With External Means For Opposing Bias Patents (Class 137/522)
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Patent number: 5642753Abstract: A plate mounted to a reciprocable shaft has a plurality of straight fingers (a) coupled thereto and (b) extending perpendicularly therefrom, and each of the fingers is separately detachable from the plate to simplify and facilitate maintenance and repair. Further, the fingers are identical, whereby manufacturing and stocking requirements are minimized.Type: GrantFiled: July 1, 1996Date of Patent: July 1, 1997Assignee: Dresser-Rand CompanyInventors: Ethan P. Thistle, Michael A. DeCerbo, John R. Metcalf
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Patent number: 5634492Abstract: A valve lifter for compressor valves includes a carrier, and a plurality of fingers secured thereto, the fingers including a retaining element co-operating with the carrier so as to provide a positive fit. At least one retaining element incorporates a positioning element that established its position relative to the carrier, and a fixing element that snaps into position in the installation position on the carrier. It is preferred that the fingers be of long glass fiber reinforced polyamide, which permits a simple and secure connection of the fingers to the carrier that does not settle.Type: GrantFiled: May 5, 1995Date of Patent: June 3, 1997Assignee: Hoerbiger Ventilwerke AktiengesellschaftInventors: Peter Steinruck, Peter Rochowansky, Karl Rein
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Patent number: 5628550Abstract: An anti-lock hydraulic brake system comprising a master cylinder and a wheel brake, with a flow control valve being inserted into the brake line. A non-return valve is inserted into the brake line. A direct connection is established between the wheel brake and the master cylinder, with a non-return valve opening towards the master cylinder. A pump supplies fluid into the brake line between the non-return valve and the flow control valve. A high-pressure accumulator is provided on the pressure side of the pump.Type: GrantFiled: June 22, 1995Date of Patent: May 13, 1997Assignee: Itt Automotive Europe GmbHInventors: Dalibor Zaviska, Peter Volz
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Patent number: 5611646Abstract: A compact support prop having a pressure limiting valve with a very high flow volume forming a prop head as a valve housing. The pressure limiting valve is integrated into the prop head. Thus, insertion speeds of more than 3 meters per second can be achieved. The drawing and filling valve consists of one or possibly two pilot-controlled check valves which can be easily attached to an outer side of the internal prop. It allows for a quick setting and drawing after removal of the released pressure medium. The released pressure medium flows off via the connection of the pilot-controlled check valve. The connection is provided as a setting gun connection and the released pressure medium can be returned to the inside by this connection.Type: GrantFiled: March 15, 1995Date of Patent: March 18, 1997Assignee: Richard Voss Grubenausbau GmbHInventor: Richard Voss
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Patent number: 5592967Abstract: In a hydraulic device including at least two actuators both adapted to be operated by a single pump, one of the actuators having priority over the other actuator, a control valve for the one actuator including a load hold check valve adapted to assign a variable priority function to the one actuator over the other actuator, the load hold check valve including a valve body provided with a pair of ports respectively communicating with the actuators and a parallel fluid passage communicating with the pump, the parallel fluid passage also communicating with a selected actuator port in an opened state thereof, a poppet disposed in the valve body and adapted to fully open the parallel fluid passage at a full stroke thereof and partially opening the parallel fluid passage at a limited stroke thereof, and a pressure setting spring adapted to always urge the poppet toward the initial position for closing the parallel fluid passage.Type: GrantFiled: June 30, 1995Date of Patent: January 14, 1997Assignee: Samsung Heavy Industries Co., Ltd.Inventor: Hyung J. Cho
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Patent number: 5568910Abstract: An anesthesia machine includes a breathing system for delivering a gas mixture, including an anesthetic gas, to a patient for inhalation and for collecting exhaled gas from the patient. A cannister flow communicates with the breathing system and removes carbon dioxide from the exhaled gas. A pressure relief valve includes a housing that defines a chamber in flow communication with the breathing system, a valve member for regulating a flow of gas from the breathing system into the chamber and venting gas into the chamber when pressure in the breathing system exceeds a pressure threshold setting, and a plunger for preventing the flow of gas into the chamber independent of the pressure in the breathing system without changing the pressure threshold setting. The cannister, pressure relief valve, and other components are secured to a manifold having internal flow channels.Type: GrantFiled: March 2, 1995Date of Patent: October 29, 1996Assignee: Delmarva Laboratories, Inc.Inventors: Raymond Koehler, James E. Donaldson
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Patent number: 5535900Abstract: A bottle cap with an air removing device consists of a cap unit and an air stopper combined together. The cap unit includes an upper cap portion, a lower cylindrical portion and a valve formed in an interior of both the upper cap portion and the lower cylindrical portion and having a capsule-shaped cavity for a stopper of the air stopper to fit and move up and down therein to stop an air hole in a bottom of the valve so that the air in a bottle fitted with this cap may be pumped out by an extra air pump fitted in an open cavity of the upper cap portion. After the air in the bottle is pumped out, then the air stopper is pushed down by the air pump again, keeping the cap firmly fixed on the mouth of the bottle in an almost vacuum condition, wherein the food therein may not deteriorate for a long time.Type: GrantFiled: August 11, 1995Date of Patent: July 16, 1996Assignee: P. Yeh Engineering Plastic Corp.Inventor: Kwong-Sun Huang
