Flow Rate Responsive Patents (Class 137/115.03)
  • Patent number: 10641298
    Abstract: A hydraulic control valve maintains the pressure at a control port at a desired percentage of the pressure at two other ports as the pressure at the two other ports varies. Upon the pressure at the control port reaching a predetermined pressure setting, a fourth port will open to maintain the control port at a second desired percentage of the two other ports.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: May 5, 2020
    Assignee: HydraForce, Inc.
    Inventors: Travis Schmidt, Scott Parker, Joel Mekkes
  • Patent number: 10598288
    Abstract: A fluid control valve having a body, a seat ring, a valve cage adjacent the seat ring, a first valve plug assembly positioned within the valve cage, and a second valve plug assembly positioned within an axial bore of the first valve plug assembly. The first valve plug assembly has radial apertures in fluid communication with the axial bore and a first valve plug including the axial bore and a throttling port in fluid communication with the axial bore. The first valve plug assembly is movable between a closed position, in engagement with the seat ring, and an open position, spaced apart from the seat ring. The second valve plug assembly has a second valve plug that is movable between a closed position, in engagement with the first valve plug, and an open position, spaced apart from the first valve plug.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: March 24, 2020
    Assignee: EMERSON PROCESS MANAGEMENT (TIANJIN) VALVES CO., LTD.
    Inventors: Bin Wang, Qiyong Zhou
  • Patent number: 10421775
    Abstract: A precision volumetric liquid dispensing instrument is disclosed that includes two pressure sensors and a fluid passageway with a defined volume portion in communication with the two sensors for receiving and distributing liquid in relatively small volumes. One of the pressure sensors is positioned to measure pressure at one portion of the defined volume portion of the fluid passageway and the other of the gas pressure sensors is positioned to measure gas pressure at a different portion of the defined volume portion of the passageway. At least one valve is in communication with the passageway for moving fluids into or out of the defined volume portion of the fluid passageway, and a processor carries out a step selected from the group consisting of (i) calculating the volume of the liquid based upon the measured pressure and (ii) metering a liquid into the defined volume portion of the fluid passageway until the measured pressure indicates that a desired volume of fluid is in the fluid passageway.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: September 24, 2019
    Assignee: CEM Corporation
    Inventors: David L. Herman, Joseph J. Lambert
  • Patent number: 10408356
    Abstract: A beverage dispensing valve includes a housing defining a chamber with an inlet for receiving a fluid and an outlet for dispensing the fluid. A piston is located in the chamber and subjected to a fluid pressure exerted by the fluid received via the inlet. The piston is moved axially in the chamber by the fluid pressure such that the piston determines a flow characteristic of the fluid dispensed via the outlet. A plunger is received in the chamber, and the fluid pressure tends to move the piston towards the plunger. A spring tends to move the piston away from the plunger, against the fluid pressure. The plunger is axially registered in the chamber in discrete plunger positions, and each plunger position sets a discrete limit on axial movement of the piston thereby determining a predetermined flow characteristic of the fluid dispensed via the outlet.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: September 10, 2019
    Assignee: Cornelius, Inc.
    Inventors: Brian Mastro, Hansel Sjukur, E. Scott Sevcik
  • Patent number: 10215291
    Abstract: A regulating device may include a housing that defines an inlet chamber and an outlet chamber, with a flow restriction seat between the inlet chamber and the outlet chamber. A flow restriction valve is movable relative to the flow restriction seat to adjust the flow between the inlet chamber and the outlet chamber of the regulating device. A servo valve having a servo chamber may be used to adjust the position of the flow restriction valve. The servo chamber may be fluidly coupled to the inlet chamber though a fixed flow restriction and to the outlet chamber though an adjustable flow restriction. A stepper motor may be used to adjust the servo valve to adjust the adjustable flow restriction between the servo chamber and the outlet chamber. This causes a change of the servo pressure, which moves the flow restriction valve and adjusts the flow of the regulating device.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: February 26, 2019
    Assignee: Honeywell International Inc.
