With Discharge Volume Varying Means Patents (Class 222/250)
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Patent number: 11268620Abstract: A channel chip having a channel for running a fluid that is opened and closed by sliding on a film a sliding member slidable on the film while contacting with the film, the channel chip comprising: a substrate including a first channel, a second channel and a partition wall formed between the first channel and the second channel; a film including a diaphragm having a substantially spherical crown shape, the film being disposed on the substrate so that the diaphragm faces the partition wall; and a positioning section for holding the sliding member in such a way that the sliding member is slidable on the film while the positioning section positions the sliding member, the positioning section being disposed on the film.Type: GrantFiled: October 1, 2020Date of Patent: March 8, 2022Assignee: ENPLAS CORPORATIONInventors: Koichi Ono, Nobuya Sunaga
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Patent number: 11192774Abstract: A device for evacuating a container that contains a pasty liquid to avoid air inclusions or bubbles in the liquid while the container is being filled and/or to eliminate air between the liquid surface and a follower plate until the plate contacts the liquid surface during insertion of the plate into the container before removal of the liquid. The device comprises a cover assembly to close an opening of a container in a vacuum-tight manner and which has a connection device for connecting an evacuation pump. A collapse avoidance apparatus is provided to surround at least one region of the outer faces of the container walls with a seal to connect to the wall outer face in a vacuum-tight manner and form a vacuum-tight collapse avoidance chamber. A connection device is provided for connecting an evacuation pump to evacuate the chamber and apply a vacuum on the wall outer face.Type: GrantFiled: March 15, 2018Date of Patent: December 7, 2021Inventor: Udo Tartler
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Patent number: 10913651Abstract: The invention relates to a container emptying device (1) for emptying at least one container (6) filled with a liquid, comprising a suction unit (2), a receiving unit (4) and a pipe unit (3) connecting the receiving unit (4) with the suction unit (2). The suction unit (2) comprises at least one suction lance (2a) adapted to be inserted and lowered into the container (6), at least one pump (2c), connecting the suction lance (2a) with the pipe unit (3), for pumping the liquid out of the container (6) and a control device for controlling a suction process. The pipe unit (3) comprises at least one flexible pipe for transporting the liquid out of the container (6).Type: GrantFiled: September 19, 2016Date of Patent: February 9, 2021Assignee: Tetra Laval Holdings & Finance S.A.Inventors: Thomas Eggler, Franco Acklin, Denis Steffen
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Patent number: 10830362Abstract: This fluid handling device has a substrate, a film, and a sliding member. The substrate has first flow paths, second flow paths, and partition walls formed between one end of the first flow paths and one end of the second flow paths. The film includes a diaphragm, and is arranged above the substrate such that the diaphragm and the partition walls oppose one another. The sliding member has protrusions formed on the back surface thereof, and is arranged above the film with the back surface facing the film. By sliding on the film the sliding member is able switch alternately between a first state in which the protrusions are arranged so as not to oppose the partition walls, and the diaphragm is sandwiched therebetween, and a second state in which the protrusions are arranged opposing the partition walls, and the diaphragm is sandwiched therebetween.Type: GrantFiled: August 3, 2017Date of Patent: November 10, 2020Assignee: ENPLAS CORPORATIONInventors: Koichi Ono, Nobuya Sunaga
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Patent number: 10577239Abstract: A material transfer system for storing, transferring and dispensing viscous material, such as fluids and liquids, includes a material containment vessel with an upper region incorporating a motive force and a bottom region with a material ingress and egress opening. A diconical or other shaped force transfer device is located in the material containment area. The force transfer device is an energy transducer when the material containment is filled with highly viscous materials, such as adhesives, sealants, mastics or lubricating greases. The system's performance can be improved by applying a surface treatment to the wetted surfaces of the system to change the physical properties at the fluid/vessel interface.Type: GrantFiled: January 7, 2019Date of Patent: March 3, 2020Assignee: C.H.&I. Technologies, Inc.Inventors: Robert D. Thibodeau, Eric A. Williams, Lawrence M. Levenstein