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Patent number: 5487407Abstract: A valve assembly having a first condition for blocking system fluid flow when system fluid pressure differential across the valve assembly is in a given range above a predetermined pressure differential and a second condition for permitting system fluid flow in one direction when system fluid pressure differential across the valve assembly is greater than the predetermined pressure. The valve comprises a valve housing, a valving member within the housing, a solenoid assembly, first and second springs for exerting force on the valving member and a solenoid energizing circuit. The valve housing defines a fluid flow inlet, a fluid flow outlet and supports a valve seat between the inlet and outlet. The valving member comprises a valving element positioned for engagement with the valve seat and a stem element fixed to and projecting from the valving element.Type: GrantFiled: December 1, 1994Date of Patent: January 30, 1996Assignee: Robertshaw Controls CompanyInventor: Garlan L. Eaker
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Patent number: 5465857Abstract: A vacuum cap for liquor bottles comprising a lower cap body combined on a cylindrical body fixed around a top end of a bottle, an air valve disposed in an annular upper recess of the lower cap body and blocking air holes in the recess and having two upwardly and outwardly extending projections protruding through two slots in an upper cap body fitted in the recess and located over the air valve, an independent air pump being placed on the lower cap body for pumping out the air in the bottle through the air holes and a gap between the air valve and the recess and through the two slots in the upper cap body so as to establish a vacuum in the bottle for preserving liquor contained in the bottle.Type: GrantFiled: September 24, 1993Date of Patent: November 14, 1995Inventor: Heng-Te Yang
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Patent number: 5456284Abstract: A medical access device is adapted to receive an instrument and comprises a housing defining an inner channel and a valve disposed in the channel to form a seal with the housing. The valve includes an outer wall and a pair of inner walls extending in distally converging relationship to define a slot. At least one compression member extends between the outer wall and an associated one of the inner walls. The compression member is compressed in response to insertion of the instrument and exerts a force on the associated inner wall when compressed to reduce leakage of the valve when the instrument is inserted. A funnel is provided at the distal end of the valve to facilitate backloading of the instrument.Type: GrantFiled: May 10, 1993Date of Patent: October 10, 1995Assignee: Applied Medical Resources CorporationInventors: Timothy C. Ryan, Charles C. Hart, Mark A. Ritchart, Donald L. Gadberry
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Patent number: 5455772Abstract: A method of and apparatus for testing an engine or compressor wherein one of an inlet and an exhaust valve (19) is actuated by a hydraulic piston and cylinder arrangement (11) and the flow of hydraulic fluid to the piston and cylinder arrangement (11) is controlled, provides variation of the motion of the valve (19) by adjustment of a control (14, 10) for controlling the hydraulic fluid. Preferably the control is programmed such that the motion of the valve (11) corresponds to the motion that would result from the use of a particular camshaft in the engine or compressor to control valve motion.Type: GrantFiled: April 15, 1993Date of Patent: October 3, 1995Assignee: Lotus Cars LimitedInventors: David Burke, Giles Muddell
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Patent number: 5405038Abstract: This device has three main components: a storage container, an air-tight lid and a pump for extracting air. The storage container is distinguished by a ring-shaped protrusion in the concave bottom of the container. This protruding ring is designed to fit tightly into a concave ring on the lid of another container of the same design. This feature enables the containers to be stacked conveniently on top of one another. The storage container is further distinguished by an elevated lip on the upper rim of the container, which forms an air-tight seal with the lid. The lid is distinguished by a vacuum valve containing two layers with several holes in each layer. The vacuum valve contains an umbrella-shaped silicon piece, which can bend upwards to allow air to be drawn out by the pump, but is restricted from bending downwards (which would allow air to enter the container).Type: GrantFiled: December 2, 1993Date of Patent: April 11, 1995Inventor: Hsiao-Cheng Chuang
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Patent number: 5403168Abstract: A double acting pump having inlet and outlet poppet valves clamped to the pump housing in proximity to an inlet manifold and an outlet manifold. The end portion of each cylinder in the double acting pump is provided with a sloped wall to prevent debris in the pumped fluid from becoming stuck in the pump cylinder. Each poppet includes a valve housing having a spring biased valve head slidably mounted therein and engageable with a removable valve seat. A stem is connected to the valve head and extends through an end wall of the valve housing to the exterior thereof to function as an external indicator rod to indicate the position of the valve head within the valve body. A handle is connected to the stem so that the stem can be manually pulled to lift the valve head from the seat to check the operation of the poppet valve, and a disc is mounted on the stem a predetermined distance from the end wall when the valve is in the closed position so that the wear between the valve seat and head can be obtained.Type: GrantFiled: April 6, 1993Date of Patent: April 4, 1995Assignee: Bayou City Pump Works, Inc.Inventor: W. Randall Evenson
