US3370759A - Fluid dispenser with alternate discharge floating piston - Google Patents

Fluid dispenser with alternate discharge floating piston Download PDF

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Publication number
US3370759A
US3370759A US512079A US51207965A US3370759A US 3370759 A US3370759 A US 3370759A US 512079 A US512079 A US 512079A US 51207965 A US51207965 A US 51207965A US 3370759 A US3370759 A US 3370759A
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United States
Prior art keywords
piston
work chamber
fluid
valve
work
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Expired - Lifetime
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US512079A
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English (en)
Inventor
Johansson Gustav Adolf
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Danfoss AS
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Danfoss AS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D1/00—Apparatus or devices for dispensing beverages on draught
    • B67D1/08—Details
    • B67D1/10—Pump mechanism
    • B67D1/101—Pump mechanism of the piston-cylinder type
    • B67D1/102—Pump mechanism of the piston-cylinder type for one liquid component only
    • B67D1/103—Pump mechanism of the piston-cylinder type for one liquid component only the piston being driven by a liquid or a gas
    • B67D1/104—Pump mechanism of the piston-cylinder type for one liquid component only the piston being driven by a liquid or a gas by the liquid to be dispensed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B3/26—Methods or devices for controlling the quantity of the material fed or filled
    • B65B3/30—Methods or devices for controlling the quantity of the material fed or filled by volumetric measurement
    • B65B3/32—Methods or devices for controlling the quantity of the material fed or filled by volumetric measurement by pistons co-operating with measuring chambers