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Patent number: 10570789Abstract: A rotary internal combustion engine with a housing having a fluid passage defined therethrough opening into a portion of its inner surface engaging each peripheral or apex seal of the rotor. An injector has an inlet for fluid communication with a pressurized lubricant source and a selectively openable and closable outlet in fluid communication with the fluid passage for delivering the pressurized lubricant to each seal through the fluid passage. A housing for a Wankel engine and a method of lubricating peripheral seals of a rotor in an internal combustion engine are also discussed.Type: GrantFiled: June 17, 2016Date of Patent: February 25, 2020Assignee: Pratt & Whitney Canada Corp.Inventors: Edwin Schulz, Etienne Plamondon, Jean Thomassin
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Patent number: 10221059Abstract: A material transfer system for storing, transferring and dispensing viscous material, such as fluids and liquids, includes a material containment vessel with an upper region incorporating a motive force and a bottom region with a material ingress and egress opening. A diconical or other shaped force transfer device is located in the material containment area. The force transfer device is an energy transducer when the material containment is filled with highly viscous materials, such as adhesives, sealants, mastics or lubricating greases. The system's performance can be improved by applying a surface treatment to the wetted surfaces of the system to change the physical properties at the fluid/vessel interface.Type: GrantFiled: January 29, 2014Date of Patent: March 5, 2019Assignee: CH&I TECHNOLOGIES, INC.Inventors: Robert D. Thibodeau, Eric A. Williams, Lawrence M. Levenstein
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Patent number: 8567209Abstract: A refrigerator is provided. The refrigerator includes a body defining a storage space; a door selectively shielding the storage space; a container connecting part disposed in the storage space or the door; a water supply container separably coupled to the container connecting part, the water supply container including an opening for injecting water; an ice making device for making ice using the water supplied from the water supply container; a water supply passage fluidly connecting the water supply container to the ice making device, the water supply passage extending in an inside direction of the water supply container; and a pump connected to the water supply passage to supply the water within the water supply container into the ice making device. According to the refrigerator, installation cost is reduced, and quality and reliability are improved.Type: GrantFiled: March 3, 2010Date of Patent: October 29, 2013Assignee: LG Electronics Inc.Inventor: Sung Kyoung Kim
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Patent number: 8534505Abstract: Methods and apparatus for dispensing liquid material provide the option to dispense precise and repeatable quantities or volume of material over a wide range of viscosities. In one embodiment, a metering chamber is provided that can be filled and emptied at the same time so as to eliminate time delays between dispensing operations. The material may be under pressure and that pressure is used to fill and empty a metering chamber. In another embodiment, a control device is provided with a metering chamber wherein the control device operates to switch pressurized fluid between two passages to the metering chamber. In a more specific embodiment, the control device may be, for example, a valve, and more specifically in one embodiment a pneumatically actuated spool valve.Type: GrantFiled: August 31, 2009Date of Patent: September 17, 2013Assignee: Nordson CorporationInventors: Mario Romanin, Brian Burkley, Les Varga, Chuck Ganzer, Jeff Owen
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Patent number: 8418647Abstract: A dual action piston type metering device is installed between the color changer of a coating system and its atomizer, the metering cylinder of which includes two input ports with the color changer output ports connected to the atomizer. The dual action piston type metering device enables the alternating operation of the cylinder ranges (A/B-operation) with only one single metering cylinder.Type: GrantFiled: October 20, 2006Date of Patent: April 16, 2013Assignee: Dürr Systems Inc.Inventor: Herbert Martin
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Publication number: 20120298696Abstract: A metering device and method of modular construction allows ease of set up, maintenance and process changes, without the need for changing structures and/or custom parts and without the need for special tools. The metering device monitors various operating parameters with closed loop computer feedback to enhance piston and pump control for accurate metering, to predict when routine maintenance should be performed to avoid failure, to permit automatic fine tuning of displacement during operation and to enhance production within specification tolerances while minimizing downtime. The piston cylinder assembly within the hard tooling can be readily changed to selectively have different diameter cylinders and pistons and to be readily convertible between macro and micro liquid metering. The metering device with its controls and ease of component changes allows metering systems with multiple metering devices to be easily set up with improved synchronization and accurate mixing ratios.Type: ApplicationFiled: May 25, 2012Publication date: November 29, 2012Applicant: Failsafe Metering International Ltd.Inventors: Thomas Kevin Milo, Peter P. Seabase
