System Fluid Used In Seal Or In Valve Or Lift Operation Patents (Class 141/46)
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Patent number: 4881578Abstract: A combined filler neck and vapor vent line valve is provided by inner and outer pipes that are maintained in concentric relation by a sleeve tightly inserted between the outer pipe and an out-turned flange at the end of the inner pipe. This provides a convenient path out of the fuel tank for displaced tank vapors. Vapor control is provided by a stepped cylindrical valve body that rides up and down within the upper end of the inner pipe and the sleeve so that a seal on the outside of the valve body can cover and uncover openings in the flange to block and un-block a vapor path to the canister.Type: GrantFiled: November 2, 1988Date of Patent: November 21, 1989Assignee: General Motors CorporationInventors: Gregory E. Rich, Roy A. Giacomazzi, Jack C. Wilds
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Patent number: 4832093Abstract: An automatic container filling apparatus for continuously filling a moving line of containers with a fluent material is disclosed. The flow of material to any container is controlled by a single supply of air at a predetermined pressure above atmospheric pressure. The apparatus includes a product filling head having an outlet nozzle arranged to extend into the mouth of a container to be filled. An air supply provides regulated air at a predetermined high pressure. There is also provided a control for receiving and directing the high pressure air to the other components of the apparatus. A sensor tube is adapted to be positioned at a fixed point within the container to be filled. Air from the controller is directed through the sensor tube during the filling of the container. An actuator valve and an interface valve both communicate with the control to receive the high pressure air therefrom.Type: GrantFiled: December 21, 1987Date of Patent: May 23, 1989Inventor: Joseph F. Morrone
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Patent number: 4827987Abstract: A device for mounting in a fuel dispensing hose that has a flexible inner tube defining the fuel conduit, and a tubular outer sleeve that defines with the inner tube an annular vapor return passage. The device includes an aspirating block adapted for serial connection with the inner tube within the outer sleeve. The section comprises a cylindrical block that is connected in series with ends of the inner tube and defines a venturi or jet pump forming part of the fuel conduit. The block also includes bypass passages for fuel to bypass the venturi and to increase the fuel flow through the block. The aspirating block also has radial aspirator ports which communicate between the venturi throat or jet pump and the annular vapor return passage. Each radial aspirating port includes a check valve to permit only one-way fuel flow from the fuel conduit to the vapor passage.Type: GrantFiled: January 13, 1987Date of Patent: May 9, 1989Assignee: Tokheim CorporationInventor: Warren P. Faeth
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Patent number: 4793395Abstract: A tire shock absorber for attachment to a pneumatic tube tire or pneumatic tubeless tire for improving the smoothness of ride and decreasing road vibrations, the tire shock absorber comprising a chamber having at least one valve means which permits the unrestricted flow of air from the tubeless tire or tube tire into the chamber when the tire is subjected to intermittent road pressure, the valve means permitting the return of the displaced air to the tubeless tire or tube tire subsequent to the tire being subjected to the intermittent pressure. The tire shock absorber is designed for positioning either exterior to the tire or interior to the tire depending upon whether or not it is a tube tire or a tubeless tire.Type: GrantFiled: December 4, 1986Date of Patent: December 27, 1988Inventor: Donald E. Mahan
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Patent number: 4790349Abstract: An apparatus is provided for controlling discharge of fuel vapor from the fuel tank having a filler neck during refueling. The apparatus includes a passage for conducting fuel vapor between the fuel tank and a distal portion of the filler neck and a valve for selectively blocking flow of fuel vapor through the conducting means. The valve is operable between a flow-blocking position and a flow-delivery position. A spring yieldably biases the blocking means away from its flow-blocking position to a flow-delivery position. An assembly defining a venting control chamber in communication with the valve is provided for using liquid fuel in the fuel tank to develop a pressure head in the venting control chamber having a magnitude in excess of a predetermined threshold level to exert a closing force on the valve in opposition to the spring so that the valve is moved to its flow-blocking position, thereby preventing discharge of pressurized fuel vapor in the tank to the filler neck through the passage.Type: GrantFiled: April 4, 1988Date of Patent: December 13, 1988Assignee: Stant Inc.Inventor: Robert S. Harris
