Biased Valve Patents (Class 137/877)
  • Patent number: 10137294
    Abstract: A method for protecting a pressure transducer from fluid pressure damage using a pressure isolation mechanism is disclosed. The method includes associating the pressure transducer with an isolation port of the pressure isolation mechanism, placing a pressurizing device for delivering fluid under pressure in fluid connection with an inlet port of the pressure isolation mechanism, and actuating the pressurizing device to cause fluid flow in the inlet port such that a free floating, fluid flow responsive valve member positioned in an internal cavity of the pressure isolation mechanism engages a seal seat therein to attain a closed position, preventing fluid flow between the inlet port and the isolation port and thus prevent overpressure in the isolation port. Hemodynamic pressure signals read with the pressure transducer may be transmitted at least in part through a body of the valve member, or a portion thereof, when in the closed position.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: November 27, 2018
    Assignee: BAYER HEALTHCARE LLC
    Inventors: Michael A. Spohn, John A. Haury
  • Patent number: 9808571
    Abstract: A pressure sensor for use with a fluid delivery system having good sensitivity at low pressure, but also configured to remain in operating condition after being exposed to high pressures is disclosed herein. In one variation, the pressure sensor includes a fluid path set, a deformable element associated with the fluid path set and configured to deform in response to an external pressure, and a pressure transducer for monitoring deformation of the deformable element. In certain embodiments, the pressure sensor is configured to measure fluid pressure within the range of between about 0 mm Hg to about 300 mm Hg. However, the sensor pressure is also be configured to remain functional after being exposed to pressure in excess of about 60,000 mm Hg.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: November 7, 2017
    Assignee: BAYER HEALTHCARE LLC
    Inventors: Michael A. Riley, Gerald W. Callan, Michael A. Spohn, Michael J. Swantner
  • Patent number: 9309984
    Abstract: A temperature control outlet device including a body, a faceplate and an outlet assembly inside the body; the outlet assembly includes a valve connected to the body; the valve includes a mainstream and a diversion vent; a valve rod is provided inside the mainstream for blocking water flow in the mainstream via a bias spring on the bottom and a memory spring on the top. The diversion vent is connected to a diversion assembly. The diversion assembly includes a switching rod having one end connected to a reset spring and another end connected to a button. The temperature control outlet device automatically stops outflow of water when the water turns from cold to hot.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: April 12, 2016
    Inventors: Kyle William Cutler, Qingshuang Li, Mengshi Guo, Kaihuang Zhu
  • Publication number: 20150068621
    Abstract: A gas pressure regulator is disclosed that includes a reciprocating piston that engages and disengages from a seat to open the higher pressure and lower pressure sides of the regulator to one another. The regulator includes an elastomer seal between the seat and the piston that has an ignition rating sufficient to avoid combustion in the presence of oxygen at pressure differentials that are a factor of between 5 and 10 between the higher pressure and lower pressure sides of the regulator.
    Type: Application
    Filed: October 29, 2013
    Publication date: March 12, 2015
    Inventors: Timothy Brian Conner, William Clinton Osteen, Mark Kendrick Hamm, John Byron Miller
  • Patent number: 8919384
    Abstract: The fluid delivery system includes a pressurizing device for delivering a pressurized injection fluid, a low pressure fluid delivery system, and a pressure isolation mechanism adapted for fluid communication with the pressurizing device and low pressure fluid delivery system. The pressure isolation mechanism includes a housing body defining an inlet port, an isolation port, and an internal cavity, where the housing body defines a seal seat in the internal cavity between the inlet port and isolation port. A valve member is free floating in the internal cavity and is adapted to engage the seal seat. The valve member has an open position permitting fluid communication between the inlet port and isolation port, and is fluid flow responsive to fluid flow in the inlet port to engage the seal seat and attain a closed position preventing fluid communication between the inlet port and isolation port.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: December 30, 2014
    Assignee: Bayer Medical Care Inc.
