situated upstream of the piston chamber, viewed in the release direction of the mould, as against the lateral aeration aperture in the dispensing assembly according to the prior art, in which one or more moving mandrels must always be present in the mould in order to produce the aeration apertures.
  • the non-return valve comprises a sealing element fitted in the aeration aperture, which sealing element comprises a sealing disc with a central bar which extends substantially perpendicular to the sealing disc and is provided at the end with a number of projections, and which at least locally has a smaller diameter than the aeration aperture, the projections on the inside of the piston wall and the sealing disc on the outside of the piston wall clamping the piston wall under pre-stress.
  • Dispensing assemblies often have one or more non-return valves between the dispensing pump(s) present therein and the outflow channel or the dispensing aperture, in order to permit liquid or air to be sucked up into the piston chamber concerned and dispensed therefrom through the outflow channel.
  • the pre-stress of the non-return valve according to the invention is preferably selected in such a way that the latter cannot be opened during dispensing of liquid. The above can be achieved in a simple manner by making the pre-stress of the non-return valve according to the invention greater than the pre-stress of any valves which may be present between the dispensing pumps and the dispensing aperture.
  • the invention also provides a sprayer, compris- ing a container for liquid to be dispensed and a dispensing assembly, which is characterized in that the dispensing assembly is a dispensing assembly according to the invention.
  • Fig. 1 shows a part of a known piston chamber, with an aeration aperture according to the prior art
  • Fig. 2 shows a piston chamber according to Fig. 1, with an aeration aperture and non-return valve according to the invention
  • Fig. 3 shows an embodiment of a dispensing assembly according to the invention, with non-return valve in the bottom of the piston chamber;
  • Fig. 4 shows the operation of the non-return valve according to Figs . 2 and 3.
  • Fig. 1 shows a part of a known dispensing assembly with an air piston chamber 1, and a piston chamber wall 2 containing an aeration aperture 3.
  • a piston 4 can be moved up and down in the air piston chamber 1 by a control part which is not shown.
  • one or more separate pumps are present for liquid to be dispensed or for other constituents.
  • a coaxial liquid pump, surrounded by the air piston 4 and the air piston chamber 1 is usually present. However, for the sake of clarity, these are not shown in any further detail here. Only the operation of the aeration aperture 3 will be explained.
  • the wall 2 of the air piston chamber 1 comprises a flange 5 which, with the interposition of suitable sealing means, can usually be fixed on the opening of a container, often a bottle. After fixing, the interior of the container is therefore situated at the position of 6.
  • the piston 4 comprises an annular sealing element 8, which comprises a top sealing edge 9 and a bottom sealing edge 10.
  • a non-return valve 11 is also present in the piston chamber, which non-return valve serves to permit air to be sucked up into the air piston chamber 1 and dispensed therefrom.
  • Such a nonreturn valve 11 is often a dual -action valve, which regulates both the supply of air to and discharge thereof from the piston chamber 1.
  • the air piston 4 is moved downwards, so that the volume of the piston chamber 1 is reduced and air is dispensed.
  • liquid or another material is dispensed from the container, usually by means of a separate pump.
  • the sealing edge 9 moves downwards past the aeration aperture 3
  • the aeration aperture is in open communication with the environment by way of the space 7 and any other apertures.
  • the volume of said removed liquid or material is made up with air through the aeration aperture 3.
  • the seal between the sealing edge 9 and the wall 2 of the piston chamber 1 is often inadequate.
  • an air piston chamber 1 may, of course, also be a liquid piston chamber in a sprayer in which liquid alone is dispensed, and in which only one pump is therefore present.
  • Fig. 2 shows an embodiment of a part of a dis- pensing assembly according to the invention, in which a non-return valve 15 is present.
  • the dispensing assembly comprises at least two pumps, with coaxial piston chambers, only the outermost air piston chamber 1 of which is shown.
  • This figure shows in greater detail the dual-action valve 11, which can be designed, for example, as described in EP-A-0 613 728 (Daiwa) .
  • the piston 4 in this embodiment comprises an annular part 8 with a sealing edge 10, and in this case the sealing edge 9 is omitted, in order to prevent the possibility that it could become caught behind the nonreturn valve 15. It will be clear that in the event of the non-return valve 15 being recessed in the wall 2, said sealing edge can be present, but this is not necessary .
  • non-return valve 15 is in no way dependent on the movement or state of the air piston 4, since it depends solely on the pressure in the container 6. If during dispensing of liquid or material from the container 6 the negative pressure occurring there becomes so low that it exceeds the pre-tension of the nonreturn valve 15, the non-return valve will open and air will be sucked up by way of 7 from the environment.
  • aeration aperture 3 is present in a bottom 16 of the piston chamber 1, and to that end the piston chamber is provided locally at 17 with a deformation, in order to permit accommodation of the aeration aperture 3 with the non-return valve 15.
  • This embodiment has the very important advantage that during manufacture of the dispensing assembly, for example by injection moulding, the aeration aperture is situated in the release direction of a mould to be used, which produces very considerable cost savings during manufacture .
  • the pre-stress of the non-return valve 15 must be selected relative to that of the dual -action valve 11 or other pre-stress valves present in such a way that when air is dispensed from the piston chamber 1 during use of the sprayer the non-return valve is not opened .
  • Fig. 4 shows the operation of the non-return valve 15 according to the invention.
  • Said non-return valve comprises a sealing element 20, consisting of a sealing disc 21 with a bar-shaped part 22 which comprises a number of lugs 23 at the end.
  • the bar- shaped part 22 has a smaller external diameter than the internal diameter of the aeration aperture 3.
  • One of the two can also be provided with grooves or the like, in order to produce the same effect.
  • a stepped recess 24 is present, with a shoulder 25 on which the sealing disc 21 rests.
  • the aeration aperture 3 is also provided with a slightly bevelled wall 26, in order to simplify the insertion of the sealing element 20.

