US3203454A - Measuring cup attachment for pressure containers - Google Patents

Measuring cup attachment for pressure containers Download PDF

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Publication number
US3203454A
US3203454A US279961A US27996163A US3203454A US 3203454 A US3203454 A US 3203454A US 279961 A US279961 A US 279961A US 27996163 A US27996163 A US 27996163A US 3203454 A US3203454 A US 3203454A
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cup
sleeve
wall
measuring cup
liquid
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US279961A
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Lewis A Micallef
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Leeds and Micallef
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Leeds and Micallef
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    • 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
    • B65D83/28—Nozzles, nozzle fittings or accessories specially adapted therefor

Definitions

  • the object of the present invention is to provide a measuring cup wherein the flow of the liquid is so controlled as to provide a slowly rising level of the liquid in the cup which can be instantly cut off when the desired quantity has been discharged.
  • FIG. 1 is a vertical sectional view of the upper portion of a conventional so-called aerosol container equipped with my improved measuring cup;
  • FIG. 2 is a perspective view partially in section on an enlarged scale of the plug through which the flow of the liquid is controlled.
  • 1 indicates the body of the conventional aerosol container and 2 the top cap. Projecting upwardly from the cap 2 is a stem 4 through which the liquid is discharged when the stem is depressed.
  • the contents are discharged through an opening 5 in the side wall of the stem adjacent its top, usually in the form of a mist or spray.
  • the measuring cups of the prior art it has been proposed to surround the stem with a cup into which the contents are directly discharged through the opening 5.
  • the contents are not discharged directly from the stem into the cup but instead the liquid is discharged through a valve of novel construction which serves as a distributor for directing the liquid from the stern opening in all directions radially in a plane parallel with the bottom of the cup.
  • this valve is in the form of a plug 6 (see FIG. 2) which is press fitted into a central hole 7 in the bottom 8 of the measuring cup.
  • the cup is preferably of the form shown in FIG. 1 and comprises in addition to the bottom 8, side walls 9 of a height to give it the desired capacity.
  • the cup is provided with a downwardly extending marginal flange 10 which fits freely within the neck of the container, as shown in FIG. 1, when the cup is used.
  • the plug 6 as shown in FIG. 2 comprises a central tubular portion 11 which has a fluid-tight fit on the stem 4 and a cap portion 12 which is of greater diameter than the plug and fits against the bottom 8 around the opening 7.
  • the cap 12 is provided with a number of radial slots 13 which communicate at their inner ends with the central bore of the plug and serve to conduct the liquid dischar ed 3,203,454 Patented Aug. 31, 1965 from the openings 5 in different radial directions when the stem 4 is depressed to open the valve and permit the outflow of the liquid.
  • the plug 12 is of molded plastic and as will be noted the radial slots 13 are connected at their inner ends with a circumferential groove 14 at the upper end of the central bore of the plug, and at their outer ends with a circumferential groove 15 in underface of the plug.
  • the material of the cap extends radially beyond the circumferential groove 15 as shown .at 16 to form a marginal flange of reduced thickness which serves as a valve to prevent the backflow of the liquid when the discharge valve is closed, and also serves to direct the flow of liquid radially outward across the bottom wall of the cup throughout the entire circumference of the plug.
  • the cup In operation the cup is fitted on the stem 4 of the container as shown in FIG. 1, and when pressed downwardly will eifect the opening of the container valve and permit a discharge of the contents of the cup through the hole 5 into the annular groove 14 joining the inner ends of the radial groove 13. The liquid passes through the radial groove 13 into the outer circumferential groove 15 and thence under the marginal edges of the plug into the cup.
  • the area of discharge of the liquid is so enlarged and the liquid is so directed that under the usual pressure of aerosol containers the liquid flows quietly out around the margin of the plug, thereby producing a gradual rise of level in the cup so that an exact amount can be readily measured off.
  • a measuring cup for pressurized containers having a downwardly movable discharge valve operating member in an end wall, a tubular sleeve extending downwardly from the bottom wall of said cup, the bottom end of said sleeve being shaped to engage said member and surround the discharge opening of said container, said tubular sleeve extending above the bottom of said cup, discharge passages in the wall of said sleeve adjacent the inner face of the bottom wall of said cup, a closure for the end of said sleeve, said closure having a flange extending substantially beyond the wall of said sleeve and having at its outer edge an unbroken flat surface contacting the bottom wall of said cup and an annular groove within said flat surface, the discharge passages in said sleeve opening into said groove.