    Inventors: Michael A Spohn, John A Haury
  • Publication number: 20140020778
    Abstract: A protection valve includes: an input chamber into which air is introduced; a plurality of output ports through which air is discharged; and safety valves which open in response to a pressure increase on a primary side or close in response to a pressure decrease on a secondary side, the safety valves including a safety valve PV21 and a safety valve PV23. An air flow path from the input chamber is branched into a first branch line and a second branch line, and a time lag-creating valve having an opening pressure higher than the safety valve PV21 is provided at a upstream of the safety valve PV23 in the second branch line, so that the safety valve PV23 can open with a time lag after the safety valve PV21 opens, regardless of the difference between the opening pressures of the safety valves PV21 and PV23.
    Type: Application
    Filed: February 9, 2012
    Publication date: January 23, 2014
    Applicant: NABTESCO AUTOMOTIVE CORPORATION
    Inventor: Ichirou Minato
  • Publication number: 20120073560
    Abstract: A duel fuel gas control valve controls the supply of gas (e.g., natural gas or liquid propane gas) to a gas grill. The duel fuel gas control valve is structured to control either natural or LP gas flow at the desired operating characteristics based on conventional gas supply characteristics and gas grill requirements. A restrictor mechanism, when in first and second configurations, respectively, restricts movement of the valve core to a first predetermined range for a first mode of operation (first type of gas supply) and to a second predetermined range for a second mode of operation (second type of gas supply).
    Type: Application
    Filed: May 23, 2011
    Publication date: March 29, 2012
    Inventor: Daniel Parrish
  • Publication number: 20120067445
    Abstract: A device is provided for handling animal waste gas and suppressing global warming. The device includes a hood, a feces tube that is provided with a first one-way valve, and at least one waste gas tube that is provided with a second one-way valve. The waste gas tube has an end connected to a container. When an animal expels waste gas and fecal matter, the fecal matter is allowed to drop into the feces tube and passes through the first one-way valve. The waste gas is conducted through the second one-way valve into the container for storage. As such, the waste gases expelled from cows and horses can be re-used in order to reduce pollution caused thereby, increase energy sources, and suppress the greenhouse effect of the Earth.
    Type: Application
    Filed: September 17, 2010
    Publication date: March 22, 2012
    Inventors: TSUNG-HAI CHEN, Kou-Sing Chen
  • Publication number: 20110061756
    Abstract: A duck beak valve and/or pumps/pump systems that use such a valve are disclosed. The valve may include a flexible tube having an inlet portion and an outlet portion and a spigot having a spigot inlet portion and a spigot outlet portion. The inlet portion of the flexible tube is sealed relative to the spigot. Inner surfaces of the flexible tube outlet portion downstream of the spigot outlet portion close together when the valve is closed. At least one reinforcement engages the flexible tube and is adapted to pivot at an inlet end so that an outlet end of the reinforcement moves toward and away from a centerline of the flexible tube. The reinforcement reinforces the flexible tube against an externally applied backpressure when the outlet end of the reinforcement is disposed toward the centerline and the valve is closed.
    Type: Application
    Filed: September 27, 2010
    Publication date: March 17, 2011
    Inventor: Ian D. Doig
  • Publication number: 20090293976
    Abstract: A valve is provided including a first valve member and a second valve member. The first valve member includes a first step and a first orifice adjacent the first step. The second valve member includes a second step and a second orifice adjacent the second step. The second valve member is movable relative to the first valve member between an open position, in which the first orifice is fluidly connected the second orifice, and a closed position, in which the first orifice is substantially fluidly disconnected from the second orifice. The first and second steps are fluidly connected to the second orifice and substantially fluidly disconnected from the first orifice when the second valve member is in the closed position, and the first and second steps are fluidly connected to the first and second orifices when the second valve member is in the open position.