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Patent number: 8220660Abstract: A system for supplying at least two fluids in proportioned quantities may include a first and second intake passages configured to be in flow communication with sources of first and second fluids, respectively. The system may include a fluid transfer device in flow communication with the first intake passage and the second intake passage, and a pump in flow communication with the first intake passage. Operation of the pump is configured to supply a quantity of the first fluid to a first chamber of the fluid transfer device such that a quantity of the second fluid is expelled from a second chamber of the fluid transfer device. When operation of the pump is ceased, a quantity of the second fluid enters the second chamber and a quantity of the first fluid is expelled from the first chamber.Type: GrantFiled: May 14, 2008Date of Patent: July 17, 2012Inventor: Clyde M. Smith
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Patent number: 8091469Abstract: A beverage machine comprising a drip tray device that can accommodate recipients of different heights. The drip tray device is formed of a collect tank and has a first drip support grid removably mounted on the tank for holding short recipients and has a second drip support for longer recipients such as a glass. The whole device is removable for ease of emptying and rinsing. In a possible mode, the first removable grid is provided with a gutter to evacuate liquid in a main collect reservoir.Type: GrantFiled: June 7, 2006Date of Patent: January 10, 2012Assignee: Nestec S.A.Inventors: Antoine Cahen, Michael Stieger
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Patent number: 7798374Abstract: In a process for producing crosslinkable organopolysiloxane compositions, in particular organopolysiloxane compositions which can be crosslinked at room temperature, the organopolysiloxane compositions are stored in a storage unit before being packed in moisture-proof containers, the storage having a storage capacity of at least 15 minutes of production capacity of the mixture, the essentially dead-space-free storage unit continually having an internal pressure of more than 1200 hPa during filling.Type: GrantFiled: January 8, 2008Date of Patent: September 21, 2010Assignee: Wacker Chemie AGInventors: Peter Schoeley, Guenther Dineiger, Stephan Schulz
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Patent number: 7510103Abstract: To deliver a liquid at high speed and with high accuracy. A device for delivering a fixed quantity of liquid, comprising a pump section for metering the delivered liquid to provide a desired amount consisting of a plunger chamber formed in a cylinder block, and a plunger reciprocating in the plunger chamber, a valve section for switching between liquid flow channels for suction and delivery, a reservoir section for reserving liquid adapted to communicate with the pump section depending upon the position of the valve section, and a delivery section having a delivery port for delivering liquid, the device being characterized in that the pump section and the valve section are disposed connected to each other and that the maximum advance position of the plunger is defined by a plane where the front end surface of the plunger contacts the valve section and pump section. The valve section is removably disposed in the pump section.Type: GrantFiled: June 14, 2002Date of Patent: March 31, 2009Assignee: Musashi Engineering, Inc.Inventor: Kazumasa Ikushima
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Patent number: 7225946Abstract: An improved microprocessor-controlled dual piston-pump viscous fluid dispensing system as for dispensing uniform sealing beads and the like (as well as other types of uniform deposits), wherein the pressure throughout the fluid path is maintained constant including during the switching alternately between filled and emptying pumps of the pair, assuring a constant dispensing rate, including during the switchover of the pumps.Type: GrantFiled: December 11, 2003Date of Patent: June 5, 2007Assignee: DTIC Dispensing Technologiesa a Division of Stainless Steel Coatings, Inc.Inventor: Ivan Gardos
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Patent number: 6886720Abstract: A metering device that includes a housing defining a cylindrical chamber containing a reciprocating shuttle. The two opposed end parts of the chamber are interconnected by fluid flow ducts to a cylindrical valve bore. Contained with the valve is a rotary valve rod driven rotationally by a stepping motor. The valve rod has part cut away to form channels or recesses. In one rotational position of the valve rod a flow path is established from an inlet to one end of the chamber and a separate flow path is established from the other end of the chamber to an outlet. In an alternate orientation of the valve rod a flow path is formed from the inlet to the other end of the chamber and the first end of the chamber is connected to an outlet.Type: GrantFiled: August 18, 2003Date of Patent: May 3, 2005Inventor: Laurence Richard Penn