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  • 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)

Description

1965 L. A. MICALLEF 3,203,454
MEASURING CUP ATTACHMENT FOR PRESSURE CONTAINERS Filed May 15, 1963 FIG. I
llnlallll m Ill] INVENTOR. LEWIS A MICALLEF BY W WMZJ Md ATTORNEYS.
United States Patent 3,203,454 MEASURING CUP ATTACHMENT FOR PRESSURE CONTAINERS Lewis A. Micallef, New York, N.Y., assignor to Leeds and Micailet, New York, N.Y., a partnership Filed May 13, 1963, Ser. No. 279,961 3 Ciaims. (Cl. 141-113) This invention relates to attachments for pressure containers and has for its object to provide a measuring cup to facilitate the discharge of measured amounts of liquid from the container.
It has heretofore been proposed to provide measuring cups for so-called aerosol containers, but such cups have not been satisfactory for the reason that it is very diflicult to so regulate the pressure on the discharge valve as to confine the discharged liquid Within the walls of the cup.
The object of the present invention is to provide a measuring cup wherein the flow of the liquid is so controlled as to provide a slowly rising level of the liquid in the cup which can be instantly cut off when the desired quantity has been discharged.
In the accompanying drawings I have illustrated a preferred form of my invention and in the said drawings:
FIG. 1 is a vertical sectional view of the upper portion of a conventional so-called aerosol container equipped with my improved measuring cup; and
FIG. 2 is a perspective view partially in section on an enlarged scale of the plug through which the flow of the liquid is controlled.
Referring to the drawings, 1 indicates the body of the conventional aerosol container and 2 the top cap. Projecting upwardly from the cap 2 is a stem 4 through which the liquid is discharged when the stem is depressed.
In the ordinary use of the container above described the contents are discharged through an opening 5 in the side wall of the stem adjacent its top, usually in the form of a mist or spray. In the measuring cups of the prior art it has been proposed to surround the stem with a cup into which the contents are directly discharged through the opening 5. In my improved container the contents are not discharged directly from the stem into the cup but instead the liquid is discharged through a valve of novel construction which serves as a distributor for directing the liquid from the stern opening in all directions radially in a plane parallel with the bottom of the cup.
In the preferred embodiment of my invention as herein illustrated this valve is in the form of a plug 6 (see FIG. 2) which is press fitted into a central hole 7 in the bottom 8 of the measuring cup. The cup is preferably of the form shown in FIG. 1 and comprises in addition to the bottom 8, side walls 9 of a height to give it the desired capacity.
The cup is provided with a downwardly extending marginal flange 10 which fits freely within the neck of the container, as shown in FIG. 1, when the cup is used. The plug 6 as shown in FIG. 2 comprises a central tubular portion 11 which has a fluid-tight fit on the stem 4 and a cap portion 12 which is of greater diameter than the plug and fits against the bottom 8 around the opening 7. The cap 12 is provided with a number of radial slots 13 which communicate at their inner ends with the central bore of the plug and serve to conduct the liquid dischar ed 3,203,454 Patented Aug. 31, 1965 from the openings 5 in different radial directions when the stem 4 is depressed to open the valve and permit the outflow of the liquid.
The plug 12 is of molded plastic and as will be noted the radial slots 13 are connected at their inner ends with a circumferential groove 14 at the upper end of the central bore of the plug, and at their outer ends with a circumferential groove 15 in underface of the plug. The material of the cap extends radially beyond the circumferential groove 15 as shown .at 16 to form a marginal flange of reduced thickness which serves as a valve to prevent the backflow of the liquid when the discharge valve is closed, and also serves to direct the flow of liquid radially outward across the bottom wall of the cup throughout the entire circumference of the plug.
In operation the cup is fitted on the stem 4 of the container as shown in FIG. 1, and when pressed downwardly will eifect the opening of the container valve and permit a discharge of the contents of the cup through the hole 5 into the annular groove 14 joining the inner ends of the radial groove 13. The liquid passes through the radial groove 13 into the outer circumferential groove 15 and thence under the marginal edges of the plug into the cup.
By my improved construction the area of discharge of the liquid is so enlarged and the liquid is so directed that under the usual pressure of aerosol containers the liquid flows quietly out around the margin of the plug, thereby producing a gradual rise of level in the cup so that an exact amount can be readily measured off.
I claim:
1. A measuring cup for pressurized containers having a downwardly movable discharge valve operating member in an end wall, a tubular sleeve extending downwardly from the bottom wall of said cup, the bottom end of said sleeve being shaped to engage said member and surround the discharge opening of said container, said tubular sleeve extending above the bottom of said cup, discharge passages in the wall of said sleeve adjacent the inner face of the bottom wall of said cup, a closure for the end of said sleeve, said closure having a flange extending substantially beyond the wall of said sleeve and having at its outer edge an unbroken flat surface contacting the bottom wall of said cup and an annular groove within said flat surface, the discharge passages in said sleeve opening into said groove.
2. The measuring cup of claim 1 wherein the tubular sleeve and end closure therefor are formed in one piece fixedly supported in the bottom wall of said cup.
3. The measuring cup of said claim 1 for use in connection with containers in which the discharge valve is located in an annular recess in the container wall wherein the bottom wall of said cup has an annular extension to fit within said recess.
References Cited by the Examiner UNITED STATES PATENTS 2,722,227 11/55 Blann 141360 X 2,811,289 10/57 Davis et al. 222394 2,907,358 10/59 Armstrong 141360 2,913,749 11/59 Ayres 222-894 3,109,558 11/63 Yetter 141--352 X LAVERNE D. GEIGER, Primary Examiner.