    Type: Application
    Filed: June 2, 2009
    Publication date: December 3, 2009
    Inventor: Dale A. Stretch
  • Patent number: 7610936
    Abstract: The fluid delivery system includes a pressurizing device for delivering a pressurized injection fluid, a low pressure fluid delivery system, and a pressure isolation mechanism adapted for fluid communication with the pressurizing device and low pressure fluid delivery system. The pressure isolation mechanism includes a housing defining an inlet port, an isolation port, and an internal cavity. The housing defines a seal seat in the internal cavity between the inlet port and isolation port. A valve member is disposed in the internal cavity. The valve member is free floating in the internal cavity and is adapted to engage the seal seat. The valve member has an open position permitting fluid communication between the inlet port and isolation port, and is fluid flow responsive to fluid flow in the inlet port to engage the seal seat and attain a closed position preventing fluid flow between the inlet port and isolation port.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: November 3, 2009
    Assignee: MEDRAD, Inc.
    Inventors: Michael A. Spohn, John A. Haury
  • Publication number: 20090193617
    Abstract: [Object] To provide a one-way valve and a door check apparatus which is compact and includes a small number of components.
    Type: Application
    Filed: June 5, 2007
    Publication date: August 6, 2009
    Inventors: Kenji Yamamoto, Yoshiteru Igarashi, Akihiko Okimura
  • Publication number: 20080203001
    Abstract: A check valve (10) comprises, a flexible tube (11) having first and second end portions defining an inlet (13) and an outlet (14), respectively, and a rigid valve body (12) surrounding the flexible tube (11). The end portions of the flexible tube are sealingly fixed to the valve body (12) to define an enclosed space (17) between the exterior of the flexible tube and the interior of the valve body. A fixed volume of a substantially incompressible fluid is located in the enclosed space (17). When the pressure at the outlet (14) is greater than the pressure at the inlet (13), the flexible tube is substantially collapsed so as to close the valve or allow severely restricted flow. However when the pressure at the inlet is greater than that at the outlet, some of the fluid is displaced from the inlet area towards the outlet area so that the flexible tube (11) is expanded in the area adjacent the inlet and the tube is substantially open.
    Type: Application
    Filed: April 11, 2006
    Publication date: August 28, 2008
    Inventor: Ian D. Doig
  • Publication number: 20080066817
    Abstract: A device for adjusting and throttling the flow-rate of a fluid, particularly medical oxygen and compressed gases in general, which comprises a valve body which defines an input port and an output port for a fluid at high pressure; the input port is controlled by a high-pressure flow control element; an input duct is also provided for a low-pressure fluid which is connected to a rotating body with a control port which can be arranged at the calibrated holes provided in an adjustment disk and connected to at least one output duct; a single actuation handwheel is further provided which drives the high-pressure flow control element and the rotating body.
    Type: Application
    Filed: September 10, 2007
    Publication date: March 20, 2008
    Inventor: Giancarlo Nicolini
  • Patent number: 7252117
    Abstract: A stub-out cover for protecting the outer surface of a stub-out line. The stub-out cover includes a substantially rigid, molded tubular member open at one end and closed at the other end. A plurality of flexible tab members extend from the inner wall of the tubular member inwardly toward the longitudinal axis of the tubular member. Each tab member has a height that is slightly greater than the distance between the inner wall of the tubular member and the outer surface of the stub-out to be protected. When placed onto a stub-out, the tab members bend to tightly engage the outer surface of the stub-out.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: August 7, 2007
    Inventor: William F. Glenn
  • Publication number: 20040211477
    Abstract: Disclosed is a composite valve comprising a valve body that is provided integrally with a solenoid valve portion and a differential pressure valve portion. The valve body is formed with an upper valve chest, a lower valve chest, a refrigerant introduction chamber that communicates with the upper valve chest and has a differential pressure valve seat, and a back pressure introduction chamber that communicates with the lower valve chest. A main valve element that is opened and closed by means of the solenoid valve portion is located between the upper valve chest and the lower valve chest. A differential pressure valve element that is opened and closed by means of a differential pressure between the refrigerant introduction chamber and the back pressure introduction chamber is located between these two chambers. The refrigerant introduction chamber, back pressure introduction chamber, and differential pressure valve element are arranged so as not be situated on the outer surface of the valve body.