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Patent number: 6702155Abstract: An apparatus and method of delivering adjustable metered doses of a composition from a squeezable container. An embodiment of the apparatus is a metered dose dispenser including a body that includes an inlet channel with a first opening, an outlet channel with a second opening, and a dosing wheel seat. The dosing wheel seat is a cavity defined by the body. The dosing wheel seat communicates with the inlet channel, via the first opening, and with the outlet channel, via the second opening. The metered dose dispenser also includes a removable, rotatable dosing wheel is situated within the dosing wheel seat when the metered dose dispenser is in use. The dosing wheel includes a dosing channel, which may be aligned with the inlet channel and the outlet channel. A plunger is movably situated in the dosing channel, the plunger does not fit through either the first or second opening.Type: GrantFiled: September 18, 2001Date of Patent: March 9, 2004Assignee: Solvay Pharmaceuticals, Inc.Inventor: Thomas M. Rebne
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Patent number: 6676387Abstract: A metering device contains a rotor which defines elongate chamber, there being a shuttle contained within the chamber movable between two terminal end positions. Frusto-conical surfaces defined on the rotor cooperate with annular members defining corresponding seats. One passage extends from one end of the chamber to one frusto-conical surface, and another passage extends from the other end of the chamber to the other frusto-conical surface. Each annual element defines a respective inlet and outlet for fluid and a shuttle is present within the chamber. As the rotor rotates, the shuttle effects a shuttling movement thus measuring dispensed volumes of fluid. A sensor is provided to detect physical contact of the shuttle with the end of the chamber to cause the rotor to advance.Type: GrantFiled: April 16, 2002Date of Patent: January 13, 2004Inventor: Laurence Richard Penn
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Patent number: 6589483Abstract: A liquid dispenser characterized by a dispensing head which is movable upward and downward as a whole and comprises a plurality of plungers supported by a plunger plate, drive means for moving the plunger plate upward and downward, a plurality of cylinders in which the plungers slidably fit, and a plurality of nozzles arranged at the lower ends of the cylinders and having configurations adapted to engage airtightly with holes for holding specific dispensing tips, the plurality of nozzles being supported by a single nozzle holder, which is built to be detachable from said dispensing head. According to the invention, only the nozzle holder that support nozzles has to be replaced with another holder conforming to dispensing tips of different dimensions. The arrangement facilitates the replacement and make the dispenser available at lower cost.Type: GrantFiled: July 21, 2000Date of Patent: July 8, 2003Assignee: Cosmotec Co., LtdInventor: Yoshio Maeda
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Patent number: 6588929Abstract: A portable mixing and dispensing apparatus, especially useful for spraying, including a fluid conducting, mixing and supporting framework for the hydraulic unit in the apparatus. The framework includes spaced end plates and a conduit assembly. Each end plate has a cylinder head portion forming part of the cylinder of the hydraulic unit, an upper mounting flange, and a lower flange. The conduit assembly includes an intermediate conduit/handle and a pair of end units. The end units are nearly identical and are secured to the end plates so as to constitute unitary structures therewith, releasably connected to opposite ends of the cylinder body of the hydraulic unit and to the intermediate conduit/handle, thereby enabling easy access to the cylinder body and piston in the body. Each end unit includes an outlet conduit and an end conduit.Type: GrantFiled: September 22, 2000Date of Patent: July 8, 2003Inventor: Kelly N. Dornbush
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Patent number: 5944221Abstract: In a hot and cold water distribution system wherein the hot water is delivered from a water heater to a distant hot water tap adjacent a cold water tap, a hot water recirculation pump assembly purges the hot water line of any cooled-down water in order to assure instant hot water delivery when the hot water tap is opened. The volume of water drawn from the hot water line is flushed back through the hot water line by admission of an equal amount of water that was stored within a tank. That volume of water is pumped back into the tank, and automatically replaced by hot water drawn from the water heater.Type: GrantFiled: February 2, 1998Date of Patent: August 31, 1999Inventors: Karsten Andreas Laing, Johannes Nikolaus Laing