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Patent number: 4787427Abstract: A filling apparatus operating by counterpressure and intended for use on bottling or filling machines for a barrel 1 equipped with an electric sensor 2 for controlling the fill level of the containers, and connected to a solenoid valve E and supply tank B filled with liquid under gaseous pressure, as well as to a detector P that senses the proximity of the container C to be filled. Barrel 1 of filling apparatus A contains a chamber 11 which, when no container C is being applied against the filling apparatus, is divided by two flexible membranes 5, 6-72 into three successive annular chambers 69, 70, 71 separated by the dividing walls 58, 62-621 of the two membranes 5, 6-72.Type: GrantFiled: January 13, 1987Date of Patent: November 29, 1988Assignee: Societe Dite: SEVAInventors: Marcel Bacroix, Claude Toubhans
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Patent number: 4787428Abstract: Liquid from a supply tank B flows into a container C via outer and central annular chambers 14, 8 of filling apparatus A. Communication between the chambers is controlled by a flexible diaphragm 5 selectively urged against an annular seat 15 on a wall 10 separating the chambers in response to air pressure supplied to a chamber 23 on an opposite side of the diaphragm.Type: GrantFiled: July 21, 1987Date of Patent: November 29, 1988Assignee: SevaInventors: Marcel Bacroix, Claude Toubhans
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Patent number: 4773797Abstract: A device for loading containers that are open or can be vented, containers for fine particulate materials, said device being part of a pneumatic conveyance system, in particular such a system using dense layer transportation, where the said device comprises essentially a tube-shaped casing, a lifting element, a closing element and a lifting rod which connects the lifting and closing elements and enables the distance between these elements to be varied. The combined weight of the part of the lifting element, that can be moved in the axial direction (A), the closing element and the lifting rod is greater than the elastic force of the lifting element but is smaller than the product of the difference between areas (F.sub.H) and (F.sub.M) and the positive pressure in the supply line acting on the lifting element. The distance (h) of the closing element from the lower edge of the casing is smaller than the stroke of the lifting element.Type: GrantFiled: October 17, 1986Date of Patent: September 27, 1988Assignee: Swiss Aluminium Ltd.Inventor: Walter Merz
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Patent number: 4768566Abstract: A fuel tank comprising a fuel inlet pipe. A fuel pump nozzle is inserted into the fuel inlet pipe. A throat portion having a venturi shaped cross-section is arranged in the fuel inlet pipe between the interior space of the fuel tank and the tip of the fuel pump nozzle inserted into the fuel inlet port. Fuel spouted from the fuel pump nozzle passes through the entire cross-section of the throat portion.Type: GrantFiled: February 18, 1987Date of Patent: September 6, 1988Assignee: Toyota Jidosha Kabushiki KaishaInventors: Takaaki Ito, Koji Uranishi
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Patent number: 4762156Abstract: An on board refueling vapor recovery system employs a recirculation line and a regulating valve to prevent the entrainment of atmospheric air into the fuel, without the use of a tight or rubbing seal around the fuel nozzle.Type: GrantFiled: July 16, 1987Date of Patent: August 9, 1988Assignee: General Motors CorporatonInventor: Gregory E. Rich
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Patent number: 4750533Abstract: A filling valve for filling cans with pressurized fluid and a sealing device in combination with the valve. The sealing device includes a flexible member. The flexible member will expand into sealed engagement with the cans when the pressurized fluid is dispensed into the cans.Type: GrantFiled: December 10, 1985Date of Patent: June 14, 1988Assignee: Crown Cork & Seal Company, Inc.Inventor: Chung J. Yun
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Patent number: 4700861Abstract: A container lid for liquid transfer having a double-tapered liquid transfer sleeve for providing an air-tight seal around a fluid transfer conduit and having an air passage part.Type: GrantFiled: September 10, 1986Date of Patent: October 20, 1987Inventor: Theodore C. Neward