Definitions

  • ABSTRACT OF THE DISCLOSURE This apparatus comprises a double acting floating piston in a cylinder having valved inlet-outlet orifices at each end, with piston carried magnet means cyclicly controlling the operation of the inlet and outlet valves.
  • This invention relates to apparatus for drawing a fluid from a source of supply.
  • a cylinder carrying a piston the piston being movable axially of the cylinder in both directions.
  • the piston is operated by a power supply which is located entirely outside of the cylinder.
  • the power supply is a motor, power from which is transmitted to the piston to reciprocate the piston within the cylinder by means of a pistonshaft extending through an end wall of the cylinder and carrying the piston at its end within the cylinder, a packing being provided about the entrance of the piston shaft into the cylinder to prevent undue leakage of the fluid from the cylinder.
  • the need for a packing is a disadvantage as this adds to the cost and complexity of the construction of the apparatus, further, because packings are never entirely satisfactory, always allowing some leakage of the fluid, and, finally, because packings wear out and require periodic replacement.
  • Another disadvantage of the apparatus of the prior art is that it draws oil fluid from source of supply only on every other stroke. Accordingly, this apparatus is only half as efficient as it would be if it drew fluid from the source of supply on every stroke.
  • a first stroke of the piston is required to draw fluid from the source of supply into the cylinder, during which'stroke no fluid is being forced from the cylinder to fill a container, and a second stroke to force the fluid from the cylinder to fill a container, during which second stroke the cylinder is not refilled from the source of supply.
  • This cycle repeats and it is seen that only on every other stroke does the apparatus serve to fill a container, which is its ultimate purpose.
  • an apparatus which does not have the above mentioned disadvantages of the prior art.
  • means defining a hollow cylindrical chamber and a piston slidably mounted in the hollow cylindrical chamber for reciprocation therein, the piston, however, not being mounted on a piston shaft. Since the piston is not mounted on a piston shaft, a piston shaft entrance and a'packing for a piston shaft entrance ar entirely obviated. A piston shaft is not used because the 7 piston is not driven by a power supply, such as a motor,
  • the mounting of the piston in the hollow cylindrical chamber simply consists in the sliding engagement of the piston with the cylindrical internal surface of the hollow cylindrical chamber, and accordingly, the piston may be referred to as being mounted to move freely along th axis of the hollow cylindrical chamber.
  • a work chamber is established in the hollow cylindrical chamber, at each side of the piston.
  • the term work chamber indicates that each of these chambers is fully operative in contributing toward the ultimate purpose of the apparatus, i.e., the drawing of the fluid from a source of supply to fill containers. Specifically, to each of the work chambers the fluid is drawn from the source of supply and from each of the work chambers the fluid which has been drawn thereto is forced from the work chamber and accordingly may be used to fill a container.
  • an inlet conduit communicating between the source of supply of the fluid and each of the work chambers, each of these inlet conduits being provided wtih a valve, and an outlet conduit opening from each of the work chambers, each of these outlet conduits being provided with a valve.
  • valve in the inlet conduit communicating with a first one of the work chambers is set at an open position and the valve in the inlet conduit communicating with the second work chamber is set at a closed position while, simultaneously, the valve in the outlet conduit from the first Work chamber is set at a closed position and the valve in the outlet conduit from the second work chamber is set at an open position.
  • the pressure of the fluid at the source of supply is set to a level higher than the pressure inside the hollow cylindrical chamber. Accordingly, the fluid flows from the source of supply to the first work chamber through the inlet conduit communicating between the source of supply and the first work chamber. The fluid thus taken into the first work chamber cannot flow out therefrom since the valve in the outlet conduit opening from the first work chamber is set at a closed position. Accordingly, the fluid in the first work chamber pushes the piston to expand or enlarge the first work chamber and accordingly compress fluid in the second work chamber.
  • the apparatus is initially primed by admitting a quantity of the fluid to the second work chamber; as in the case of a pump, priming need be performed only prior to the first cycle of operation.
  • the fluid contained therein is forced out of the second work chamber through the outlet conduit opening from the second work chamber.
  • the containers to be filled may be filled directly from the outlet conduit from the second work chamber or the outlet conduit from the second work chamber may communicate with a distribution conduit from which the containers may be filled.
  • the piston thus having completed a stroke in the hollow cylindrical chamber, the setting of each of the valves is reversed, i.e., from open to closed and from closed to open.
  • This 2-stroke cycle mayibe continuously repeated sim- , ⁇ ply by periodically reversing the settings of all of the Wolves as above described.
  • the apparatus of the present invention unlike the apparatus of the ipriorart, will provide on every stroke of the piston a quantity of the fluid to be charged into the containers to beiilled.
  • a first sensing means disposed externally of and adjacent to the hollow cylindrical chamber and a second sensing means similarly disposed but axially spaced, with respect to the axis of the hollow cylindrical chamber, from the first sensing means.
  • a signal output means mounted for movement with the piston.
  • the signal output means may be mounted on or in the piston. The sensing means and the signal output means are selected so that the sensing means is responsive to the output of the signal output means.
  • the signal output means may be a magnet, the output therefrom being a magnetic field
  • the sensing means may be a magnetically activated switch in an electric circuit for operating the valve whereby passage of the piston carrying the magnet to a position adjacent one of the sensing means will activate the switch.
  • Each of the sensing means is operatively connected to the valve and the response induced in the sensing means by the signal output means is employed to reverse the setting of each of the valves.
  • the valves themselves may be solenoid valves, electric motor actuated valves, pneumatically actuated valves,
  • the invention is particularly convenient for drawing off a liquid from a source of supply wherein the pressure of the liquid at the source of supply is only its autogeneous pressure, i.e., its own vapor pressure. In such a system no external source of power would be required other than for the actuation of the valves. Refrigerants and aerosol propellants may conveniently be maintained in a source of supply at their autogeneous pressure. It will be appreciated from the foregoing description of the invention that in such a case the autogeneous pressure of the liquid is latent energy which is employed to drive the apparatus.
  • a piston 2 Mounted in a hollow cylindrical chamber 1 for free sliding movement therein is a piston 2.
  • a packing may be provided between the piston 2 and the internal face of the cylindrical wall of the cylindrical hollow chamber 1, to provide an essentially fluid-tight seal between a first work chamber 3 defined at the left-hand side of the piston 2 and a second work chamber 4 defined at the right-hand side of the piston 2.
  • a storage container 5 constitutes a source of supply of the fluid, in this case a liquid refrigerant 16.