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Patent number: 5370112Abstract: Portable gas dispensing systems of the type in which pulsed doses of a respirating gas such as oxygen are supplied to a patient with breathing difficulties are provided with means to generate electricity from energy extracted from the expanding gas rather than relying solely upon batteries for power to operate the system. A pneumatic motor, which may be integral with the system dose metering means, is powered by expanding gas and drives an electrical generator to produce sufficient electricity to at least supplement that required for system operation allowing for an increase in the service time per fill or a decrease in system weight or both.Type: GrantFiled: July 1, 1993Date of Patent: December 6, 1994Assignee: DeVilbiss Health Care, Inc.Inventor: Warren E. Perkins
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Patent number: 5092494Abstract: An apparatus for metering fluid has a casing (1) accommodating a rotor (2) having a closed interior space. The interior space of the rotor (2) is divided by partitions (3) into measuring chambers (4) each accommodating a free piston (5) dividing the measuring chamber into a metering space (6) and a control space (7) located on either side of the piston (5). There is provided a batch controller having a variable capacity chamber (18) communicating with all control spaces which are connected in parallel with one another. Each chamber (4) has a port (10) regularly communicating through a port (8) with a metered fluid supply line and with a port (9) for discharging metered fluid.Type: GrantFiled: April 10, 1990Date of Patent: March 3, 1992Assignee: Tselevoi Nauchno-Tekhnichesky Kooperativ "Stimer"Inventor: Leonid P. Proglyada
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Patent number: 5059398Abstract: A disposable preselected-volume capillary pipet device comprises a capillary tube having an admitting emitting end for liquids and a vent end for passing air from the tube as the liquid is being drawn into the tube by capillary action, a port at the admitting-emitting end for admitting and emitting liquids to the capillary tube, a port at the vent end of the tube for passing air freely from the tube, a barrier plug for passing air and stopping the passage of liquid through the tube, with the barrier plug being positioned in the tube at a preselected distance from the admitting-emitting port to define a liquid chamber of preselected volume, and a plunger for pushing the barrier plug from the vent end to push the preselected volume of liquid out of the liquid chamber. The barrier plug may be mounted in the tube or in the head of the plunger.Type: GrantFiled: July 22, 1985Date of Patent: October 22, 1991Assignee: Drummond Scientific CompanyInventor: James W. Kenney
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Patent number: 4915264Abstract: A portion control apparatus is provided for receiving a food product and discharging the product in portions of predetermined size. This apparatus has a housing with an inlet, an outlet, a first and second chamber and a passageway connecting the inlet, outlet and chambers. The apparatus also includes a valve disposed in the passageway and movable between a first and second position. In the first position, the valve allows communication between the inlet and the first chamber and between the outlet and the second chamber. In the second position, the valve allows communication between the inlet and the second chamber and between the outlet and the first chamber. Two positions mounted in the housing for reciprocating movement and connected by a rod limit the amount of food product which each chamber receives and move the product out of each chamber and out of the apparatus through the outlet in an orderly sequence.Type: GrantFiled: February 24, 1989Date of Patent: April 10, 1990Inventor: David C. Curtis
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Patent number: 4763814Abstract: A fluid feeding device in which a battery, a DC motor and an electric pump are housed within a portable case. A fluid in a fluid container mounted on and communicated with the electric pump is discharged from a fluid discharge gun in a predetermined quantity or continuously. The fluid feeding device is compact in size and light in weight so that an operator can easily carry it in a wide range, whereby the fluid feeding device can be easily used at a high place or at a narrow place. The fluid feeding device is used, for instance, for feeding grease into mechanical bearings or the like.Type: GrantFiled: April 27, 1987Date of Patent: August 16, 1988Assignees: Ishikawajima-Harima Jukogyo Kabushiki Kaisha, Ishikawajima Yuki Kabushiki KaishaInventors: Kenzo Haruyama, Kenichiro Tsuruga, Tadashi Yoshikawa