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Patent number: 5394901Abstract: An exhaust gas pressure modulation valve for a diesel engine vehicle combines the functions of an exhaust brake and a warm-up valve and has a single butterfly valve (12) to close the exhaust passage. The butterfly is reactive and opens automatically at a predetermined back pressure to prevent engine damage. The butterfly includes a small bypass passage or aperture (29) to permit a low throughput of exhaust gas when closed.Type: GrantFiled: May 12, 1993Date of Patent: March 7, 1995Assignee: Wabco Automotive (UK) LimitedInventors: Derek Thompson, Robert G. Baines
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Patent number: 5390809Abstract: This invention relates to a vacuum container and in particular to one including an inner container, an outer container receiving said inner container, a lid provided with a packing formed with an outer annular groove for receiving an upper rim of said outer container and an inner annular groove for receiving an upper rim of said inner container, a check valve mounted on a central portion of said lid, a control valve composed of two one-way valves, and a vacuum extractor including a sleeve and a seat engaged with the lower end of said sleeve, said sleeve being a tubular member in which is inserted a piston, said piston having a lower end formed with an upper flange and a lower flange between which is fitted a leak-proof gasket, said upper flange being formed with a pair of exhaust openings.Type: GrantFiled: October 21, 1993Date of Patent: February 21, 1995Inventor: Shui C. Lin
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Patent number: 5382142Abstract: A backwash valve for use in a sucker-rod actuated fluid pump, may be selectively actuated to permit both the standing and traveling ball valves to be unseated at the same time permit the pump to be backwashed and/or the production tubing string drained.Type: GrantFiled: April 6, 1993Date of Patent: January 17, 1995Assignee: Spears Speciality Oil Tools, Inc.Inventor: Harry L. Spears
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Patent number: 5378117Abstract: A cylindrical gas compressor has inlet valves confined therewithin, at opposite ends thereof, and discharge valves, shaft-mounted therebetween, for reciprocation to ingest and compress admitted gas. Outboard of the inlet valves are circular plates from which extend a plurality of fingers. The plates are confined within chambers in the compressor, and radial ports are provided for admitting pressured fluid to the plates to cause them to move inboard, whereby the fingers penetrate the inlet valves and remove the inlet valve valving elements off the valve seat, effecting unloading of the inlet valves. Springs hold the plates outboard of the inlet valves, to allow the valves to function normally-loaded, in the absence of the plate-displacing, ports-admitted, pressured fluid.Type: GrantFiled: March 28, 1994Date of Patent: January 3, 1995Assignee: Dresser-Rand CompanyInventor: Robert A. Bennitt
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Patent number: 5356118Abstract: A telescoping assembly includes an inner tubular member and an outer tubular member, each defining an internal passage. The inner and outer tubular members are mounted to each other for telescoping movement therebetween, and a pair of coaxial springs are mounted within the internal passages defined by the inner and outer tubular members. The springs act to bias the tubular members toward a retracted position. The tubular members are movable to an extended position against the force of the springs, by introduction of pressurized fluid into the internal passages defined by the inner and outer tubular members. A valve is mounted to an end of one of the tubular members, for introducing pressurized fluid into the internal passages defined by the tubular members, and for allowing fluid to be expelled therefrom under the force of the springs, for allowing the inner and outer tubular members to move to their retracted position.Type: GrantFiled: November 30, 1992Date of Patent: October 18, 1994Assignee: Versa Technologies, Inc.Inventor: Robert H. Schneider
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Patent number: 5349998Abstract: An electromagnetic control ( 12, 14, 14A) causes the opening of a valve (1A) blocking the connector (1) of the system (3) to be used; pipes (30, 34, 42) with corresponding connections to a transfer passage (20, 16, 14B, 9, 7A) are controlled by corresponding valves (36, 38, 44); one of the pipes supplies the refrigerant or other pollutant fluid, a second pipe connects the injector to a vacuum source, and a third pipe connects the injector to a suction recovery means, permitting the discharge, recovery or extraction of pollutant gas from the dead space inside the injector and if necessary from the confined volume of said system (3).Type: GrantFiled: November 12, 1992Date of Patent: September 27, 1994Assignee: Galileo Vacuum Tec S.p.A.Inventor: Giovanni Gonfiantini
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Patent number: 5306122Abstract: A diaphragm pump with a flat diaphragm which is held between the face surface of a pump head and the corresponding face surface of a hydraulic block is improved in that the annular clamping region has an angling step such that the clamped-in diaphragm is bent in its outer annular border region. In this way, a sealed tightness is achieved over long time periods, as well as inducing a uniform diaphragm tension which effects performance of the pump advantageously. Inventive valve designs are provided which allow removal for cleaning from outside the assembled pump and also allows manual /pening of the valves for unclogging. An efficient design is provided for a pump head.Type: GrantFiled: August 21, 1992Date of Patent: April 26, 1994Assignee: J. Wagner GmbHInventors: Gerhard Gebauer, Wilfried Goes, Otto Rosenauer