  • a space 18 for vapor from the liquid refrigerant 16 is provided at the upper portion of the storage container 5. Accordingly, the liquid refrigerant 16 is at its autogeneous pressure in the storage container 5.
  • a heating jacket 17 is provided about the storage container 5 to heat the liquid refrigerant 16 therein so that its autogeneous pressure is at a desired level.
  • the conduit 6 with its branch 6' constitutes an inlet conduit to the work chamber 3 from the storage container 5.
  • the conduit 6 with its branch 6 constitutes an inlet conduit to the work chamber 4 from the storage container 5.
  • a valve 7 is provided in the inlet conduit to the work chamber 3 and a valve 8 is provided in the inlet conduit to the work chamber 4.
  • An outlet conduit 11' which is provided with a valve 9, communicates with the work chamber 3.
  • an outlet conduit 11- which is provided with a valve 10,
  • Outlet conduits 11' and 11" joint a common outlet conduit 11.
  • the common outlet conduit 11 may be provided with a valve 12.
  • a pair of discharge conduits 13 and 14 may communicate through the valve 12 with common outlet 11.
  • the valve 12 has at least two positions, namely a position establishing communication between common outlet conduit 11 and discharge conduit 13 and a position establishing communication between common outlet conduit 11 and discharge conduit 14.
  • Thevalve 12 may have a third position, namely a shut-off or completely closed position, i.e., the valve 12 may be a three-way valve and is illustrated as such in the drawing.
  • a magnet 19 which serves as a signal output means.
  • the sensing means 20 and 21 are operatively connected to the valves 7, 8, 9, 10 and 12. As illustrated, the'valves are solenoid valves and the operative connection between the sensing means20 and 21 and the valves may constitute conventional electrical circuitry (not shown).
  • the apparatus would be primed by admitting a quantity of the liquid refrigerant 16 into one of the work chambers.
  • the valves 7 and 10 are each set to a closed position'and the valve 8 is set to an open position.
  • the temperature of the liquid refrigerant 16 in'the storage container 5 has been setto a level at which the autogeneous pressure of the liquid refrigerant 16 'in the storage container 5 will exceed the pressure of the liquid refrigerant in either work chamber When't'he work chamber is :being compressed.
  • a quantity of the refrigerant '16 is taken, through conduits 6 and 6" into the work chamber 4 and by this step the apparatus has now been primed for operation. Accordingly, what will now be described applies to the continuous operation of the apparatus.
  • the piston 2 is adjacent the sensing means 20. Accordingly, magnet 19 is adjacent to sensing means 20 and sensing means 20 responds by setting valves 7 and 10 to an open position, valves 8 and 9 to a closed position and valve 12 to a position establishing communication between common outlet conduit 11 and discharge conduit 13.
  • a refrigerant capsule 15 to be filled with the liquid refrigerant 16 is positioned at the outlet opening of discharge conduit 13 (as indicated by the arrow). The liquid refrigerant 16 is driven into the work chamber 3 and causes the Work chamber 3 to increase in size and the Work chamber 4 simultaneously to be decreased in size by pushing the piston 2 to the right of one viewing the drawing.
  • the sensing means 21 responds to the magnet 19 by reversing the setting of each of the valves 7, 8, 9 and 10, i.e., from open to closed and viceversa, and by changing the setting of valve 12 to establish communication between common outlet conduit 11 and discharge conduit 14 rather than discharge conduit 13.
  • the refrigerant capsule 15 if not yet filled is moved from the outlet of discharge conduit 13 to the outlet of discharge conduit 14 or if refrigerant capsule 15 is filled a new refrigerant capsule is positioned at the outlet of discharge conduit 14.
  • the discharge conduits 13 and 14 may be individually provided with capsules to be filled.
  • the liquid refrigerant 16 is drawn through conduits 6 and 6" into the work chamber 4 and the piston 2 is pushed by the liquid refrigerant to the viewers left in the drawing with the expansion of the work chamber 4 and simultaneous compression of the work chamber 3.
  • the compression of the work chamber 3 by the piston 2 drives the liquid refrigerant in the work chamber 3 out of the work chamber 3 through conduits 11', 11 and ultimately discharge conduit 14 from which is filled a refrigerant capsule with the liquid refrigerant.
  • conduits 11, 13 and 14 and valve 12 are not necessary to the practice of the invention, for the fluid may be discharged directly from the conduits 11 and 11", these conduits not joining in a common conduit.
  • An apparatus for drawing a fluid from a source of supply comprising means defining a hollow cylindrical chamber both ends of which are closed, a free floating piston slidably mounted in the hollow cylindrical chamher, two work chambers thus being defined, one at each side of the piston, an inlet conduit communicating between the source of supply and each of said work chambers, a valve in each of said inlet conduits, an outlet conduit opening from each of said work chambers and a valve in each of said outlet conduits, a first sensing means disposed externally on said cylinder and a second sensing means disposed externally on said cylinder, said second sensing means being axially spaced, with respect to the axis of said cylinder, from said first sensing means and signal output means comprising a magnet mounted on said piston, said first and second sensing means being responsive to the magnetic field output of said signal output means when adjacent thereto, means operatively connecting the first and second sensing means with the valves in the inlet and outlet conduits so that when the piston is adjacent to the first sensing means and
  • outlet conduit from each of said chambers communicates downstream with a common outlet conduit and said common outlet conduit communicates downstream with two distribution conduits through a distribution valve having one setting communicating with a first of the distribution conduits only and another position communicating with a second of the distribution conduits only.
  • Apparatus for delivering in metered quantities a fluid from a source of supply comprising, means defining a hollow cylindrical chamber, a free floating piston reciprocable in said hollow cylindrical chamber defining two work chambers on each side of the piston, inlet means for each of said work chambers of fluid from said source of supply, discharge conduit means from each of said work chambers, detection means to detect the axial position of said piston, valve means responsive to the detection means for allowing flow into said work chambers alternately and out of said work chambers alternately to allow metered quantities of fluid to be discharged from the work chambers alternately as a function of the de tected lengths of stroke of said piston.
  • source of supply comprises a liquid refrigerant container, means to heat said refrigerant to cause said refrigerant to have a desired vapor pressure causing flow of said refrigerant to said work chambers at a desired pressure.
  • said detection means comprises means for sensing a magnetic field, and magnet means travelling with said piston generating a magnetic field.
  • said detection means comprises two means for sensing magnetic fields positionable axially at desired spaced axial positions determining the measured quantities as a function of the axial spacings between said two means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reciprocating Pumps (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
US512079A 1964-12-15 1965-12-07 Fluid dispenser with alternate discharge floating piston Expired - Lifetime US3370759A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED46060A DE1217232B (de) 1964-12-15 1964-12-15 Vorrichtung zum Abfuellen von Fluessigkeiten