    Inventor: Willem Super
  • Patent number: 10087934
    Abstract: A vane compressor includes a housing having therein a suction chamber, a discharge chamber having a cover, and a rotor chamber, a rotor having therein a plurality of vane slots, and a plurality of vanes. The housing includes a partition that has a first surface forming the other surface of the rotor chamber and a second surface and separates the rotor chamber from the discharge chamber. An intermediate pressure chamber having a pressure that is lower than the discharge chamber and higher than the suction chamber is formed between the partition and the cover. A part of the second surface and a part of a covering surface of the discharge chamber cover are spaced away from each other by the intermediate pressure chamber. The intermediate pressure chamber is disposed so as to overlap at least a part of the other surface of the rotor chamber.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: October 2, 2018
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hiroki Nagano, Tatsushi Mori, Kunihisa Matsuda, Yuya Hattori
  • Patent number: 10030817
    Abstract: A control arrangement for supplying a plurality of hydrostatic actuators includes a pump with an output connected to a circulating line that opens into a tank. The control arrangement has a metering port and an individual pressure compensator for each actuator. The individual pressure compensators are connected in series by the circulating line. Some of the pressure medium are configured to be branched off from the circulation channel for the respective actuator by the individual pressure compensators and fed to the metering port disposed downstream of the individual pressure compensator. The pressure medium that is not required is forwarded from each individual pressure compensator into the circulating line and is fed back from the last individual pressure compensator to the tank by the circulating line. The actuators are prioritized based on the order of their individual pressure compensators and move independently of the load pressure without expensive load sensing lines.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: July 24, 2018
    Assignee: Robert Bosch GmbH
    Inventor: Christoph Keyl
  • Patent number: 9914353
    Abstract: A valve configured for use with a fuel tank can have a floating main valve housed within a valve body. The valve body can define a first port fluidly connected to the fuel tank, a second port fluidly connected to a tank venting system of the fuel tank and a third port fluidly connected to the filler neck. The solenoid can be configured on the check valve. The solenoid can have a pin configured to extend into the valve body and engage the floating main valve in a locked position.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: March 13, 2018
    Assignee: Eaton Corporation
    Inventors: Stefan Walter, Jeffrey Smith, Steven Ambrose, Mustafa Huseyin, Raymond Bruce McLauchlan
  • Patent number: 9777844
    Abstract: A valve, in particular a pilot-operated proportional directional poppet valve, has a valve housing (7) with a fluid inlet (21) and a fluid outlet (23). The fluid stream between the fluid inlet (21) and the fluid outlet (23) is adjustable by a main piston (27). A pilot valve chamber (37) provided on a rear face (29) of the main piston (27) has a pilot valve closing member (33) movable by an actuating device (69). By closing member (33) the fluid stream between the pilot valve chamber (37) and the fluid outlet (23) can be adjusted. An inlet aperture (3) is arranged between the fluid inlet (21) and the pilot valve chamber (37). A maximum volumetric flow controller (5) is in the main piston (27) in an outflow between the pilot valve chamber (37) and the fluid outlet (23).
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: October 3, 2017
    Assignee: HYDAC FLUIDTECHNIK GMBH
    Inventors: Peter Bruck, Markus Bill
  • Patent number: 9764636
    Abstract: A valve configured for use with a fuel tank can have a floating main valve housed within a valve body. The valve body can define a first port fluidly connected to the fuel tank, a second port fluidly connected to a tank venting system of the fuel tank and a third port fluidly connected to the filler neck. The solenoid can be configured on the check valve. The solenoid can have a pin configured to extend into the valve body and engage the floating main valve in a locked position.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: September 19, 2017
    Assignee: Eaton Corporation
    Inventors: Stefan Walter, Jeffrey Smith, Steven Ambrose, Mustafa Huseyin, Raymond Bruce McLauchlan
  • Patent number: 9669533
    Abstract: A valve includes a valve body, an inlet orifice in fluid communication with a first fluid volume, an outlet aperture in fluid communication with a second fluid volume and in selective fluid communication with the inlet orifice by a first fluid flow path, an activation member axially movable relative to the valve body, and a plunger axially movable within the valve body. The plunger includes an aperture therethrough defining a second fluid flow path between the first and second fluid volumes. The valve is operable in a first mode in which fluid flow is only permitted along the first fluid flow path in response to manual actuation of the activation member. The valve is operable in a second mode in which fluid flow is only permitted along the second fluid flow path when a pressure difference between the first and second fluid volumes reaches a predetermined value.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: June 6, 2017
    Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
    Inventor: James O. Myrhum, Jr.