Landscapes

  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

Cette invention se rapporte à un ensemble distributeur conçu pour un pulvérisateur et servant à distribuer un liquide, ledit ensemble comportant au moins un canal d'écoulement qui débouche dans une ouverture de distribution, une pompe distributrice dotée d'un piston (4) qui peut se déplacer dans une chambre de piston (1) et une pièce de commande interagissant avec la pompe. La paroi de la chambre de piston comporte une ouverture d'aération (3) interagissant avec un clapet anti-retour (15) de manière à aérer un contenant à partir duquel le liquide est extrait, le clapet anti-retour (15) étant situé dans ladite ouverture d'aération (3).
PCT/NL1997/000590 1996-10-29 1997-10-28 Ensemble distributeur pour pulverisateur, pulverisateur equipe d'un tel ensemble distributeur et element d'etancheite conçu pour un tel ensemble Ceased WO1998018563A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU47283/97A AU4728397A (en) 1996-10-29 1997-10-28 Dispensing assembly for a sprayer, sprayer provided with such a dispensing assembly and a sealing element therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1004374A NL1004374C2 (nl) 1996-10-29 1996-10-29 Afgeefsamenstel voor een spuitbus, een spuitbus met een dergelijk afgeefsamenstel en een daarvoor bestemd dichtingselement.
NL1004374 1996-10-29

Publications (1)

Publication Number Publication Date
WO1998018563A1 true WO1998018563A1 (fr) 1998-05-07

Family

ID=19763752

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1997/000590 Ceased WO1998018563A1 (fr) 1996-10-29 1997-10-28 Ensemble distributeur pour pulverisateur, pulverisateur equipe d'un tel ensemble distributeur et element d'etancheite conçu pour un tel ensemble

Country Status (3)

Country Link
AU (1) AU4728397A (fr)
NL (1) NL1004374C2 (fr)
WO (1) WO1998018563A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001017690A1 (fr) * 1999-09-09 2001-03-15 Valois S.A. Pompe de distribution de produit fluide amelioree, et dispositif de distribution de produit fluide comportant une telle pompe
CN102464134A (zh) * 2011-11-21 2012-05-23 福建三明福欣源乳液泵有限公司 一种弹簧外置乳液泵
WO2015038692A1 (fr) * 2013-09-13 2015-03-19 Gojo Industries, Inc. Distributeurs pour récipients non repliables et pompes d'aération
US9596963B2 (en) 2014-07-30 2017-03-21 Gojo Industries, Inc. Vented refill units and dispensers having vented refill units
US9648992B2 (en) 2013-12-19 2017-05-16 Gojo Industries, Inc. Pumps with vents to vent inverted containers and refill units having non-collapsing containers
US10160590B2 (en) 2014-02-24 2018-12-25 Gojo Industries, Inc. Vented non-collapsing containers, dispensers and refill units having vented non-collapsing containers

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2075992A1 (fr) * 1970-01-08 1971-10-15 Diamond Int Corp
DE8535472U1 (de) * 1984-12-28 1986-02-06 Spray Plast S.p.A., Romano d'Ezzelino, Vicenza Spritzgerät
EP0171462A2 (fr) * 1984-08-14 1986-02-19 Ing. Erich Pfeiffer GmbH & Co. KG Dispensateur pour matériau coulant
EP0613728A2 (fr) 1993-03-05 1994-09-07 Daiwa Can Company Réservoir à pompe pour la distribution de mousse

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2075992A1 (fr) * 1970-01-08 1971-10-15 Diamond Int Corp
EP0171462A2 (fr) * 1984-08-14 1986-02-19 Ing. Erich Pfeiffer GmbH & Co. KG Dispensateur pour matériau coulant
DE8535472U1 (de) * 1984-12-28 1986-02-06 Spray Plast S.p.A., Romano d'Ezzelino, Vicenza Spritzgerät
EP0613728A2 (fr) 1993-03-05 1994-09-07 Daiwa Can Company Réservoir à pompe pour la distribution de mousse

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001017690A1 (fr) * 1999-09-09 2001-03-15 Valois S.A. Pompe de distribution de produit fluide amelioree, et dispositif de distribution de produit fluide comportant une telle pompe
CN102464134A (zh) * 2011-11-21 2012-05-23 福建三明福欣源乳液泵有限公司 一种弹簧外置乳液泵
WO2015038692A1 (fr) * 2013-09-13 2015-03-19 Gojo Industries, Inc. Distributeurs pour récipients non repliables et pompes d'aération
US9648992B2 (en) 2013-12-19 2017-05-16 Gojo Industries, Inc. Pumps with vents to vent inverted containers and refill units having non-collapsing containers
US10160590B2 (en) 2014-02-24 2018-12-25 Gojo Industries, Inc. Vented non-collapsing containers, dispensers and refill units having vented non-collapsing containers
US9596963B2 (en) 2014-07-30 2017-03-21 Gojo Industries, Inc. Vented refill units and dispensers having vented refill units
US9936840B2 (en) 2014-07-30 2018-04-10 Gojo Industries, Inc. Vented refill units and dispensers having vented refill units

Also Published As

Publication number Publication date
AU4728397A (en) 1998-05-22
NL1004374C2 (nl) 1998-05-06

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