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WO1990008075A1 - Doseur pressurise - Google Patents

Doseur pressurise Download PDF

Info

Publication number
WO1990008075A1
WO1990008075A1 PCT/GB1989/001050 GB8901050W WO9008075A1 WO 1990008075 A1 WO1990008075 A1 WO 1990008075A1 GB 8901050 W GB8901050 W GB 8901050W WO 9008075 A1 WO9008075 A1 WO 9008075A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas chamber
dispenser
liquid
reservoir
port
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/GB1989/001050
Other languages
English (en)
Inventor
Terence Edward Weston
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.)
Microvol Ltd
Original Assignee
Microvol Ltd
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 Microvol Ltd filed Critical Microvol Ltd
Publication of WO1990008075A1 publication Critical patent/WO1990008075A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/44—Valves specially adapted for the discharge of contents; Regulating devices
    • B65D83/52—Metering valves; Metering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
    • G01F11/10—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation
    • G01F11/12—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements
    • G01F11/14—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber reciprocates
    • G01F11/16—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber reciprocates for liquid or semiliquid

Definitions

  • This invention relates to a pressurised metering dispenser, and more particularly to a dispenser for dispensing pre-determined volumes of liquid.
  • a pressurised metering dispenser comprising a reservoir for containing gas under pressure in an upper part and liquid to be dispensed in a lower adjoining part, characterised by a gas chamber formed in and normally communicating with said upper part, valve means extending through said lower part and terminating in an external nozzle, and metering means communicating with the gas chamber and defining a metered volume of liquid, the valve means having a first port communicating with the metering means and a second port communicating with the nozzle and being movable against biasing means between a rest position (in which the gas chamber communicates with the reservoir) and a dispensing position (in which the gas chamber is sealed from the reservoir and the second port is in communication with the metering means, enabling gas from the gas chamber to dispense the metered volume of liquid out through the nozzle so that the pressure in the gas chamber is reduced to ambient pressure), and wherein during the return movement to the said rest position the valve means passes through an intermediate position in which the gas chamber is still sealed from the reservoir but the
  • a dispenser in accordance with the invention overcomes the problem of trapped gas bubbles, and gives improved repeatability, ie. reduced variation in the volume of liquid dispensed.
  • the valve means may be a valve spindle axially slidable in a valve assembly and having an axial bore extending into the gas chamber.
  • the valve assembly may be formed with a channel with which the first and second ports communicate when in the dispensing position.
  • a groove may be formed above the first port, whereby when the spindle is in the intermediate position liquid can flow through the groove and the channel and up through the bore to the gas chamber.
  • the channel, the first port and the bore thus together constitute the metering means, and by varying the diameter of the bore, so the desired metered volume of liquid can be readily altered.
  • the gas chamber may be defined by a cylinder, and the top of the spindle may then be in the form of a piston sealably slidable into the cylinder.
  • the bottom of the cylinder is preferably slotted to enable excess liquid to flow out of the gas chamber, after the metering means has been refilled.
  • Figure 1 is a side view in section of a pressurised metering dispenser embodying the invention in a refilling position;
  • Figure 2 is an enlarged sectional view of the upper and lower ends of the dispenser of Figure 1 in its rest position;
  • Figure 3 is a view similar to Figure 2 with the dispenser in a dispensing position;
  • Figure 4 is an enlarged sectional view of the upper end of a modified dispenser in a rest position corresponding to Figure 2;
  • Figure 5 is a sectional view of the upper and lower ends of another dispenser similar to that shown in Figures 1 to 3 and suitable for putting into production.
  • the dispenser shown has a tubular body 2 closed by an upper cap 4 and a lower cap 6.
  • a cylinder 8 mounted under the upper cap 4 in axial alignment with the tubular body 2 is a cylinder 8 in which a valve piston 10 is sealingly slidable.
  • the piston 10 has a bore 12 and provides a sealed fit over a tube 14 communicating with the bore.
  • the bottom of the tube 14 is connected to a valve spindle 16 the bottom of which terminates in a nozzle 18 extendin out through the lower cap 6.
  • the spindle has an upper radial port 20, which communicates via a central bore 22 in the spindle with the tube 14, and a lower radial bore 24 which communicates with the nozzle 18.
  • the spindle 16 is vertically slidable in a two-part valve assembly 28 which is sealed to the body 2 by an O-ring seal 30.
  • the body 2 constitutes a main reservoir which is typically half filled with a liquid 32 to be dispensed, and the remaining volume above the liquid is filled with an inert gas 34 such as Nitrogen, pressurised typically to a pressure of 8 bar.
  • an inert gas 34 such as Nitrogen
  • the lower end of the cylinder 8 is formed with slots 36 so that in the rest position of Figure 2 the gas chamber defined by the cylinder remains in communication with the pressurised gas 34 through the slots 36.
  • the spindle has a land area 38 which, in the dispensing position of Figure 3, is in sealing engagement with an annular seal 40 in the top part of the valve assembly 28.
  • An axial groove 44 is provided in the valve spindle 16 immediately above the land 40, so that in the position of Figure 1 liquid 32 can flow past the seal .40, along a channel 42 formed in the valve assembly and into the upper port 20.
  • the gas chamber is now again in communication with the main reservoir, via the slots 36 at the bottom of the cylinder 8, enabling the gas chamber to become recharged with gas under pressure and allowing surplus liquid to flow over the inclined upper face of the piston 10 and back into the reservoir to join the main liquid 32. Complete and rapid drainage of such surplus liquid is assisted by adding a surfactant to the liquid.
  • the cylinder 108 in this case has holes 109 formed at the top which communicate with the reservoir of pressurised gas 134.
  • the piston 110 has a lower slidable seal 111, similar to that of piston 10, and an upper slidable seal 113 which always remains within the cylinder 108.
  • An annular space 115 is formed between the seals 111 and 113, and this communicates with the bore 112 in the tube 114 via a radial opening 117 in the piston.
  • the space 115 constitutes the gas chamber which, when the nozzle (eg.as nozzle 18) is pushed upwards, becomes enclosed within the cylinder 108 and causes the metered liquid in the tube 114 to be expelled. As previously, when the nozzle is then returning downwards under the bias of a compression spring (not shown) acting upon the seal 113, the chamber 115 will be at atmospheric pressure and therefore draws in liquid into the metered volume of the tube 114 etc.
  • Figure 5 shows the upper and lower ends of another dispenser which is of a simple design particularly suitable for putting into production.
  • the parts to be described which are similar to those of Figures 1 to 3 ar here indicated by the original reference numerals increased by 200.
  • the tubular body is in this case replaced by an inverted cylindrical bottle or flask 202 which encloses the upper end 207 of the dispenser and constitutes the main reservoir.
  • the flask 202 is sealingly secured to the valve assembly 228 by a clamping ring 203, so as to retai the liquid under pressure (not shown) in the flask.
  • An open sided structure 205 extends upwards from the valv assembly 228, enabling liquid to pass through a groove or cut away 244 in the valve spindle 216 and to the channel 242 in the assembly.
  • the structure 205 secures a cylinde
  • the closed top of the cylinder being spaced a short distance below the concave upper end 207 of the flask 202.
  • the cylinder 108 is formed with a lower seal
  • the tube 214 acts as a valve or piston, with its outside surface sealingly contacting the cylinder seal 209.
  • a short distance beneath its top face the tube 214 has a cut away portion 211, the bottom edge 213 of which determines the final level to which the tube will be filled with the metered volume of liquid. Any excess liquid entering the cylinder 228 during refilling of the tube will then escape in the rest position shown.
  • the gas dispenser described has a good repeatability, ie. the volume or dose of metered fluid dispensed at each shot only varies by a small amount.
  • the dispenser also overcomes the problems of bubble formation in the metered liquid volume, by driving the gas bubbles ahead of the liquid.
  • a further advantage of the dispenser is that the metered volume can readily be altered by providing a range of sizes of tube of differing internal diameter.
  • a typical tube may, for example, have a length of about 90mm and an internal diameter of 0.6mm.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