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Patent number: 4705034Abstract: A device for administering oxygen and other respirating gases to a patient premeters and temporarily stores single dose quantities of respirating gas and dispenses each dose in synchronization with the patients's inspiratory cycle. A sensor produces a signal upon the onset of each inhalation and a single dose of gas is dispensed to the patient in immediate response to the sensor signal.Type: GrantFiled: October 2, 1985Date of Patent: November 10, 1987Inventor: Warren E. Perkins
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Patent number: 4690309Abstract: A self-powered spraying device for dispensing a metered amount or a continuous amount of chemical. A valve is connected through conduits to a cavity in front of a piston, to a cavity in the rear of the piston, to a fluid pressure source and to a nozzle. In the open position of the valve the rear cavity is connected to the fluid pressure source, and the front cavity to the nozzle. In the closed position of the valve the front and rear cavities are connected so that a spring within the front cavity drives the piston to the rear, thereby transferring chemical from the rear cavity to the front cavity. A second valve is also provided which in an opened position permits the metered dispensing of chemical when the first valve is operated and when in a closed position permits the continuous release of chemical when the first valve is operated.Type: GrantFiled: July 3, 1986Date of Patent: September 1, 1987Assignee: The United States of America as represented by the Secretary of AgricultureInventors: Michael A. Wehr, Robert L. Sajdak
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Patent number: 4602249Abstract: A method and apparatus for detecting leaking valves in a volumetric fluid delivery system. The system employs a volumetric chamber divided into two compartments by a moveable membrane, with each compartment having a valved inlet and a valved outlet. In the system, fluid is delivered in discrete increments by alternately opening an inlet and an outlet on opposite sides of the membrane. Between such delivery periods, all valves are closed, and then only a single valve is opened. The membrane is monitored to detect movement while the single valve is opened, indicating a closure failure in one of the supposedly closed valves.Type: GrantFiled: May 21, 1984Date of Patent: July 22, 1986Assignee: Quest Medical, Inc.Inventor: Martyn S. Abbott
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Patent number: 4566491Abstract: Valve 11 includes a slide sliding in a first chamber 26 with the possibil of reaching two stable end positions opposite each other. In the first position the slide 21 allows intercommunication between a conduit 6 for supply of the product from a supply source and conduit 12 communicating with the upper part of chamber 10 of a double acting piston 9, as well as the intercommunication of the other part of chamber 10 with a conduit 15 connected to a delivery apparatus; in the second position the slide allows the reversal of such connections. To avoid the infiltration and mixing of the fluid under pressure used for the control of valve 11 in the conduits in which the product circulates, said slide 21 is equipped with a projection 35 which extends beyond one of the ends of the chamber 26 and is connected to a small pneumatically controlled piston 36, sliding in a second chamber 37, separate from the first.Type: GrantFiled: January 18, 1984Date of Patent: January 28, 1986Assignee: Azionaria Costruzioni Macchine Automatiche - A.C.M.A. - S.p.A.Inventors: Franco Aiuola, Paolo Nipoti
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Patent number: 4518102Abstract: A metering device wherein a cylinder is provided with opposite end closures, a piston is shiftable in the cylinder between the end closures, a conduit extends centrally within the cylinder into a valve plug angularly shiftable within the cylinder and located adjacent to one end closure, the valve plug having angularly spaced passageways communicating respectively with opposite sides of the piston upon angular valve shifting, and a gasket extending in sealing relation about the plug and on opposite sides of the passageways to seal the latter from each other.Type: GrantFiled: February 17, 1983Date of Patent: May 21, 1985Inventor: Dale Tanner
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Patent number: 4386716Abstract: The invention is an improved liquid measuring device which can be used as a proportioner, dispenser or flow meter for a single fluid or for an unlimited number of fluids. The device embodies a free-floating piston sealed within a cylinder capped at both ends, a high-resolution detector system, either optical or electrical, to accurately determine the piston location within the cylinder, and a microprocessor which converts the lateral movement of the piston within the cylinder into volume measurements of the fluid in the cylinder.Type: GrantFiled: February 3, 1981Date of Patent: June 7, 1983Assignee: Becton Dickinson and CompanyInventor: Robert T. Buck