Claims (1)

1. A MEASURING CUP FOR PRESSURIZED CONTAINERS HAVING A DOWNWARDLY MOVABLE DISCHARGE VALVE OPERATING MEMBER IN AN END WALL, A TUBULAR SLEEVE EXTENDING DOWNWARDLY FROM THE BOTTOM WALL OF SAID CUP, THE BOTTOM END OF SAID SLEEVE BEING SHAPED TO ENGAGE SAID MEMBER, AND SURROUND THE DISCHARGE OPENING OF SAID CONTAINER, SAID TUBULAR SLEEVE EXTENDING ABOVE THE BOTTOM OF SAID CUP, DISCHARGE PASSAGES IN THE WALL OF SAID SLEEVE ADJACENT THE INNER FACE OF THE BOTTOM WALL OF SAID CUP, A CLOSURE FOR THE END OF SAID SLEEVE, SAID CLOSURE HAVING A FLANGE EXTENDING SUBSTANTIALLY BEYOND THE WALL OF SAID SLEEVE AND HAVING AT ITS OUTER EDGE AN UNBROKEN FLAT SURFACE CONTACTING THE BOTTOM WALL OF SAID CUP AND AN ANNULAR GROOVE WITHIN SAID FLAT SURFACE, THE DISCHARGE PASSAGES IN SAID SLEEVE OPENING INTO SAID GROOVE.
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Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365138A (en) * 1966-07-18 1968-01-23 Scovill Manufacturing Co Actuator button and dispensing nozzle for aerosol valve
US3456650A (en) * 1966-11-29 1969-07-22 Gilbert Schwartzman Blowback eliminator for collapsible tube
US3456851A (en) * 1968-04-24 1969-07-22 Kimberly Clark Co Device for applying lubricant to tampons
DE2218394A1 (en) * 1971-04-23 1973-10-25 Laeaeke Ag AEROSOL SPRAY DEVICE FOR THE INTRAcutaneous or epicutaneous administration of a medicinal product, disinfectant, cosmetic product, etc.
US3770170A (en) * 1972-08-28 1973-11-06 Vca Corp Confining hand-held dispenser cap
US3841532A (en) * 1972-12-26 1974-10-15 K Gores Dispensing pan for aerosol container
US3915345A (en) * 1971-05-11 1975-10-28 Stanley Harrison Aerosol can for dispensing materials in fixed volumetric ratio
FR2429038A1 (en) * 1978-06-23 1980-01-18 Goldwell Gmbh METHOD FOR MAKING COSMETIC PREPARATIONS WITH MULTIPLE COMPONENTS AND APPARATUS FOR CARRYING OUT SAID METHOD
US4212332A (en) * 1978-02-21 1980-07-15 Security Plastics, Inc. Manually operated pump for dispensing product from a container
US4349129A (en) * 1979-12-03 1982-09-14 The Procter & Gamble Company Portable, measured volume dispenser
US4420099A (en) * 1981-06-10 1983-12-13 Precision Valve Corporation Cup-shaped actuator for aerosol dispenser
WO1984001222A1 (en) * 1982-09-22 1984-03-29 Robert L Childs Alcohol breath tester
US4492319A (en) * 1982-08-09 1985-01-08 Cooper Clinton T Method and apparatus for enhancing the fire combatant properties of safety cans
US5127553A (en) * 1990-09-17 1992-07-07 Primary Delivery Systems, Inc. Metered liquid squeeze bottle
US5261569A (en) * 1991-10-31 1993-11-16 The Procter & Gamble Company Squeezable container for liquid material having a detachable measuring cap