    Type: Application
    Filed: April 7, 2004
    Publication date: October 28, 2004
    Inventors: Hiroyuki Ezaki, Kazuhiko Watabe
  • Patent number: 6766829
    Abstract: Within a housing (3), a gas inlet (4) communicates with a gas outlet (5) through an inlet passage (11), a shut off valve (12) and an outlet passage (13), and a charging port (6) communicates with a discharging port (7) via a bypass passage (14). The outlet passage (13) is provided with a first pressure reducing valve (21) of piston type, a second pressure reducing valve (22) of diaphragm type and a first check valve (31) for retaining residual pressure, in series in the mentioned order. The bypass passage (14) is provided with a second check valve (32) which inhibits a flow from the discharging port (7) to the charging port (6).
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: July 27, 2004
    Assignee: Kabushiki Kaisha Neriki
    Inventors: Masaru Takeda, Osamu Hirakami, Shinji Maekawa
  • Publication number: 20020112769
    Abstract: A valve assembly for use with a high pressure fluid gun includes a valve seat connected to a valve sleeve by a spring. The valve seat and the valve sleeve are crimped around opposing ends of the spring. A valve pin is secured to the valve sleeve, the spring allowing for the movement of the valve pin when a trigger mechanism is actuated. When installed, the valve pin is received and guided by a bore in the body of the fluid gun. When the valve pin is actuated by a trigger mechanism, a seat end of the valve pin sealingly engages an angled seat of the valve seat to direct the flow of fluid through a high pressure outlet.
    Type: Application
    Filed: February 20, 2001
    Publication date: August 22, 2002
    Applicant: NLB Corp.
    Inventors: Matthew O. Herhold, Daniel D. Trunick
  • Publication number: 20020092575
    Abstract: Within a housing (3), a gas inlet (4) communicates with a gas outlet (5) through an inlet passage (11), a shut off valve (12) and an outlet passage (13), and a charging port (6) communicates with a discharging port (7) via a bypass passage (14). The outlet passage (13) is provided with a first pressure reducing valve (21) of piston type, a second pressure reducing valve (22) of diaphragm type and a first check valve (31) for retaining residual pressure, in series in the mentioned order. The bypass passage (14) is provided with a second check valve (32) which inhibits a flow from the discharging port (7) to the charging port (6).
    Type: Application
    Filed: March 15, 2002
    Publication date: July 18, 2002
    Inventors: Masaru Takeda, Osamu Hirakami, Shinji Maekawa
  • Patent number: 6341624
    Abstract: A valve for cryogenic fluids that divides incoming fluid into separate outlets. The valve prevents the inadvertent leakage or reverse flow of fluid through the valve using a swing-type check valve, and may also remove undesirable debris from the fluid. The valve comprises a valve housing and at least one valve actuator. The housing includes an inlet and at least one outlet, and has an inlet chamber and at least one outlet chamber that are adapted to receive fluid from the inlet and deliver the fluid to the outlet. The inlet chamber and the outlet chamber are fluidly coupled by a valve aperture that is defined by a valve seat. The valve actuator cooperates with the valve seat to seal the inlet chamber from the outlet chamber. In one embodiment, the valve includes a check valve that is pivotally mounted in the valve housing to prevent fluid flow from the valve housing through the inlet. In another embodiment, the valve includes a pair of outlets, a pair of outlet chambers and a pair of valve actuators.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: January 29, 2002
    Assignee: Goddard Valve Corporation
    Inventors: Donald R. Nelson, Robert L. Russell
  • Publication number: 20010015230
    Abstract: Within a housing (3), a gas inlet (4) communicates with a gas outlet (5) through an inlet passage (11), a shut off valve (12) and an outlet passage (13), and a charging port (6) communicates with a discharging port (7) via a bypass passage (14). The outlet passage (13) is provided with a first pressure reducing valve (21) of piston type, a second pressure reducing valve (22) of diaphragm type and a first check valve (31) for retaining residual pressure, in series in the mentioned order. The bypass passage (14) is provided with a second check valve (32) which inhibits a flow from the discharging port (7) to the charging port (6).