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Patent number: 4688608Abstract: A filling valve mechanism for cans is presented. The valve includes a sleeve slidably mounted on a pair of pins and limited in downward motion by means of a stop. The sleeve carries an O-ring circumferentially thereabout for engaging within the throat of a container or can to be filled. The O-ring is of slightly greater diameter than the throat of the can such that sealing engagement is achieved. Also carried on the sleeve is a resilient compressible stripping member adapted for engaging the mouth of the can. The stripping member compresses against the mouth of the can, short of full compression by virtue of the limited downward movement of the sleeve against the stop. After the can is filled, the stripping member urges the O-ring from the throat of the can while holding the can in place.Type: GrantFiled: April 21, 1986Date of Patent: August 25, 1987Assignee: Figgie International, Inc.Inventors: Stanley J. Puskarz, Herbert S. Shalit, Shiva S. Singh
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Patent number: 4678017Abstract: A modular tire valve assembly (11) for a central tire inflation system (10) comprising a valve body (212) having only a first (66) and a second (72) fluid connection from the exterior to the interior thereof is provided. The first fluid connection comprises a first port connected to a selectively pressurized and exhausted conduit (52) and the second fluid connection comprises a second port connected to the interior pressurized chamber (74) of an inflatable tire (12). The assembly includes first valve means (220) responsive to pressurization and exhausting of said selectively pressurized and exhausted conduit to establish or block, respectively, fluid communication between said first and second ports and second valve means (280) responsive to pressurization in said interior tire chamber to maintain said first valve means in the closed position thereof if said interior tire chamber is pressurized below a predetermined reference pressure.Type: GrantFiled: July 1, 1985Date of Patent: July 7, 1987Assignee: Eaton CorporationInventor: Gary R. Schultz
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Patent number: 4653551Abstract: In a filling machine for filling liquid into containers, such as bottles or the like, the lower end of a return gas tube inserted into the container determines the filling height. Rapid adjustment of the position of the lower end of the return gas tube can be provided when different sized containers are used in the filling machine. Two different adjustment devices are used, one for the movement of the return gas tube with a centering device which holds the container during the filling operation and another one for producing precise adjustment of the lower end of the return gas tube with respect to the desired filling height and with such movement being relative to the centering device in the container holding position.Type: GrantFiled: December 20, 1985Date of Patent: March 31, 1987Assignee: Holstein Und Kappert GmbHInventor: Siegmar Sindermann
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Patent number: 4646794Abstract: A refueling system is characterized by the delivery of fuel through a multi-stage telescoping cylinder assembly which uses the fuel as the pressure media for extending and retracting the cylinder assembly. Provision also is made for rotating or pivoting the cylinder assembly about two orthogonal axes which, when combined with telescopic extension and retraction of the cylinder assembly, enables a normally closed nozzle connected to the forward end of the innermost piston cylinder to be positionally directed to the fuel inlet portion of the combat vehicle to be refueled. Another attribute of the system is that when properly seated in the fuel inlet port, the nozzle automatically opens.Type: GrantFiled: August 8, 1985Date of Patent: March 3, 1987Assignee: Universal Hydraulics, Inc.Inventors: Nikolay K. Padarev, Dennis W. Simpson
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Patent number: 4610282Abstract: A portable machine for carbonating liquid contained in a bottle is adapted to support the bottle (5) by the neck (81) through a bayonet connection and for a seal (64) which closes the bottle neck to be driven into engagement with the bottle neck by a piston (60) actuated by the first burst of gas supplied to the injection nozzle (66). The bottle is loaded into the machine through a front opening (6) and a cover (7) for closing the opening is interlocked with a gas supply valve (12) so that gas can only be delivered to the nozzle (66) when the cover is closed. The cover is opened and closed by rotating a knob (23) which is depressed to open the gas valve. The knob (23) is coupled to the gas valve (12) through a device (27) which prevents the valve being opened if the machine is tilted at more than a given angle to the upright position.Type: GrantFiled: November 27, 1984Date of Patent: September 9, 1986Assignee: Sodastream LimitedInventors: Graham L. Brooks, Antony F. Pateman, Michael A. Thomson, John Scott