  • Patent number: 9664291
    Abstract: A valve, in particular a pilot-operated proportional directional poppet valve, has a valve housing (7) with a fluid inlet (21) and a fluid outlet (23). The fluid stream between the fluid inlet (21) and the fluid outlet (23) is adjustable by a main piston (27). A pilot valve chamber (37) on a rear face (29) of the main piston (27) has a pilot valve closing member (33) movable by an actuating device (69) to adjust the fluid stream between the pilot valve chamber (37) and the fluid outlet (23). A supply aperture (3) is between the fluid inlet (21) and the pilot valve chamber (37). The opening cross-section of the supply aperture (3) can be reduced by a control element (49).
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: May 30, 2017
    Assignee: HYDAC FLUIDTECHNIK GMBH
    Inventors: Peter Bruck, Markus Bill
  • Patent number: 9498377
    Abstract: An ophthalmic surgical device (10) includes a housing (12) having a distal end (14) and a proximal end (16). A cannula (18) is attached to the housing distal end (14) and has a distal tip (20) with at least one port (22) in communication with a lumen (19) extending through the cannula (18) and in communication with an aspiration path (24) in the housing (12). A vibration source (26) is held within the housing (12) for vibrating the distal tip (20) for assisting in vitreous and other tissue removal. An aspiration source (152) connected to the aspiration path (24) for applying a negative pressure to the lumen (19) and the at least one port (22) for removing fluids and the vitreous and other tissue from the eye. The vibration source (26) and the aspiration source (152) together create a periodic bi-directional flow of tissue through the port (22) without creating cavitation externally of the distal tip (20).
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: November 22, 2016
    Assignee: Bausch & Lomb Incorporated
    Inventors: Brian D. McCary, Toh Seng Goh, James Taylor Perkins
  • Patent number: 8983667
    Abstract: A system is provided to control fluid flow in a wastewater treatment system through wastewater level manipulation. The wastewater treatment system may include a wastewater treatment plant connected to a plurality of pump stations by a main. Each of the plurality of pump stations may include a wet well with a pump therein. The system may include a central server in communication with a sensor to sense a level of wastewater within the wet well. The pump may be automatically moved to an on position when the level of the wastewater in the wet well is at or above a first level and may be automatically moved to an off position when the level of the wastewater in the respective wet well is at or below a pump cutoff level. The central server may systematically manipulate the first level to selectively set the level of wastewater within the wet well.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: March 17, 2015
    Assignee: Data Flow Systems, Inc.
    Inventor: Thomas F. Smaidris
  • Patent number: 8973598
    Abstract: A priming valve device for a beverage machine. The device includes a casing assembly including a water inlet, a water outlet, and a drain and venting portion for discharging water or air during priming and a valve assembly associated with the casing assembly. The valve assembly includes a valve member which is moveable to a closed position which closes the water outlet by elastic return when the pressure in the water inlet decreases under the elastic return pressure of the valve member.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: March 10, 2015
    Assignee: Nestec S.A.