    Type: Application
    Filed: February 15, 2001
    Publication date: August 23, 2001
    Inventors: Masaru Takeda, Osamu Hirakami, Shinji Maekawa
  • Patent number: 5640997
    Abstract: An improved rotor retainer housing for a rotatable rotor body and a relief sealing mechanism for a gas flow rate regulator. The retainer housing having structural features equivalent to the essential corresponding features of a conventional metal part is formed of molded plastic. A thin metallic layer is provided on the exposed surfaces of the molded plastic part to enhance surface conditions for maintaining an effective seal between the retainer housing and associated parts. The relief sealing mechanism utilizes a separate relief valve and relief valve seal to prevent premature failure of the seal during normal operating pressures. The seal is a metal retaining ring having a polymer O-ring integrally formed within the retaining ring. The O-ring provides sealing surfaces between the relief valve and the gas inlet on the regulator.
    Type: Grant
    Filed: June 8, 1995
    Date of Patent: June 24, 1997
    Assignee: B & F Medical Products, Inc.
    Inventors: George Dennis Reed, Robert L. Weaver
  • Patent number: 5365975
    Abstract: A constant air pressure unit for an air handling system. The unit comprises a housing having an air inlet opening for admitting pressurized air into the housing. The housing has a top wall with a by-pass opening therein and a door is displaceably retained over the by-pass opening. The door has a predetermined load whereby the door is caused to lift away from the by-pass opening when the pressure of the air in the housing is equal to the pressure required to lift the load. The door load defines a maximum housing pressure. In the case where the pressure at the inlet opening starts to increase above the predetermined maximum housing pressure, the door lifts and by-passes the excess pressurized air and thus limits the inlet and housing pressures. In a corollary unit, an air outlet opening for releasing air is included. A pressurized airflow path is defined between the inlet opening and the outlet opening.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: November 22, 1994
    Assignee: E. H. Price Ltd.
    Inventor: Anthony Cote
  • Patent number: 4998562
    Abstract: A flow control valve to regulate the bleed flow rate of a pressurized vessel at one of only two available bleed flow rates. The flow control valve comprises an axial main gas flow passageway with an integral check valve that allows pressurization of the vessel, a bleed passageway for depressurization of the vessel, and a threaded bleed passageway cap that allows bleeding of the vessel at one of only two rates available, based on the counter-rotated position of the bleed cap.
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: March 12, 1991
    Assignee: Halkey-Roberts Corporation
    Inventor: Carl L. Foltz
  • Patent number: 4913260
    Abstract: A gas silencing system for controlled sound attenuation of the exhaust gas in a motor vehicle comprises a sound attenuation muffler for exhaust gases. The system also includes means providing a bypass passage for gas to flow around at least part of the muffler. Bypass control valve is provided to allow selective regulation of the flow of exhaust through the muffler and the pass-pipe. The bypass control valve is responsive to a modulated pressure signal controlled by the driver of the vehicle. The invention also includes circuits for visually indicating the amount of bypass flow and the sound level of gas leaving the system.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: April 3, 1990
    Assignee: Tenneco Inc.