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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483666A (en) * 1967-01-03 1969-12-16 Olinkraft Inc Filling device
US3913787A (en) * 1971-01-12 1975-10-21 Lawrence Dilger Metering system and control therefor
US4191184A (en) * 1977-01-06 1980-03-04 Carlisle Jeffrey A Intravenous infusion regulation system with reciprocal metering means
US4279360A (en) * 1978-02-25 1981-07-21 Wilhelm Hedrich Vakuumanlagen Gmbh & Co. K.G. System for feeding two synthetic-resin components to a mold
US4369805A (en) * 1978-11-15 1983-01-25 Amiad Mutzarei Yiul Liquid metering injector assembly
US4386716A (en) * 1978-02-23 1983-06-07 Becton Dickinson And Company Liquid measuring device
US4966306A (en) * 1986-07-18 1990-10-30 The Coca-Cola Company Beverage dispenser system using volumetric ratio control device
US5361870A (en) * 1993-09-13 1994-11-08 Courcy Richard R Transmission fluid exchange apparatus
US5381926A (en) * 1992-06-05 1995-01-17 The Coca-Cola Company Beverage dispensing value and method
US5871068A (en) * 1994-10-18 1999-02-16 Selby; Theodore W. Device for precise replacement of liquids, before, during, or after operation of a mechanism with method of use thereof
US5992696A (en) * 1998-02-24 1999-11-30 Sealant Equipment & Engineering, Inc. Manifold for a metering cylinder
US6019196A (en) * 1995-10-10 2000-02-01 Theodore W. Selby Bag-containing device for precise replacement of liquid before, during, or after operation of a mechanism, and method of its use
US6296153B1 (en) * 1999-10-06 2001-10-02 S.O.B. Partnership Self-contained high pressure pneumatic beverage dispensing system
US6378657B2 (en) 1991-10-23 2002-04-30 James P. Viken Fluid exchange system
US6435307B2 (en) 1998-07-09 2002-08-20 Theodore W. Selby Precise replacement of liquids and components in a liquid mixture
US20050036896A1 (en) * 2003-08-15 2005-02-17 Navarro Ramon M. Sanitary pump and sanitary valve
US20050133304A1 (en) * 1991-10-23 2005-06-23 Viken James P. Fluid exchange system for vehicles
US20160257549A1 (en) * 2014-07-13 2016-09-08 Lev Volftsun Beverage Dispensing System
US10167183B1 (en) * 2015-04-14 2019-01-01 Sestra Systems, Inc System and method for beverage dispensing
US11124406B1 (en) * 2014-07-13 2021-09-21 Sestra Systems, Inc. System and method for piston detection in a metering mechanism for use with beverage dispensing system
US11192770B1 (en) * 2015-04-15 2021-12-07 Sestra Systems Self serve beverage by the glass
US11378433B2 (en) * 2015-04-15 2022-07-05 Sestra Systems Inc Manifold style metering mechanism for use with beverage dispensing system
US11673787B1 (en) * 2015-04-15 2023-06-13 Sestra Systems Inc Empty keg detection for carbonated beverages