US5617978A (en) * 1994-07-18 1997-04-08 Coster Tecnologie Speciali S.P.A. Apparatus for dispensing a semifluid medium
USD380384S (en) * 1995-05-15 1997-07-01 Precision Valve Corporation Dispensing actuator cap
US6644510B2 (en) 2001-06-29 2003-11-11 The Meyer Company Bag-in-box container and faucet
US20050056343A1 (en) * 2003-09-12 2005-03-17 L'oreal Device for packaging and dispensing a cosmetic or another care product
US20060108377A1 (en) * 2004-11-19 2006-05-25 Glynn Kenneth P Metered dose squeeze dispenser
US20060110205A1 (en) * 2004-11-19 2006-05-25 Glynn Kenneth P Metered dose squeeze dispenser with brush
US7222755B2 (en) 2004-11-19 2007-05-29 Glynntech, Inc. Metered dose squeeze dispenser with flexible-T dip tube
US7331489B2 (en) 2004-11-19 2008-02-19 Glynntech, Inc. Metered dose squeeze dispenser having a dip tube with a rotatable leg
US20090199764A1 (en) * 2008-02-12 2009-08-13 Daniel Ball Paint Supplying System and Apparatus
US20100043911A1 (en) * 2006-03-06 2010-02-25 Charles Russell Drinking Vessel Fillable from the Bottom and Apparatus for Dispensing a Beverage Therein
US8646661B2 (en) 2011-03-23 2014-02-11 Alan Paine Aerosol can liquid dispenser
US8733599B2 (en) 2012-01-19 2014-05-27 Lloyd HORNLAND Combined cap and actuator device for aerosol container
US20150090738A1 (en) * 2013-09-27 2015-04-02 Emsar S.P.A Actuating device for a dispensing pump of a dispenser
US20150122015A1 (en) * 2012-06-14 2015-05-07 Koninklijke Philips N.V. Capacitive level sensor
WO2016071880A1 (en) * 2014-11-07 2016-05-12 Ip Evolution Sa Beaker that can be filled from the bottom and connecting device for the beaker
US9924773B2 (en) * 2012-08-31 2018-03-27 Kao Germany Gmbh Valve, bowl for receiving and/or mixing fluids, use of a bowl and method for receiving and/or mixing fluids
US20180118551A1 (en) * 2015-04-14 2018-05-03 Drink Up Device for filling a container with beverages through the bottom of said container
US10591337B1 (en) * 2014-05-16 2020-03-17 Aptargroup, Inc. Dispensing cup for aerosol device
US10588438B2 (en) * 2015-11-25 2020-03-17 King's Flair Marketing Limited Fluid dispenser with reflux mechanism
US10849406B2 (en) * 2014-12-02 2020-12-01 L'oreal System for dispensing at least one makeup product and method for dispensing and evaluating makeup
US10925377B2 (en) 2014-12-02 2021-02-23 L'oreal Dispensing system having at least two outlet interfaces
US11076680B2 (en) 2014-12-02 2021-08-03 L'oreal System for dispensing a makeup product
US11225373B2 (en) 2014-12-02 2022-01-18 L'oreal Assembly comprising an airbrush