    Inventor: Blaise M. Fallon
  • Patent number: 4749005
    Abstract: A gas stove (A) includes a combined pressure regulator and manual shut off valve (C) which has an inlet (46) connected with a source (B) of natural gas. The combined valve includes a pressure regulator (60) in fluid communication with the inlet through a regulating valve assembly (64, 66). The regulating valve assembly which controls the flow of gas to a regulator chamber (62) is controlled by a diaphragm (68) and a spring (70) to maintain the pressure in the chamber substantially constant. A first outlet (48) is connected by a passage (72) directly with the regulator chamber for supplying pressure regulated gas to a plurality of range burner control valves (20) and range burners (22). A poppet valve (80) having only two stable states, fully open and fully closed, is connected between the regulator chamber and a second outlet (50). A manually graspable lever (52) and a cam member (86) enable the state of the poppet valve to be controlled.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: June 7, 1988
    Assignee: Eaton Corporation
    Inventor: Frank H. Bergquist
  • Patent number: 4744391
    Abstract: A flow control valve operable to bleed pressure from a pressurized source. The flow control valve includes an integral body, a bleed cap, a bleed valve element and a check valve assembly formed of a valve housing and a valve element.
    Type: Grant
    Filed: May 23, 1986
    Date of Patent: May 17, 1988
    Assignee: Halkey-Roberts Corporation
    Inventor: George E. Lardner
  • Patent number: 4700748
    Abstract: 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: Grant
    Filed: April 17, 1986
    Date of Patent: October 20, 1987
    Assignee: Otis Elevator Company
    Inventors: Giorgio Fossati, Harold Terry, Giuseppe Manco
  • Patent number: 4692253
    Abstract: Method and apparatus for removing extraneous matters from cooling water used in a tubular heat exchanger such as a condensor is disclosed. When a pressure difference between the portions upstream and downstream of a filter element exceeds a predetermined threshold value set in advance in accordance with the flow rate of the cooling water, a blow-down operation is started to remove the extraneous matters scraped off of the outer peripheral surface of the filter element by a turning flow. The extraneous matters are removed at a rate of clogging of the filter element of 50%, irrespective of the flow rate of the cooling water. The clogging rate can be sensed accurately, and the blow-down operation is effected with necessary and sufficient frequency.
    Type: Grant
    Filed: July 27, 1984
    Date of Patent: September 8, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Katsumoto Otake, Masahiko Miyai, Yasuteru Mukai, Isamu Okouchi
  • Patent number: 4690171
    Abstract: A valve assembly for a sphygmomanometer controls the inflation and deflation of a pressure cuff. The valve assembly includes an inlet connectable to a fluid pressure source such as a bellows, an outlet which is connectable to a blood pressure cuff, an inlet directional control which actively prevents the flow of fluid from the outlet to the inlet, axial passages which connect the inlet to the outlet, and means for slowly and fixedly or rapidly releasing pressure. The valve assembly may be set to one of three positively located positions: a cuff inflation position, a metered deflation position, or a fast vent position. In the cuff inflation position, fluid pressure delivered to the valve assembly's inlet passes through an inlet directional control to the valve assembly's outlet and on to the pressure cuff which becomes inflated.
    Type: Grant
    Filed: June 5, 1986
    Date of Patent: September 1, 1987
    Inventor: Charles F. Johnston
  • Patent number: 4664155
    Abstract: A single manifold assembly is located in an easily accessible hydraulic servicing bay. The assembly includes a manifold (2) with an inlet port (4) having an integral check valve (8). A plurality of branch conduits (18), one for each reservoir, communicate with manifold (2). A two-way shut-off valve (20) is located in each conduit (18). Each valve (20) has a handle (22) for manually moving it between an open and a closed position. Each conduit (18) communicates with its corresponding reservoir. Manifold (2) includes a manual bleed valve (12) and an automatic relief valve (16). By selective positioning of the shut-off valves (20) and operation of bleed valve (12) and inlet port (4), any or all of the reservoirs may be depressurized or pressurized. Preferably, an automatic bleed valve (26) is provided for each individual reservoir. A single gauge (30) mounted on manifold (2) provides pressure readings for any one of the individual reservoirs by selective positioning of valves (20 ).