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Patent number: 4574720Abstract: Bags having a filling valve sleeve which are adapted for containing pulverulent material are filled by inserting a filler nozzle into the sleeve and blowing the material through the nozzle and then through an entry port in the sleeve into the bags. The filler nozzle has a transversely flattened configuration which conforms to the shape of the valve sleeve. The valve sleeve has an inner end which is closed and formed devoid of deep corners and the filler nozzle has a nose portion which is formed so as to conform in profile to the inner end of the sleeve. The entry port of the sleeve is disposed in the bottom wall thereof and the filler nozzle has a delivery port in its bottom wall which registers with the sleeve entry port. The valve sleeve has an inner plastic film lining, and the filler nozzle has a groove which surrounds the nozzle delivery port to which groove a vacuum is applied so as to draw the plastic lining into sealing engagement with the filler nozzle.Type: GrantFiled: September 6, 1984Date of Patent: March 11, 1986Assignee: Champion International CorporationInventor: J. George Lepisto
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Patent number: 4570691Abstract: A vehicle wheel-tire assembly wherein the tire has a low inflation pressure (large tire footprint) in a low vehicle speed range, and a large inflation pressure (small tire footprint) in a high vehicle speed range. The tire is partitioned into a series of circumferential compartments, with each compartment being provided with a valve mechanism for introducing air into the compartment and/or withdrawing air from the compartment as needed to maintain desired inflation pressures in the different vehicle speed ranges. The system is contained entirely in the wheel-tire assembly; no external air compressors or control valves are utilized.Type: GrantFiled: May 3, 1984Date of Patent: February 18, 1986Inventor: Donald G. Martus
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Patent number: 4540144Abstract: The telescoping member of an aerial refueling probe is hydraulically actuated for extension/retraction by pressurized fuel. The force for extending the probe is the result of fuel pressure against a check valve in the end of the telescoping member. The force for retraction is the result of fuel pressure in a retraction chamber between the telescoping member and the inner fixed member of the probe wherein the separating force generated therein retracts the telescoping member. A housing is provided to isolate the probe from the environment and to reduce the frictional forces that resist the telescoping motion. A system for locking the telescoping member in its retracted position and in its extended position is also provided. The telescoping member and the housing may be composite graphite/epoxy.Type: GrantFiled: January 5, 1984Date of Patent: September 10, 1985Assignee: United Technologies CorporationInventor: Andrew P. Perrella
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Patent number: 4509568Abstract: A granular material processing apparatus provided with an improved sealing arrangement for the granular material, which is so arranged that, instead of employing an ordinary packing member conventionally used for a known sealing arrangement, a packing portion is formed by the granular material itself present in the processing apparatus for tightly closing the gaps or clearances between stationary container members and movable processing members, thereby to completely eliminate troubles, spilling of the granular material and mixing of foreign matters into the granular material arising from abrasion or deterioration of a packing member, if such packing member should be employed.Type: GrantFiled: June 8, 1983Date of Patent: April 9, 1985Assignee: Takeda Chemical Industries, Ltd.Inventors: Toshihiro Kawaguchi, Mineo Ishizaka, Hiyoshi Doi
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Patent number: 4498515Abstract: An onboard tire inflation system (10) for controlling and/or monitoring the inflation pressure of a tire (18) from a remote control (22, 24) is provided. The system includes automatic valve means (32, 88) for isolating the interior chamber (20) of the tire and relieving fluid pressure on the rotary seals (78, 80, 82) during system steady state ("off") operating conditions.Type: GrantFiled: October 3, 1983Date of Patent: February 12, 1985Assignee: Eaton CorporationInventors: Joseph C. Holtzhauser, Dale L. Kwasniewski
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Patent number: 4442873Abstract: An improved liquid filling valve for filling containers with carbonated liquid such as soft drinks is disclosed which features concentric valves for introduction of counterpressure gas and product into the container. The container is moved into sealing engagement with the valve which movement is continued to open the valve for admission of counterpressure gas. After counterpressurization is completed the valve for admission of product opens automatically allowing product to fill the container. After filling is completed, motion of the container away from the valve automatically closes it. In the bottle filling embodiment, motion of the bottle away from the valve additionally uncovers a snift port. The counterpressure filling and snifting of containers with carbonated liquids is thus accomplished without use of external valve operating cams or the like.Type: GrantFiled: November 27, 1981Date of Patent: April 17, 1984Assignee: Crown Cork & Seal Company, Inc.Inventor: Chung J. Yun