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2722227A (en) * 1954-06-08 1955-11-01 Toledo Scale Co Revolving rinse mechanism
US2811289A (en) * 1955-10-11 1957-10-29 Whitmire Res Lab Inc Aerosol bomb valve and guard
US2907358A (en) * 1955-04-11 1959-10-06 John C Armstrong Tooth powder containers
US2913749A (en) * 1958-03-19 1959-11-24 John M Wittke Applicator for pressurized package
US3109558A (en) * 1962-12-05 1963-11-05 Crown Ind Products Company Method of and apparatus for charging a spray tank

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2722227A (en) * 1954-06-08 1955-11-01 Toledo Scale Co Revolving rinse mechanism
US2907358A (en) * 1955-04-11 1959-10-06 John C Armstrong Tooth powder containers
US2811289A (en) * 1955-10-11 1957-10-29 Whitmire Res Lab Inc Aerosol bomb valve and guard
US2913749A (en) * 1958-03-19 1959-11-24 John M Wittke Applicator for pressurized package
US3109558A (en) * 1962-12-05 1963-11-05 Crown Ind Products Company Method of and apparatus for charging a spray tank

Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365138A (en) * 1966-07-18 1968-01-23 Scovill Manufacturing Co Actuator button and dispensing nozzle for aerosol valve
US3456650A (en) * 1966-11-29 1969-07-22 Gilbert Schwartzman Blowback eliminator for collapsible tube
US3456851A (en) * 1968-04-24 1969-07-22 Kimberly Clark Co Device for applying lubricant to tampons
DE2218394A1 (en) * 1971-04-23 1973-10-25 Laeaeke Ag AEROSOL SPRAY DEVICE FOR THE INTRAcutaneous or epicutaneous administration of a medicinal product, disinfectant, cosmetic product, etc.
US3915345A (en) * 1971-05-11 1975-10-28 Stanley Harrison Aerosol can for dispensing materials in fixed volumetric ratio
US3770170A (en) * 1972-08-28 1973-11-06 Vca Corp Confining hand-held dispenser cap
US3841532A (en) * 1972-12-26 1974-10-15 K Gores Dispensing pan for aerosol container
US4212332A (en) * 1978-02-21 1980-07-15 Security Plastics, Inc. Manually operated pump for dispensing product from a container
FR2429038A1 (en) * 1978-06-23 1980-01-18 Goldwell Gmbh METHOD FOR MAKING COSMETIC PREPARATIONS WITH MULTIPLE COMPONENTS AND APPARATUS FOR CARRYING OUT SAID METHOD
US4294293A (en) * 1978-06-23 1981-10-13 Goldwell Gmbh Method of mixing cosmetic multi-component preparations and set of apparatus for the practice of the method
US4349129A (en) * 1979-12-03 1982-09-14 The Procter & Gamble Company Portable, measured volume dispenser
US4420099A (en) * 1981-06-10 1983-12-13 Precision Valve Corporation Cup-shaped actuator for aerosol dispenser
US4492319A (en) * 1982-08-09 1985-01-08 Cooper Clinton T Method and apparatus for enhancing the fire combatant properties of safety cans
WO1984001222A1 (en) * 1982-09-22 1984-03-29 Robert L Childs Alcohol breath tester
US5127553A (en) * 1990-09-17 1992-07-07 Primary Delivery Systems, Inc. Metered liquid squeeze bottle
US5261569A (en) * 1991-10-31 1993-11-16 The Procter & Gamble Company Squeezable container for liquid material having a detachable measuring cap
US5617978A (en) * 1994-07-18 1997-04-08 Coster Tecnologie Speciali S.P.A. Apparatus for dispensing a semifluid medium