    Type: Grant
    Filed: April 30, 1986
    Date of Patent: May 12, 1987
    Assignee: The Boeing Company
    Inventors: Ralph Archung, George C. Loetz
  • Patent number: 4585623
    Abstract: The invention provides a device for performing chemical or immunochemical assays quickly and on site. The device comprises a plastic molded body which may be miniaturized. The device is provided with a plurality of tubes for containing assay reagents, a small bore tube in which the assay is carried out, a sample tube, and conduit and valve means from the various tubes to the assay tube. The device is insertable into a programmable apparatus which controls the flows of the various reagents through the assay tube by means of plungers acting on pistons located in each reagent tube.
    Type: Grant
    Filed: April 10, 1985
    Date of Patent: April 29, 1986
    Assignee: Allelix Inc.
    Inventor: Howard M. Chandler
  • Patent number: 4516594
    Abstract: A multi-port valve comprises a valve seat skeleton and a valve body of readily castible material cast about the skeleton. The valve seat skeleton comprises a plurality of wear-resistant members each having a wear-resistant operative surface formed thereon. The wear-resistant members are secured to one another to retain the wear-resistant operative surfaces thereof in a predetermined fixed arrangement. The valve body has a plurality of valve passages formed therein, one for each valve port, at least one of said passages opening to expose each wear-resistant operative surface for engagement by a movable valve component mounted in each valve passage to bear against and move relative to each wear-resistant operative surface in use. The valve is manufactured securing a plurality of wear-resistant members to one another to form a valve seat skeleton on which the wear-resistant operative surfaces are arranged in a predetermined fixed relationship, and casting the valve body about said skeleton.
    Type: Grant
    Filed: April 3, 1984
    Date of Patent: May 14, 1985
    Assignee: Diesel Equipment Limited
    Inventors: John C. Martin, Paul H. Martin
  • Patent number: 4489757
    Abstract: An electrically actuated servocontrol system for a static pressure-operated load is connected to a supply of hydraulic fluid under pressure. The supply has an outlet port and a return port. A relief means is connected across the supply port for maintaining the supply at a constant pressure. A servocontrol valve has its inlet coupled to the outlet of the outlet port of the supply and its outlet coupled through a flow restrictor to the return sump of the power supply. The load is coupled between the output of the servocontrol valve and the flow restrictor. The flow restrictor also includes means for adjustably varying the amount of restriction so that the function of the servovalve can be made with linear variations in input control signals.
    Type: Grant
    Filed: December 3, 1979
    Date of Patent: December 25, 1984
    Assignee: Conoco Inc.
    Inventor: William T. Sweeney
  • Patent number: 4391321
    Abstract: A heat exchanger in combination with two duct system for bringing in relatively cold outside air into an enclosure while exhausting relatively warm room air from the enclosure. The heat exchanger is positioned so as to recover heat from the exhaust air into the incoming cold fresh air. A valving system switches the incoming cold air with the warm exhaust air in the flow paths of the heat exchanger. This solves the problem of moisture from the exhaust air condensing on the walls of the ducting system for the exhaust air.
    Type: Grant
    Filed: November 20, 1980
    Date of Patent: July 5, 1983
    Inventor: Svante Thunberg
  • Patent number: 4380251
    Abstract: A valve construction having a housing provided with a chamber and ports leading to the chamber and having an axially movable piston unit disposed in the chamber to interconnect certain of the ports together in relation to the axial position of the piston unit that is caused by a condition responsive device and a spring operatively associated with the piston unit, the piston unit comprising a plurality of pistons disposed in spaced substantially parallel relation and being secured together to be axially moved in unison in the chamber under the influence of the condition responsive device. The spring comprises a single coiled compression spring telescopically receiving the pistons therein, the pistons being of different lengths.
    Type: Grant
    Filed: December 9, 1981
    Date of Patent: April 19, 1983
    Assignee: Robertshaw Controls Company
    Inventor: Marvin P. Weaver
  • Patent number: 4353243
    Abstract: A multiport flexible diaphragm controlled valve is disclosed. The parts are all interconnected by low dead volume channels. The valve provides extremely fast response times, no moving parts other than the control diaphragm, operability over a wide range of operating conditions including high temperatures and is adaptable to use with all types of chromatography systems. The valve may also be utilized in a double sided configuration enabling two independent flow patterns to coexist simultaneously and be switched totally independent of one another.