Doseur permettant de distribuer un volume prédéterminé de liquide par un ajutage (18), qui comprend un réservoir de liquide (32) dont la partie supérieure (34) contient du gaz sous pression. L'ajutage est connecté à une tige de soupape (16) et à un tube (14) qui remontent dans le réservoir pour aboutir dans la chambre de gaz (8). Lorsque l'ajutage (18) est repoussé vers le haut, le volume dosé se trouvant dans le tube et la tige est éjecté sous la pression du gaz. Si l'on relâche l'ajutage, le liquide du réservoir peut couler à travers un orifice (20) dans la tige (16) et remonter dans le tube (14) pour remplir à nouveau l'espace de volume dosé. En position normale de repos, l'orifice (20) ne communique plus avec le réservoir (32), et tout liquide excédentaire dans la chambre (8) retourne par des fentes (36) dans le réservoir.
PCT/GB1989/001050 1989-01-12 1989-09-07 Doseur pressurise Ceased WO1990008075A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898900670A GB8900670D0 (en) 1989-01-12 1989-01-12 Pressurised metering dispenser
GB8900670.4 1989-01-12

Publications (1)

Publication Number Publication Date
WO1990008075A1 true WO1990008075A1 (fr) 1990-07-26

Family

ID=10649943

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1989/001050 Ceased WO1990008075A1 (fr) 1989-01-12 1989-09-07 Doseur pressurise

Country Status (2)