USD380384S (en) * 1995-05-15 1997-07-01 Precision Valve Corporation Dispensing actuator cap
US6644510B2 (en) 2001-06-29 2003-11-11 The Meyer Company Bag-in-box container and faucet
US20050056343A1 (en) * 2003-09-12 2005-03-17 L'oreal Device for packaging and dispensing a cosmetic or another care product
US7377296B2 (en) * 2003-09-12 2008-05-27 L'oreal Device for packaging and dispensing a cosmetic or another care product
US7222755B2 (en) 2004-11-19 2007-05-29 Glynntech, Inc. Metered dose squeeze dispenser with flexible-T dip tube
US7331489B2 (en) 2004-11-19 2008-02-19 Glynntech, Inc. Metered dose squeeze dispenser having a dip tube with a rotatable leg
US7350673B2 (en) 2004-11-19 2008-04-01 Glynntech, Inc. Metered dose squeeze dispenser
US20060108377A1 (en) * 2004-11-19 2006-05-25 Glynn Kenneth P Metered dose squeeze dispenser
US7549816B2 (en) 2004-11-19 2009-06-23 Glynntech, Inc. Metered dose squeeze dispenser with brush
US20060110205A1 (en) * 2004-11-19 2006-05-25 Glynn Kenneth P Metered dose squeeze dispenser with brush
US8899281B2 (en) * 2006-03-06 2014-12-02 Charles Russell Drinking vessel fillable from the bottom and apparatus for dispensing a beverage therein
US20100043911A1 (en) * 2006-03-06 2010-02-25 Charles Russell Drinking Vessel Fillable from the Bottom and Apparatus for Dispensing a Beverage Therein
US20090199764A1 (en) * 2008-02-12 2009-08-13 Daniel Ball Paint Supplying System and Apparatus
US8210216B2 (en) * 2008-02-12 2012-07-03 Ball Daniel W Paint supplying system and apparatus
US8646661B2 (en) 2011-03-23 2014-02-11 Alan Paine Aerosol can liquid dispenser
US8733599B2 (en) 2012-01-19 2014-05-27 Lloyd HORNLAND Combined cap and actuator device for aerosol container
US20150122015A1 (en) * 2012-06-14 2015-05-07 Koninklijke Philips N.V. Capacitive level sensor
US9924773B2 (en) * 2012-08-31 2018-03-27 Kao Germany Gmbh Valve, bowl for receiving and/or mixing fluids, use of a bowl and method for receiving and/or mixing fluids
US20150090738A1 (en) * 2013-09-27 2015-04-02 Emsar S.P.A Actuating device for a dispensing pump of a dispenser
US10591337B1 (en) * 2014-05-16 2020-03-17 Aptargroup, Inc. Dispensing cup for aerosol device
CH710343A1 (en) * 2014-11-07 2016-05-13 Ip Évolution Sa Cup for filling from below and connection device for the cup.
WO2016071880A1 (en) * 2014-11-07 2016-05-12 Ip Evolution Sa Beaker that can be filled from the bottom and connecting device for the beaker
US10849406B2 (en) * 2014-12-02 2020-12-01 L'oreal System for dispensing at least one makeup product and method for dispensing and evaluating makeup
US10925377B2 (en) 2014-12-02 2021-02-23 L'oreal Dispensing system having at least two outlet interfaces
US11076680B2 (en) 2014-12-02 2021-08-03 L'oreal System for dispensing a makeup product
US11225373B2 (en) 2014-12-02 2022-01-18 L'oreal Assembly comprising an airbrush
US20180118551A1 (en) * 2015-04-14 2018-05-03 Drink Up Device for filling a container with beverages through the bottom of said container
US10588438B2 (en) * 2015-11-25 2020-03-17 King's Flair Marketing Limited Fluid dispenser with reflux mechanism

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