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Patent number: 5255712Abstract: A primary valve orifice (26) divides a check valve cavity into first and second portions (4, 6). A valve member (34) closes the orifice (26) in response to higher pressure in the first portion (4) and is unseated to open orifice (26) in response to higher pressure in the second portion (6). An axial passageway (44) extends through the valve member (34). A control rod (50) extends into the cavity (4, 6) and through the passageway (44). The rod (50) carries a secondary valve plug (52) that is biased by a spring (60) to close one end of the passageway (44), and a pull block (78) that engages the opposite end of the valve member (34). A stem (40) extends from the valve plug portion (36) of the valve member (34) through the orifice (26) and is telescopically received in a sleeve (62). The control rod (50) is pulled to cause the secondary valve plug (52) to unseat and the pull block (78) to engage the sleeve (62). This opens the passageway (44) to equalize pressure on the two ends of the valve member (34).Type: GrantFiled: October 28, 1992Date of Patent: October 26, 1993Inventor: Raymond K. Foster
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Patent number: 5234013Abstract: An apparatus is provided for controlling venting of fuel vapor through an aperture in a fuel tank. The apparatus comprises a housing mounted in the aperture and a valve moveable in the housing between a blocking position blocking flow of fuel vapor from the fuel tank through the housing and a venting position allowing flow of fuel vapor from the fuel tank through the housing. A spring biases the valve towards its blocking position. A mechanism is provided for using fuel vapor from the fuel tank to move the valve against the spring towards its venting position. The using mechanism includes a venting control chamber receiving fuel vapor from the fuel tank in a conduit communicating fuel vapor from the fuel tank to the venting control chamber. The conduit includes a first portion and a second portion moveable relative to the first portion to define an intermediate portion.Type: GrantFiled: July 7, 1992Date of Patent: August 10, 1993Assignee: Stant Manufacturing Inc.Inventors: John J. Roetker, Lowell R. Bell
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Patent number: 5154693Abstract: A flow control device for use in a subcutaneously implanted physiological shunt system includes a relatively rigid base and a resiliently flexible encasement which defines a fluid flow path therethrough from an inlet to an outlet. Two valves for controlling the flow of fluid through the device are situated serially within the fluid flow path between the inlet and the outlet. The fluid flow path includes a first fluid conduit which directs fluid through both valves, and a second fluid conduit which bypasses the first valve and directs fluid only through the second valve. The first valve is constructed to provide a greater resistance to flow through the device than the second valve, and when the second fluid conduit is unobstructed, fluid will tend to flow through the second fluid conduit and bypass the first valve. A plug is integrally formed with a portion of the encasement, for occluding the second fluid conduit.Type: GrantFiled: May 15, 1990Date of Patent: October 13, 1992Assignee: Pudenz-Schulte Medical Research Corp.Inventors: Gary P. East, David A. Watson
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Patent number: 5129414Abstract: In accordance with an illustrative embodiment of the present invention, an expansible chamber device includes a piston movable within a cylinder, a head on the cylinder having intake and exhaust ports, a normally-open intake valve for closing the intake port automatically when the flow rate or velocity of a working medium entering the cylinder reaches a predetermined value, variable restraining means for inhibiting closing of the intake valve in response to flow, an exhaust valve for preventing escape of working medium from the cylinder until cylinder pressure is reduced to a set level, spring means for opening the exhaust valve at that level, and means operable near the top-dead-center position of the piston for automatically opening the intake valve and for closing the exhaust valve to enable the cycle to repeat. A unique system for controlling the variable restraining means, as well as methods for regulating the flow or working medium through said valves, also is disclosed.Type: GrantFiled: October 11, 1990Date of Patent: July 14, 1992Inventors: Thomas R. Glass, Weldon R. Hudson
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Patent number: 5113899Abstract: In a check valve with a valve opening device, a check valve member (32) inserted into a check valve chamber (21) formed in a valve box (20) is resiliently urged for valve closing by means of a check spring (33) as well as the check valve member (32) is manipulated for valve opening through a manipulation lever (45), an actuator shaft (43) and a valve opening member (36) in order. The valve opening member (36) is adapted to be held at a valve opening position (F) by means of a valve opened state holding means (38). The valve opened state holding means (38) is arranged in both the valve opening member (36) and the valve box (20). A manipulation lever return spring (46) is disposed in a manipulation force transmitting system from the manipulation lever (45) to the valve box (20) through the actuator shaft (43).Type: GrantFiled: January 23, 1991Date of Patent: May 19, 1992Assignee: Kabushiki Kaisha KosmekInventor: Keitaro Yonezawa