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Patent number: 4437504Abstract: A tire-pressure regulating system for motor vehicles is proposed, in which a tire-pressure control valve is provided on each vehicle wheel to be monitored.The control valve has a valve seat attached to the housing and a closing body arranged to cooperate with this valve seat. The closing body is disposed on a working surface in such a way that a seat valve controlled by working surfaces is created. The control valve is adjustable in accordance with differential pressure with the aid of a throttle valve means. In this way the differential pressure can be established by the tire pressure being directed at that time. Below a minimum permissible filling pressure, the control valve is closed.The tire-pressure regulating system is preferably applicable to trucks and trailer trucks such as semitrailers to which frequently is attached another wheeled cargo carrier.Type: GrantFiled: March 4, 1982Date of Patent: March 20, 1984Assignee: Robert Bosch GmbHInventor: Werner Stumpe
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Patent number: 4421151Abstract: A tire-pressure regulating system is proposed with which the air pressure in the vehicle tires can be varied while driving. The tires are connected to supply lines in which rotor connections, control valves, flow restrictive elements and an adjustable regulating valve are disposed. A relay valve and an axle valve are incorporated following the regulating valve.By means of guiding the supply line in and at the axle valve in a particular manner, an acceleration of the pressure equalization process is attained.The tire-pressure regulating device is preferably usable in trucks and trailer trucks.Type: GrantFiled: March 4, 1982Date of Patent: December 20, 1983Assignee: Robert Bosch GmbHInventor: Werner Stumpe
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Patent number: 4349055Abstract: A filling valve for filling a container from a pressurized liquid filled bowl is disclosed. The filling valve includes a housing with a liquid filling orifice through it and a liquid flow valve for opening and closing that orifice. A gas flow tube extends through the liquid flow valve element and projects both above and below it. A pressure responsive piston is supported on the gas flow tube. A cover is located over the gas flow opening at the top of the gas flow tube and includes a closure element ball. A sleeve supports the closure element above the top opening of the tube. A spring holds the closure element off the top opening of the tube. A guide sleeve outside the supporting sleeve is connected with the gas flow tube. A spring biases the supporting sleeve out of the guide sleeve.Type: GrantFiled: January 13, 1981Date of Patent: September 14, 1982Inventor: Anthony J. DiChiara
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Patent number: 4299091Abstract: A portable cryogenic liquid storage-gas supply system including an evacuable double-walled cryogenic liquid container being invertible between a top-up dispensing and bottom-up filling positions wherein the container comprises a liquid withdrawal-gas vent tube terminating within the container near the bottom end, a gas vent-liquid fill tube positioned within and penetrating the wall of the liquid withdrawal-gas vent tube and terminating within the container near the top end, and a splash deflector within the container for redirecting a fluid discharged from the gas vent-liquid fill tube toward the container top end during liquid fill of the container.Type: GrantFiled: October 8, 1980Date of Patent: November 10, 1981Assignee: Union Carbide CorporationInventors: William J. Carter, Lester K. Eigenbrod
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Patent number: 4213488Abstract: A valve means for a fuel dispensing nozzle located in the nozzle discharge spout at the outlet end thereof for sealing the outlet end to prevent the flow of fuel and fuel vapors out of the discharge spout when the nozzle vapor-seal valve is closed. The valve means is responsive to the operation of the vapor-seal valve so that when the vapor-seal valve is closed when the nozzle is not in use, the valve means is closed and so that when the vapor-seal valve is open when the discharge spout is operatively inserted into a fill pipe of a fuel tank, the valve means is open. To this purpose, means are provided to establish communication between the valve means and the flow passage upstream of the nozzle flow control valve and between the valve means and the flow passage in the discharge spout. In one embodiment, the valve means located in the discharge spout at the outlet end thereof is a pinch valve, and in another embodiment, the valve means is a wafer valve.Type: GrantFiled: December 4, 1978Date of Patent: July 22, 1980Assignee: Chevron Research CompanyInventor: Walter R. Pyle