Country Link
GB (1) GB8900670D0 (fr)
WO (1) WO1990008075A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29908878U1 (de) 1999-05-20 1999-08-12 Schäfer, Rainer, 45147 Essen Ausgabevorrichtung zur dosierten Ausgabe von Flüssigkeiten
US6170717B1 (en) * 1996-12-27 2001-01-09 Glaxo Wellcome Inc. Valve for aerosol container
WO2001064345A3 (fr) * 2000-02-29 2002-01-31 Boston Innovation Inc Distribution de liquide en microvolume
WO2003016832A3 (fr) * 2001-08-13 2003-05-30 Boston Innovation Inc Melanges et distributions microfluidiques
US6620383B1 (en) * 2000-02-29 2003-09-16 Boston Innovation Inc. Microvolume liquid dispensing device
US6706538B1 (en) * 2000-02-29 2004-03-16 Boston Innovation Inc. Microvolume liquid dispensing array
US7459128B2 (en) 2002-08-13 2008-12-02 Molecular Bioproducts, Inc. Microfluidic mixing and dispensing
US7592185B2 (en) 2004-02-17 2009-09-22 Molecular Bioproducts, Inc. Metering doses of sample liquids
WO2018015648A1 (fr) * 2016-07-22 2018-01-25 Nbread-Process Dispositif pour déposer une quantité précise de produit
WO2018055047A1 (fr) * 2016-09-22 2018-03-29 Aer Beatha Limited Bombe et soupape
CN116115868A (zh) * 2023-03-31 2023-05-16 艾特美(苏州)医药科技有限公司 用于定量雾化装置的袋阀组件及定量雾化装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003662A (en) * 1959-09-14 1961-10-10 Meshberg Philip Device and method for dispensing material under pressure of an immiscible gas
FR1299724A (fr) * 1961-06-16 1962-07-27 Anciens Etablissements E Rober Perfectionnements aux dispositifs distributeurs de doses de produits déterminées volumétriquement
JPS5644060A (en) * 1979-09-17 1981-04-23 Toyo Aerosol Kogyo Kk Intermittent injection valve for aerosol
WO1988004638A1 (fr) * 1986-12-17 1988-06-30 Microvol Limited Doseur fonctionnant sous pression

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003662A (en) * 1959-09-14 1961-10-10 Meshberg Philip Device and method for dispensing material under pressure of an immiscible gas
FR1299724A (fr) * 1961-06-16 1962-07-27 Anciens Etablissements E Rober Perfectionnements aux dispositifs distributeurs de doses de produits déterminées volumétriquement
JPS5644060A (en) * 1979-09-17 1981-04-23 Toyo Aerosol Kogyo Kk Intermittent injection valve for aerosol
WO1988004638A1 (fr) * 1986-12-17 1988-06-30 Microvol Limited Doseur fonctionnant sous pression

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Vol. 5, No. 102 (C-061), 2 July 1981; & JP-A-56044060 (Toyo Aerosol Kogyo) 23 April 1981 *

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6170717B1 (en) * 1996-12-27 2001-01-09 Glaxo Wellcome Inc. Valve for aerosol container
US6966467B2 (en) 1996-12-27 2005-11-22 Smithklinebeecham Corporation Valve for aerosol container
US7350676B2 (en) 1996-12-27 2008-04-01 Smithkline Beecham Corporation Valve for aerosol container
DE29908878U1 (de) 1999-05-20 1999-08-12 Schäfer, Rainer, 45147 Essen Ausgabevorrichtung zur dosierten Ausgabe von Flüssigkeiten
WO2001064345A3 (fr) * 2000-02-29 2002-01-31 Boston Innovation Inc Distribution de liquide en microvolume
US6620383B1 (en) * 2000-02-29 2003-09-16 Boston Innovation Inc. Microvolume liquid dispensing device
US6706538B1 (en) * 2000-02-29 2004-03-16 Boston Innovation Inc. Microvolume liquid dispensing array
WO2003016832A3 (fr) * 2001-08-13 2003-05-30 Boston Innovation Inc Melanges et distributions microfluidiques
US7459128B2 (en) 2002-08-13 2008-12-02 Molecular Bioproducts, Inc. Microfluidic mixing and dispensing
US7592185B2 (en) 2004-02-17 2009-09-22 Molecular Bioproducts, Inc. Metering doses of sample liquids
US8043865B2 (en) 2004-02-17 2011-10-25 Molecular Bioproducts, Inc. Metering doses of sample liquids
US8080218B2 (en) 2004-02-17 2011-12-20 Molecular Bio-Products, Inc. Metering doses of sample liquids
WO2018015648A1 (fr) * 2016-07-22 2018-01-25 Nbread-Process Dispositif pour déposer une quantité précise de produit
FR3054205A1 (fr) * 2016-07-22 2018-01-26 Nbread-Process Dispositif pour deposer une quantite precise de produit
US11447279B2 (en) 2016-07-22 2022-09-20 Nbread-Process Device for depositing a precise quantity of product
WO2018055047A1 (fr) * 2016-09-22 2018-03-29 Aer Beatha Limited Bombe et soupape
US10906729B2 (en) 2016-09-22 2021-02-02 Aer Beatha Limited Canister and valve
EP3978391A1 (fr) * 2016-09-22 2022-04-06 Aer Beatha Limited Réservoir et soupape
CN116115868A (zh) * 2023-03-31 2023-05-16 艾特美(苏州)医药科技有限公司 用于定量雾化装置的袋阀组件及定量雾化装置

Also Published As

Publication number Publication date
GB8900670D0 (en) 1989-03-08

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