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Patent number: 5090076Abstract: A multiple cell inflation structure such as an air cushion or mattress has an arrangement for selectively providing communication between the respective cells when the structure is inflated. Each cell has an air inlet-outlet passage connected with an outside valve chamber and an inflation duct is connected to each valve chamber through respective branch ducts. Each valve chamber includes a valve seat and movable valve element. When the structure is being inflated, the air pressure lifts the valves from their seats so as to connect each cell with the inflation duct. When inflated, air pressure in each cell, along with a spring in the respective valve chamber returns the respective valves to their seats and closes off the cells from one another. Each valve chamber also has a distensible membrane for engaging a stem portion of the respective valve element and moving it off the seat so as to provide communication between the respective cells when the membrane is distended.Type: GrantFiled: October 31, 1990Date of Patent: February 25, 1992Inventor: Hans Guldager
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Patent number: 5069239Abstract: A liquid packaging machine includes a filler containing a non-return valve spring-biased closed. The valve includes a closure member to a stem of which is fixed a centering spider, the spokes of which contain iron members. Distributed around the valve housing are horseshoe, permanent magnets. During production of filled cartons, the magnet device is positioned so as not to interfere with the movement of the closure member. However, when air is to be bled from the filler and/or the filler is to be steam-sterilized, the magnet device is positioned to attract the iron members to open the valve against the spring bias.Type: GrantFiled: May 10, 1991Date of Patent: December 3, 1991Assignee: Elopak Systems A.G.Inventors: Kevin R. Bunce, Tore Sorby
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Patent number: 5067518Abstract: A valve for a pressure feed paint cup. An adapter is attached to a lid for the cup. A check valve assembly is secured to a threaded end of the adapter which extends below the lid and a vent valve is secured to a threaded end of the adapter which extends above the lid. An air line is attached to the vent valve to supply pressurized air to the paint cup. The check valve has a spherical valve ball which engages a conical valve seat near the diameter of the ball to increase the seating force without increasing the valve opening force. The valve seat and the valve ball are formed from low friction materials. A valve stem is manually moved to first open a vent valve which vents air pressure from the air line and then to move the valve ball from its conical seat.Type: GrantFiled: May 1, 1991Date of Patent: November 26, 1991Assignee: Ransburg CorporationInventor: Michael J. Kosmyna
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Patent number: 5056555Abstract: A first nozzle is connected to a space to be protected from excess pressure. A valve member releaseably seals the first nozzle. A second nozzle is coupled to an adjustable vacuum source for applying a predetermined vacuum level to the valve member to create a force against the member to seal the first nozzle. Seals are between the first and second nozzles and the member which couple the nozzles when the member disengages from the seals. The member disengages from the seals when the force on the member imposed by gas in the space being protected exceeds the force on the member created by the difference between ambient atmospheric pressure and the vacuum source pressure.Type: GrantFiled: June 22, 1990Date of Patent: October 15, 1991Assignee: U.S. Philips CorporationInventor: Peter Frijlink
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Patent number: 5056556Abstract: A solenoid valve comprising a valve body, and a poppet vertically slidable within the valve body and moved to and from a valve seat so as to open and close an oil passage. The poppet is in the form of a cylindrical tube and is slidably fit around and supported by a guide rod in an oil-tight manner. The guide rod has a valve seat at its bottom and an oil passage for communication with the interior of the poppet. Features of the present invention are as follows. The guide rod has a surface on which the inner peripheral surface of the poppet is slidable. The outer diameter of such a surface of the guide rod is slightly smaller than that of the valve seat. In this way, the solenoid valve acts as an on-off valve and a relief valve. The valve of the type as thus far explained further includes a passage for reducing the flow velocity of an oil as pressurized between the poppet and the guide rod. A surface of the poppet is shaped to maintain an oil film between the poppet and the valve seat.Type: GrantFiled: July 24, 1990Date of Patent: October 15, 1991Assignee: Kabushiki Kaisha FujikoshiInventors: Takashi Nishimoto, Tohru Matsuoka, Fumio Honda, Mineyuki Naruse
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Patent number: 5025830Abstract: The Assembly is formed of individual, radially-fingered plates, set upon a body, in surmounting relationship, and fastened to the body by a central bolt. The Method calls for the provisioning of the body and the radially-fingered plates, setting the plates upon the body, fastening the plates thereon, and bending the fingers, angularly from their plates, into a common parallelism, with the ends of the fingers all terminating in a common plane. The kit sets forth the components for an Assembly: a plurality of radially-fingered plates, a body, and a fastener for fixing the plates onto the body. The Plate is flat, having a uniform thickness, with radially-extending fingers, and apertured in a central portion thereof.Type: GrantFiled: August 16, 1990Date of Patent: June 25, 1991Assignee: Dresser-Rand CompanyInventor: James V. Kursar