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Patent number: 4201558Abstract: A method and apparatus for preparing and dispensing a semi-frozen food product containing liquid and gaseous ingredients including a refrigerated freezing chamber and volumetric type gas and liquid pumps operable when driven to pump gas and liquid in preselected proportions and under pressure to the freezing chamber. The gas and liquid pumps are motor driven under the control of a pressure responsive control which starts the pumps when the pressure in the freezing chamber falls below a predetermined super-atmospheric pressure range and stops the pumps when it rises above that predetermined super-atmospheric pressure range.Type: GrantFiled: December 1, 1978Date of Patent: May 6, 1980Assignee: Beatrice Foods Co.Inventors: Stephen W. Schwitters, Preston L. Aylesworth
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Patent number: 4098308Abstract: The present invention is a fuel dispensing nozzle having an expanding rubber annulus that seals on the inside of a tank filler neck. The seal uses fuel pressure to expand and contract, thereby requiring little operator attention to effect vapor recovery during fuel loading.Type: GrantFiled: June 7, 1976Date of Patent: July 4, 1978Assignee: The Standard Oil CompanyInventor: Charles R. Purdum
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Patent number: 4095626Abstract: Vapors displaced from a volatile liquid container, such as a vehicle's fuel tank, during refilling of the container are recovered by a system employing a liquid jet gas pump to produce a suction in a vapor removal conduit. The liquid jet gas pump draws the vapors through the vapor conduit at a velocity which is sufficient to remove any liquids in the conduit, thereby preventing blockage of the conduit. Valving arrangements in the liquid jet gas pump make the system compatible with leak detection devices and regulate the vacuum in the vapor conduit to a predetermined maximum.Type: GrantFiled: June 21, 1977Date of Patent: June 20, 1978Inventor: James W. Healy
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Patent number: 4090526Abstract: A gas pressure stabilizer system and valve are disclosed for use with beverage bottle filling apparatus and the like. Gas flow from a pressurized source to a filler bowl is permitted along a conduit, but reverse flow, caused by filler bowl gas pressure fluctuation, is prohibited by a check valve. Rather, a rise in filler bowl gas pressure forces a diaphragm in a stabilizer valve to move away from and uncover a relief port. This port opening permits excessive gas pressure to be vented. Long system service life is encouraged by forming the diaphragm of several membranes.Type: GrantFiled: August 16, 1976Date of Patent: May 23, 1978Assignee: Mojonnier Bros. Co.Inventors: Chester J. Witt, Richard M. Thompson
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Patent number: 4062384Abstract: The disclosure is of a gasoline-dispensing nozzle converted, by an adapter, from a conventional configuration to a vapor recovery type.Type: GrantFiled: July 2, 1976Date of Patent: December 13, 1977Assignee: Ames CompanyInventors: Bradley K. Frahm, William E. Watson
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Patent number: 4044793Abstract: A relief valve having a main passage normally closed with a main valve member and a vent passage normally closed with a vent valve member, the vent valve member being constructed to open the vent passage upon application of a predetermined pressure into the main valve passage to thereby prevent application of greater than said predetermined pressure to the outlet of the valve is disclosed.Type: GrantFiled: August 25, 1975Date of Patent: August 30, 1977Assignee: Shiley Laboratories, Inc.Inventors: Kenneth Keith Krueger, Todor Pavlov
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Patent number: 4020861Abstract: A flow control valve particularly useful for a vapor recovery system of a gasoline station. Gasoline and gasoline vapor flow through separate passages in the valve. A restriction (venturi) is provided in the gasoline passage so that a pressure differential will be produced in the passage as a function of the rate of flow of gasoline passing therethrough. A first diaphragm carrying a valve element which controls the flow of fluid through the vapor passage is responsive to said pressure differential so that the flow rate of vapor passing through the valve will be proportional to the flow rate of gasoline. In each of two alternative embodiments, another diaphragm responsive to gasoline pressure is ganged to the valve to compensate for gasoline pressure variations. In a further embodiment, the vapor control valve operates in an "on-off" mode so that a maximum vapor "draw back" is effected whenever gasoline flow of any magnitude is extant.Type: GrantFiled: August 20, 1975Date of Patent: May 3, 1977Assignee: International Telephone and Telegraph CorporationInventor: Marwan S. Shihabi