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Patent number: 4369805Abstract: A liquid metering injector assembly for injecting metered quantities of a first liquid into respective metered quantities of a second liquid comprising a metering cylinder, metering ports formed at either end of the metering cylinder; a metering piston displaceable in the metering cylinder; a valve unit having a valve inlet for coupling to a pressurized source of the first liquid; means for coupling the valve to a hydraulic pulse source; a valve outlet for coupling to a source of the second liquid; a pair of communication valve ports of said valve unit respectively communicating with the metering ports and selectively communicatable with the valve inlet and outlet and a displaceable spool valve of the valve unit responsive to the hydraulic pulses so as to be displaceable between two positions in which the respective communication of the valve unit communicating ports with the valve unit inlet and outlet are successively reversed.Type: GrantFiled: January 12, 1981Date of Patent: January 25, 1983Assignee: Amiad Mutzarei YiulInventor: Chanany Tavor
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Patent number: 4340159Abstract: Apportioning control apparatus used principally for metering and dispensing foodstuff, said apparatus including an apportioner housing having an internal bore containing a free-floating piston, and an inlet and outlet port located adjacent both ends of the housing and opening into the bore. Working fluid is contained within the bore on both sides of the piston. Intake and discharge of the working fluid from the bore is controlled by a plurality of switch activated valves, permitting simultaneous intake and discharge. An adjustable piston stop permits precision control of the volume of working fluid flowing to and from the apparatus. The apparatus may include a holding tank for the working fluid, a pump, and a foodstuff dispenser operable to dispense foodstuff in a volume equal to fluid intake from the apportioner.Type: GrantFiled: July 28, 1980Date of Patent: July 20, 1982Inventor: Arthur E. Garrett
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Patent number: 4279360Abstract: A two-component molding system according to this invention has a pair of supplies each containing a quantity of a respective fluid synthetic-resin component capable of reacting and hardening with the other component. Respective conduits having upstream ends connected via pumps to the respective supplies and downstream ends connected via metering devices to a mixing chamber extend from these supplies. Molds are connected to the mixing chamber. A controller connected to the pumps and to the metering devices determines the pumping volume/time rates and compares them with the respective downstream actual volume/time rate at the downstream ends of the conduits. In the event that the actual rates are not substantially identical to the pumping rates, the controller sounds an alarm and shuts down the system.Type: GrantFiled: February 21, 1979Date of Patent: July 21, 1981Assignee: Wilhelm Hedrich Vakuumanlagen GmbH & Co. K.G.Inventor: Erhard Hauser
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Patent number: 4213544Abstract: A device for dispensing a measured volume of liquid such as hot water for a coffee making machine in which the liquid is delivered to and dispensed from a cylinder having a double-acting piston the stroke of which is limited and controlled by an external microswitch which is remotely operated by the piston without physical contact, e.g., magnetically, at a predetermined point in its stroke.Type: GrantFiled: December 26, 1978Date of Patent: July 22, 1980Inventor: Alberto S. Pandolfi
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Patent number: 4162750Abstract: An apparatus for automatically dispensing a measured volume of liquid has a cylinder and a piston. The liquid is fed to one end of the cylinder and displaces the piston which expels from the other end of the cylinder a quantity of liquid proportional to the piston stroke. At the end of the stroke, the piston abuts and closes a switch which actuates an electric motor driving a four-way rotary valve to reverse the liquid flow direction in the cylinder, whereby the piston moves in the opposite direction to discharge a measured amount of the liquid which was previously used to push the piston. The piston, at the end of its second stroke, again strikes and causes the closing of a second electric switch which produces rotation of the four-way valve to again reverse the liquid flow to its original direction.Type: GrantFiled: September 19, 1977Date of Patent: July 31, 1979Inventors: Normand Demers, Claude Martin
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Patent number: 4044924Abstract: An adjustable progressive distributor valve for the intermittent metered distribution of lubricant to a plurality of branch lines by means of several free valve plungers reciprocating inside the main bores of several adjoining valve segments, the effective volume of each metering chamber being adjustable by means of a metering plunger and an adjustable drag connection between the latter and the valve plunger, so that the two plungers act as differential pistons over an adjustable length portion of the fixed valve plunger stroke.Type: GrantFiled: July 28, 1975Date of Patent: August 30, 1977Assignee: De Limon Fluhme & Co.Inventor: Horst Saretzky