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Patent number: 5002088Abstract: A clean in place or sterilize in place valve includes both over pressure and vacuum protection. The apparatus can be remotely operated and monitored to assure that the valve did or will function correctly. The valve housing has a bore that communicates with a vessel. The bore is valved with separately movable pressure valving and vacuum valving members, each separately adjustably set at desired positive/negative pressure valve settings. The vacuum release can be operated independently of the pressure release.Type: GrantFiled: August 30, 1989Date of Patent: March 26, 1991Assignee: Oseco Valve and Service Company, Inc.Inventors: Bill Engelhardt, Charles D. Brown
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Patent number: 4974812Abstract: A valve for controlling release of a pressurized fluid comprising a housing having a fluid chamber with an inlet and an outlet port. A piston within the housing is slidably movable between a sealed closed position and an open position. A collapsed support structure, when in a rigid condition retains the piston in the closed position. When the support means is in a collapsed condition, fluid pressure will cause the piston to slide to the open position of the valve. This support structure includes a pair of elongated supports oriented in one of a dead-center locked condition when the piston is sealed, and in an off-center collapsed condition allowing the piston to move to its open position.Type: GrantFiled: May 31, 1989Date of Patent: December 4, 1990Assignee: Walter Kidde Aerospace, Inc.Inventor: William T. Fleming
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Patent number: 4967791Abstract: A pressure activated check valve comprising a valve body defining an axial fluid flow passage between inlet and outlet ports, a poppet valve assembly disposed in the passage for movement between an open position permitting two-way fluid flow through the passage and a closed position obstructing fluid flow through the passage, a spring for normally biasing the poppet valve assembly to the open position, a fluid pressure port adapted for fluid communication with a selectively pressured fluid source for selectively moving the poppet valve assembly to the closed position in opposition to the spring and elements responsive to fluid pressure in the inlet port for permitting fluid flow from the inlet port to the outlet port when the poppet valve assembly is in the closed position.Type: GrantFiled: April 26, 1989Date of Patent: November 6, 1990Assignee: The Boeing CompanyInventor: Joe E. Sternberger
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Patent number: 4949751Abstract: Apparatus is provided to increase the retarding horsepower of a compression release engine retarder driven from the exhaust valve pushtube or the fuel injector pushtube which includes a plenum communicating with the exhaust valve slave piston and the master piston driven by a remote exhaust valve pushtube or the fuel injector pushtube. A trigger check valve is located between the master piston and exhaust valve slave piston so that the initial motion of the master piston delivers energy to the plenum. At a predetermined point in the travel of the master piston, the trigger check valve is opened by the master piston to permit the delivery of the energy stored in the plenum to the slave piston. Additional pumping capability is provided by a second master piston while a control check valve communicating with the second master piston limits the intake of hydraulic fluid into the system after working pressures have been attained to that hydraulic fluid which may leak from the system.Type: GrantFiled: October 6, 1989Date of Patent: August 21, 1990Assignee: Jacobs Brake Technology CorporationInventors: Zdenek S. Meistrick, Raymond N. Quenneville
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Patent number: 4926945Abstract: A subsurface well safety valve having a curved flapper closure member and method making. The curved flapper has a concave sealing surface coacting with a valve seat. A flow tube has a lower end contoured to the flapper sealing surface. A flapper can be made out of a tubular member in which the inside has been honed providing a flapper with a concave surface which forms a sealing surface.Type: GrantFiled: September 7, 1989Date of Patent: May 22, 1990Assignee: Camco, IncorporatedInventors: Ronald E. Pringle, Arthur J. Morris
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Patent number: 4899782Abstract: A steam pressure cooker (1) is described, which is provided with a lid (2) and a pressure relief valve (8), comprising a valve seat (7a), a valve body (9) adapted to have a load applied thereto in the direction of the valve seat (7a) by means of a spring (11) and an adjustable spring abutment (12), which is adapted to be displaced from an operative position in which the valve body (9) is pressed onto the valve seat (7a) to a steam-discharge position in which the valve body (9) is relieved of the load to such an extent that the steam can escape and which, for the purpose of cleaning, can be removed from the lid (2) to such an extent that the pressure relief valve (8) is freely accessible.Type: GrantFiled: March 8, 1988Date of Patent: February 13, 1990Assignee: WMF Wurttembergische Metallwarenfabrik AGInventors: Jurgen Krejza, Eberhard Roth, Sonja Bolek
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Patent number: 4877624Abstract: A valve that opens and closes in response to changes in the physical environment of the valve. This valve is particularly suited as a relief valve in a microwave system-based, closed vessel digestion procedure. This valve includes a pressure-deformable, resilient wall member having a fluid vent port, and an obstructing member that cooperates with the wall member to open and close the valve.Also provided is a lidded vessel employing this improved valve, an apparatus that includes a microwave system and this lidded vessel, and methods using this improved valve.Type: GrantFiled: April 19, 1988Date of Patent: October 31, 1989Assignee: CEM CorporationInventors: Terry S. Floyd, Wyatt P. Hargett, Jr.