    Type: Grant
    Filed: February 2, 1981
    Date of Patent: October 12, 1982
    Assignee: Quadrex Corporation
    Inventor: Archer J. P. Martin
  • Patent number: 4272021
    Abstract: A pipeline having a plurality of outlets spaced along its length is connected to a controllable supply of liquid under pressure. A transversely expandable and collapsible bladder is fixed in position within the pipeline interior and extends along its length to overlap the locations of the outlets. Air or other compressible gaseous material is provided within the bladder at a pressure less than the supply liquid pressure, causing the bladder to be expanded to substantially fill the interior of the pipeline when it is emptied of liquid. When the connection between the liquid supply and lateral pipeline is open, the bladder is collapsed within the pipeline to permit passage of liquid to the outlets. When the connection is closed, the pressurized bladder is permitted to expand and thereby expel liquid remaining within the pipeline through the outlets. Longitudinally spaced compressible plugs are located between the outlets to prevent gravitational flow of liquid during draining of the pipeline.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: June 9, 1981
    Inventor: Norman S. Standal
  • Patent number: 4195777
    Abstract: An improved hot water heating system used with an internal combustion engine is disclosed. This system provides a hot water flow control arrangement in which hot water supplied to a heating radiator is controlled by a valve and a pressure responsive bypassing means to keep a comfortable temperature. The pressure responsive bypassing means is closed when the maximum heating capacity is required to avail to the heating radiator all the hot water supplied by the engine even when the hot water pressure increases to exceed a bypassing pressure level.
    Type: Grant
    Filed: January 30, 1978
    Date of Patent: April 1, 1980
    Assignee: Nippondenso Co., Ltd.
    Inventors: Munemitsu Ikebukuro, Masao Yamaguchi
  • Patent number: 4134428
    Abstract: In a non-drip valve for a fluid-flow line having a supply chamber, a discharge chamber and a vacuum chamber connected to the discharge chamber to withdraw fluid therefrom when the forward flow is arrested, pressure-responsive valve means controlling the forward flow from the supply chamber to the discharge chamber, and relief valve means to permit reverse flow bypassing said pressure-responsive valve when it is closed. Preferably a selectively-operable valve is provided to put said pressure-responsive valve in working condition.
    Type: Grant
    Filed: August 18, 1977
    Date of Patent: January 16, 1979
    Inventor: Curt A. Bjorklund
  • Patent number: 4100940
    Abstract: An irrigation pipeline has a plurality of emitters equipped with discharge nipples for engagement by flexible hoses to release water at a trickle rate at selected subterranean locations within the radii of the hoses. A plurality of the nipples may be integral with a plastic manifold that is installed between confronting pipe ends and some of the nipples may be blind nipples that are sheared for activation of the emitters as required to meet increased demand for water.
    Type: Grant
    Filed: February 21, 1975
    Date of Patent: July 18, 1978
    Inventor: Robert Wayne Spears
  • Patent number: 4073312
    Abstract: A dual valve assembly having a charge and relief valve, comprising a unitary valve structure including a thick central body section and, extending therefrom, a pair of elongated hollow cylindrical valve members. A valve core is threaded into the bore of each valve member and a conventional valve cap is screwed onto the free end of one member, which end is adapted to be connected to an air source. A spring-biased plunger-cap or assembly is threaded onto the free end of the other valve member, the plunger being operable to engage the pin of the valve core at that end so as selectively to relieve the pressure. A passageway in the central section communicates with both of the bores and by a hose connection, with a pneumatic device whose operation is to be controlled.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: February 14, 1978
    Assignee: National Distillers and Chemical Corporation
    Inventors: Frank J. Voos, David M. Magoulick