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Patent number: 3994322Abstract: The escape of fuel vapors from gasline storge tanks during refueling results in significant air pollution and loss of high octane components of the fuel mixture. Presently available systems all take the approach of drawing these vapors from the auto during refueling, through expensive underground plumbing at each service station and then condensing or absorbing these vapors in one large condensing or absorbing unit. This invention, using replaceable cannisters (containing sufficiently cold contact surfaces for condensing the gasoline vapors at the hand dispenser), uses a pressure drop created by the flowing liquid gasoline to return the vapors condensed in the replaceable cannisters back to the consumers' autos or other vehicles. Thus, considerable savings in construction costs of underground service station plumbing is realized in addition to giving the consumer the (high octane) vapors for which he has already paid.Type: GrantFiled: January 10, 1974Date of Patent: November 30, 1976Inventor: Milton P. Overall
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Patent number: 3981334Abstract: A liquid dispensing and vapor recovery system in which a control unit is connected to a storage tank for the liquid and directs the liquid to a pair of conduits which pass the liquid to a receptacle and back to the storage tank, respectively. A reduced pressure zone is established in the conduit connected to the storage tank and is in communication with the receptacle for drawing vapors from the receptacle for passage back to the storage tank. The control unit prevents the flow of liquid back to the storage tank until gasoline is delivered to the receptacle and modulates the vapor flow back to the storage tank in response to the flow through the conduit connected to the receptacle.Type: GrantFiled: April 4, 1975Date of Patent: September 21, 1976Assignee: Weil-McLain Co., Inc.Inventor: Elmer M. Deters
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Patent number: 3981335Abstract: A liquid dispensing and vapor recovery system in which an underground storage tank is connected to a first conduit for delivering a liquid, such as gasoline, to a vehicle gasoline tank or the like under the force of a pump located in the storage tank. A second conduit is connected to the first conduit and to the storage tank for diverting a portion of the gasoline in the first conduit back to the storage tank and an injector is located in the second conduit for forming a reduced pressure zone in response to gasoline flow through the second conduit. A valve unit prevents the flow of gasoline through the second conduit until gasoline is delivered to the vehicle gasoline tank. A third conduit is connected to the vehicle tank and to the second conduit at the reduced pressure zone for drawing the vapors from the vehicle tank into the second conduit for passage into the storage tank.Type: GrantFiled: March 31, 1975Date of Patent: September 21, 1976Assignee: Weil-McLain Co., Inc.Inventor: Elmer M. Deters
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Patent number: 3952781Abstract: A liquid dispensing and vapor recovery system and a vapor control unit used therein in which the control unit has a pair of inlets for receiving liquid, such as gasoline, from an underground storage tank and for receiving gasoline vapors from a vehicle tank during dispensing of the gasoline into the latter tank. A first passage is provided in the control unit for passing the gasoline from the storage tank to a hose connected to the vehicle tank, and an additional passage is provided in the control unit for diverting a portion of the gasoline. A valve is provided which controls the flow of gasoline through the additional passage in response to the flow of gasoline through the first passage and an injector nozzle is provided in the additional passage for drawing vapors from the vehicle tank and into the second passage for mixing with the gasoline before being discharged back to the storage tank.Type: GrantFiled: January 27, 1975Date of Patent: April 27, 1976Assignee: Weil-McLain Company, Inc.Inventors: Trueman W. Hiller, Klaus D. Jarr
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Patent number: 3941168Abstract: A liquid dispensing and vapor recovery system in which an underground storage tank is connected to a first conduit for delivering a liquid, such as gasoline, to a vehicle gasoline tank or the like under the force of a pump located in the storage tank. A second conduit is connected to the first conduit and to the storage tank for diverting a portion of the gasoline in the first conduit back to the storage tank and an injector is located in the second conduit for forming a reduced pressure zone. A third conduit is connected to the vehicle tank and to the second conduit at the reduced pressure zone for drawing the vapors from the vehicle tank into the second conduit for passage into the storage tank. Valve means are provided which are responsive to the rate of flow of the liquid through the first conduit for regulating the flow of vapor through the third conduit.Type: GrantFiled: December 19, 1974Date of Patent: March 2, 1976Assignee: Weil-McLain Company, Inc.Inventors: Trueman W. Hiller, Klaus D. Jarr