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Patent number: 4838306Abstract: A locking valve assembly for use with air cylinder and in pneumatic circuits and including a locking valve for selectively locking air pressure in the air cylinder. The locking valve is pilot operated to provide for release of air pressure from the air cylinder and also includes a manual override apparatus for providing for release of the locking valve in the absence of pilot pressure.Type: GrantFiled: August 10, 1987Date of Patent: June 13, 1989Assignee: Aladdin Engineering & Mfg., Inc.Inventors: Edward R. Horn, Derek Hopkinson
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Patent number: 4834135Abstract: Two pressure control valves have most components in common. One valve is a direct-acting sequence valve and the other a vented counterbalance valve with pilot assist. Both valves have a set opening pressure which is insensitive to secondary port pressure. Both valves may provide free reverse flow. The valves include a spring force reduction chamber which receives hydraulic fluid at primary port pressure. Part of the opening force exerted at the primary port is offset by pressure in the spring force reduction chamber so that a spring having a smaller spring constant may be used to resist opening force. This offsetting force may be readily modified by changing the diameter of the piston shaft of the valve.Type: GrantFiled: November 1, 1988Date of Patent: May 30, 1989Assignee: Sun Hydraulics Corp.Inventor: Ernest A. DiBartolo
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Patent number: 4831989Abstract: A control valve for use in a fuel injection system of an engine comprises a valve member of plate like form and movable in an inlet chamber between a first seating and a second seating on opposite sides of the valve member. The first sealing is smaller in diameter than the second seating and surrounds a spill flow passage. The inlet chamber connects in use with the pump chamber of a fuel pump. When the valve member is in contact with the second seating a control chamber is formed which is connected by a restricted passage to the pump chamber. Flow of liquid from the control chamber is controlled by a valve element which is movable by an actuator and which conveniently controls flow through an opening in the valve member. In the closed position of the valve member it engages the first seating and the opening is closed by the element.Type: GrantFiled: October 23, 1986Date of Patent: May 23, 1989Assignee: Lucas Industries Public Limited CompanyInventor: Steven N. M. Haines
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Patent number: 4807849Abstract: A fluid flow control device and a compression member therefore permit the clamping of a seal of the device without the presence of internal threads so that high purity can be maintained. The compression member comprises a first suface centrally located on one side of the member for applying a concentrated central force to the seal and a diametrically larger second surface on a second side of the compression member opposite the first side. At least a radially outer portion of the second surface is elevated with respect to a radially inner portion thereof to provide a contact surface upon which the diametrically larger force is applied.Type: GrantFiled: October 14, 1987Date of Patent: February 28, 1989Assignee: Veriflo Corp.Inventor: Daniel P. Morgan
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Patent number: 4760863Abstract: A pressure vacuum valve arrangment for the fitting to the vent pipe of a tank for the storage of volatile fuel comprises a first valve to open on increasing pressure of the tank to allow escape of air and vapors from the tank and a second valve adapted to open on decrease of pressure in the tank due to withdrawal of fuel to allow air to enter the tank. To the top is fitted a sleeve forming a venturi action to disperse the vapors into the atmosphere, and to the entry of the second valve is provided a bag filter to prevent dust entering the tank.Type: GrantFiled: March 5, 1987Date of Patent: August 2, 1988Inventor: Peter C. Broer
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Patent number: 4728010Abstract: A keg tapper for use with a keg having a neck with a closure valve carried therein and a flange with a tapered edge on the neck. An arrangement for attaching the tapper at the flanged neck so that completion of the attachment opens the inner valve of the keg closure. A plunger carried in the keg tapper with an arrangement for moving the plunger axially within the tapper body to engage the keg closure and open the outer valve. A keg tapper which can be utilized in the tavern configuration and in the picnic configuration.Type: GrantFiled: July 22, 1986Date of Patent: March 1, 1988Inventor: Mack S. Johnston