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004045355A1 (de) * 2004-09-17 2006-04-06 Tesa Ag Verfahren und Vorrichtung zum Abgeben eines bei hohem Druck dosierten Flüssigkeitsstroms

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US939382A (en) * 1909-02-03 1909-11-09 Stanley D Beard Automatic burette.
US1932976A (en) * 1926-06-16 1933-10-31 Illum Inc Metering-filling machine
GB698685A (en) * 1950-11-01 1953-10-21 Danco Exp & Imp Ltd Apparatus for delivering measured quantities of liquid
FR1077943A (fr) * 1953-05-30 1954-11-12 Auxiliaire De Verification Et Appareils pour la mesure de débits de courant gazeux de faible importance
US2755966A (en) * 1950-05-01 1956-07-24 Lindars Herman Apparatus for dispensing measured quantities of liquid materials
US2882999A (en) * 1956-06-21 1959-04-21 Timken Roller Bearing Co Apparatus for measuring lubricant or the like
US3119522A (en) * 1961-04-12 1964-01-28 Culligan Inc Metering device
US3283957A (en) * 1964-01-27 1966-11-08 Henderson William Dick Liquid proportioning system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1138657B (de) * 1960-01-26 1962-10-25 Gaskell & Chambers Ltd Vorrichtung zum Ausschenken von Fluessigkeiten

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US939382A (en) * 1909-02-03 1909-11-09 Stanley D Beard Automatic burette.
US1932976A (en) * 1926-06-16 1933-10-31 Illum Inc Metering-filling machine
US2755966A (en) * 1950-05-01 1956-07-24 Lindars Herman Apparatus for dispensing measured quantities of liquid materials
GB698685A (en) * 1950-11-01 1953-10-21 Danco Exp & Imp Ltd Apparatus for delivering measured quantities of liquid
FR1077943A (fr) * 1953-05-30 1954-11-12 Auxiliaire De Verification Et Appareils pour la mesure de débits de courant gazeux de faible importance
US2882999A (en) * 1956-06-21 1959-04-21 Timken Roller Bearing Co Apparatus for measuring lubricant or the like
US3119522A (en) * 1961-04-12 1964-01-28 Culligan Inc Metering device
US3283957A (en) * 1964-01-27 1966-11-08 Henderson William Dick Liquid proportioning system