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Patent number: 4700763Abstract: A novel inflation/deflation system for the pneumatic tires of a vehicle, and particularly of an aircraft, is described, which comprises a housing on the vehicle, such as in the form of a fixed axle housing, on which the tire and wheel are mounted for rotation, and defining a cavity coaxial with the axis of rotation of the wheel for housing the valve and related components; a manifold within the housing defines a manifold chamber containing and supporting an axially movable poppet valve; a remotely controllable solenoid is mounted within the axle housing coaxially with the manifold and poppet valve, the plunger of the solenoid being operatively connected to the poppet valve for axial movement of the poppet valve between open and closed positions in response to operation of the solenoid, whereby pressurized air may be selectively supplied from a pneumatic source to the manifold and to the tire through pneumatic lines connected thereto.Type: GrantFiled: October 4, 1985Date of Patent: October 20, 1987Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: Donald E. Williams
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Patent number: 4700748Abstract: The point at which pump out pressure exceeds load is sensed to provide a point for scheduling flow to an actuator in a hydraulic system. Flow is controlled by a stepper motor (28) that moves a flow control valve (27). The steps needed to achieve fixed flow changes are greater for high flow positions. When the pump (21) is turned on, the valve (27) is positioned to bypass flow; the bypass flow is then programmably decreased to the actuator. Reverse flow is regulated by the valve (27) to control actuator retraction. Reverse flow is initiated by opening a check valve (40) with an actuator (50) that opens it first to reduce pressure across the valve, then fully. The flow control valve (27) also operates to relieve excess pressure in the system.Type: GrantFiled: April 17, 1986Date of Patent: October 20, 1987Assignee: Otis Elevator CompanyInventors: Giorgio Fossati, Harold Terry, Giuseppe Manco
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Patent number: 4678117Abstract: A system working in conjunction with a regulator having a diaphragm for controlling gas pressure within a gas system, wherein there is provided a spring system to control the diaphragm of the regulator, maintaining the regulator at a constant pressure upon adjustment of the spring. There is further provided an actuator mechanism, operating in conjunction with a sensing means comprising a closed cylindrical container containing gas, such as, butane, propane, or the like where upon expansion of the gas due to ambient temperature would activate the actuator mechanism for reducing the spring pressure on the diaphragm, and thus the gas pressure within the system. Likewise, where there is to be a reduction in ambient temperature, the concommitant contraction of a gas within the sensing means, allows increased pressure on the diaphragm for providing increased gas pressure within the regulator.Type: GrantFiled: May 5, 1986Date of Patent: July 7, 1987Inventors: Wesley J. Trahan, Albert B. Montandon
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Patent number: 4672996Abstract: The present invention provides an improved valve. This valve opens and closes in response to a change in the physical environment of the valve. This valve is particularly suited as a relief valve in a microwave system-based, closed vessel digestion procedure. This valve includes a pressure-deformable, resilient wall member having a fluid vent port, and an obstructing member that cooperates with the wall member to open and close the valve. Also provided is a lidded vessel employing this improved valve, an apparatus that includes a microwave system and this lidded vessel, and methods using this improved valve.Type: GrantFiled: May 22, 1986Date of Patent: June 16, 1987Assignee: CEM CorporationInventors: Terry S. Floyd, Wyatt P. Hargett, Jr.
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Patent number: 4669500Abstract: The invention disclosed herein relates to a check valve actuator for opening and closing a check valve, utilizing system pressure. The check valve actuator is comprised of a piston connected to a clapper assembly by a connecting rod. The piston is slideably received in a piston cylinder containing a control valve and a latching stem. A protective cage and a protective cover are mounted over the piston cylinder.Type: GrantFiled: May 23, 1986Date of Patent: June 2, 1987Assignee: Wheatley Pump and Valve, Inc.Inventor: John L. Strelow
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Patent number: 4660597Abstract: A fuel pressure regulator is shown as having two distinct and variable chambers sharing, as a common wall therebetween, a pressure responsive diaphragm which controls the position of a valve actuator depending upon the pressure differential existing across the diaphragm with such pressure differential being reflective of the pressure differential existing as from the magnitude of the pressure of the fuel in a first of the two chambers to the magnitude of the pressure within the second of the two chambers which is at ambient atmospheric pressure; a flapper type valve openable by the valve actuator serves to control the flow of fuel into the first of the two chambers from where the pressure regulated fuel flows as to associated fuel metering apparatus.Type: GrantFiled: June 26, 1985Date of Patent: April 28, 1987Assignee: Colt Industries Operating CorpInventor: Warren H. Cowles