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483666A (en) * 1967-01-03 1969-12-16 Olinkraft Inc Filling device
US3913787A (en) * 1971-01-12 1975-10-21 Lawrence Dilger Metering system and control therefor
US4191184A (en) * 1977-01-06 1980-03-04 Carlisle Jeffrey A Intravenous infusion regulation system with reciprocal metering means
US4386716A (en) * 1978-02-23 1983-06-07 Becton Dickinson And Company Liquid measuring device
US4279360A (en) * 1978-02-25 1981-07-21 Wilhelm Hedrich Vakuumanlagen Gmbh & Co. K.G. System for feeding two synthetic-resin components to a mold
US4369805A (en) * 1978-11-15 1983-01-25 Amiad Mutzarei Yiul Liquid metering injector assembly
US4966306A (en) * 1986-07-18 1990-10-30 The Coca-Cola Company Beverage dispenser system using volumetric ratio control device
US20050133304A1 (en) * 1991-10-23 2005-06-23 Viken James P. Fluid exchange system for vehicles
US6378657B2 (en) 1991-10-23 2002-04-30 James P. Viken Fluid exchange system
US6779633B2 (en) 1991-10-23 2004-08-24 James P. Viken Complete fluid exchange system for automatic transmissions
US5381926A (en) * 1992-06-05 1995-01-17 The Coca-Cola Company Beverage dispensing value and method
US5361870A (en) * 1993-09-13 1994-11-08 Courcy Richard R Transmission fluid exchange apparatus
US5871068A (en) * 1994-10-18 1999-02-16 Selby; Theodore W. Device for precise replacement of liquids, before, during, or after operation of a mechanism with method of use thereof
US6019196A (en) * 1995-10-10 2000-02-01 Theodore W. Selby Bag-containing device for precise replacement of liquid before, during, or after operation of a mechanism, and method of its use
US5992696A (en) * 1998-02-24 1999-11-30 Sealant Equipment & Engineering, Inc. Manifold for a metering cylinder
US6435307B2 (en) 1998-07-09 2002-08-20 Theodore W. Selby Precise replacement of liquids and components in a liquid mixture
US6296153B1 (en) * 1999-10-06 2001-10-02 S.O.B. Partnership Self-contained high pressure pneumatic beverage dispensing system
US20050036896A1 (en) * 2003-08-15 2005-02-17 Navarro Ramon M. Sanitary pump and sanitary valve
US7074020B2 (en) 2003-08-15 2006-07-11 Cott Technologies, Inc. Sanitary pump and sanitary valve
US10125002B2 (en) * 2014-07-13 2018-11-13 Sestra Systems, Inc Beverage dispensing system
US20170096322A1 (en) * 2014-07-13 2017-04-06 Lev Volftsun Beverage Dispensing System
US20160257549A1 (en) * 2014-07-13 2016-09-08 Lev Volftsun Beverage Dispensing System
US10294092B2 (en) * 2014-07-13 2019-05-21 Sestra Systems, Inc. Beverage dispensing system
US11124406B1 (en) * 2014-07-13 2021-09-21 Sestra Systems, Inc. System and method for piston detection in a metering mechanism for use with beverage dispensing system
AU2016247900B2 (en) * 2014-07-13 2021-10-07 Sestra Systems, Inc. Beverage dispensing system
US10167183B1 (en) * 2015-04-14 2019-01-01 Sestra Systems, Inc System and method for beverage dispensing
CN107531475A (zh) * 2015-04-15 2018-01-02 谢斯特拉河系统有限公司 饮料分配系统
CN107531475B (zh) * 2015-04-15 2020-10-23 谢斯特拉河系统有限公司 饮料分配系统
US11192770B1 (en) * 2015-04-15 2021-12-07 Sestra Systems Self serve beverage by the glass
US11378433B2 (en) * 2015-04-15 2022-07-05 Sestra Systems Inc Manifold style metering mechanism for use with beverage dispensing system
US11673787B1 (en) * 2015-04-15 2023-06-13 Sestra Systems Inc Empty keg detection for carbonated beverages

Also Published As

Publication number Publication date
DE1217232B (de) 1966-05-18

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