    Inventors: Stefan Etter, Sandro Zingg
  • Patent number: 8919094
    Abstract: A fuel metering system includes a bypass valve configured to receive a fuel flow under a pressure P1, a pressure regulating valve in fluid communication with the bypass valve and configured to receive a fuel flow under a pressure PQ, a metering valve in fluid communication with the bypass valve and the pressure regulating valve, and configured to receive the fuel flow under the pressure P1 and to output a fuel flow under a pressure P2, a single stage servo valve in fluid communication with the bypass valve, the pressure regulating valve and the metering valve, and configured to receive the fuel flow under the pressure P1, and to output the fuel flow under the pressure PQ, and to output a fuel flow under a pressure PM, and a linear variable differential transformer coupled to the metering valve.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: December 30, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Todd Haugsjaahabink
  • Patent number: 8752541
    Abstract: A heating system can include certain pressure sensitive features. These features can be configured to change from a first position to a second position based on a pressure of a fuel flowing into the feature. These features can include, fuel selector valves, pressure regulators, burner nozzles, and oxygen depletion sensor nozzles, among other features.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: June 17, 2014
    Inventor: David Deng
  • Patent number: 8616858
    Abstract: A hydraulic system, including fluid flow generated by a primary pump and a secondary pump, utilizes a regulator control assembly to control fluid flow from each of the primary and secondary pumps such that a desired fluid flow and pressure is maintained at the outlet for varying actuator demands. The regulator control assembly controls the transition from using only the primary pump, to using both the primary and secondary pumps to provide a desired fluid flow and pressure through the outlet to the actuator.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: December 31, 2013
    Assignee: United Technologies Corporation
    Inventor: Jason E. Rosner
  • Patent number: 8600568
    Abstract: A system is provided to control fluid flow in a wastewater treatment system. The wastewater treatment system may include a wastewater treatment plant and a main that connects a plurality of pump stations to the wastewater treatment plant. Each of the plurality of pump stations may include a wet well and a pump carried by the wet well to pump the wastewater. The system may include a central server and a sensor in communication with the central server to sense a level of wastewater within the wet well. The pump may be moved to an on position when the level of the wastewater in the wet well is at or above a first level. The level of wastewater within the wet well may be systematically manipulated responsive to the central server to control the fluid flow in the wastewater treatment system.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: December 3, 2013
    Assignee: Data Flow Systems, Inc.
    Inventor: Thomas F. Smaidris
  • Patent number: 8485212
    Abstract: A volume flow regulating valve for a hydraulic system for controlling a belt-driven conical-pulley transmission. The valve includes a control piston with a pressure surface and an oppositely facing pressure return surface. A supply segment is associated with the pressure surface, and a cooler return segment is connectable with the supply segment by a control edge of the control piston. A pressure return segment is associated with the pressure return surface, and a pressurizing segment is situated between the cooler return segment and the pressure return segment.
    Type: Grant
    Filed: July 12, 2008
    Date of Patent: July 16, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Roshan Willeke, Eric Müller
  • Publication number: 20120167997
    Abstract: A coupling and switching unit for transporting a gas-containing fluid includes at least one line having at least one coupling device. The at least one line is configured as a feed line for a gas/liquid mixture. A branched-off line is arranged at the end of the at least one line. The branched-off line is configured to direct the liquid/gas mixture towards an outflow. A throttle valve is arranged in the branched-off line. A valve is configured to control a discharge of a main flow of the gas/liquid mixture.
    Type: Application
    Filed: August 16, 2010
    Publication date: July 5, 2012
    Inventors: Karl August Brensing, Michael Dedenbach, Rainer Kluth
  • Patent number: 8127787
    Abstract: A siphon breaker includes a housing having a gas inlet and a gas outlet. The siphon breaker includes a stop valve adapted to transition from a closed position in which gas is substantially prevented from entering the gas inlet, and an open position in which gas is introduced into the gas inlet. The siphon breaker includes a control valve having a control valve gas inlet, a control valve gas outlet, and an electrically operated actuator. The control valve is adapted to transition from a closed position in which gas is substantially prevented from entering the control valve gas inlet, to an open position in which gas is through the control valve gas inlet.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: March 6, 2012
    Assignee: GA Industries, LLC
    Inventors: Grant A. Colton, Sr., Joseph E. Lescovich
  • Patent number: 8091575
    Abstract: A valve system for monitoring and controlling a flow of a fluid additive into a main fluid line is disclosed. The system includes a pump that provides a constant flow of the additive from a fluid reservoir through a supply conduit into the main fluid line. A portion of the fluid additive may be diverted into one or more return conduits leading back to the reservoir by opening a solenoid actuated valve in the return conduit. Flow meters are employed to detect the flow rates of the fluids in the supply conduit and the main fluid line. The flow meters provide signals to a control system, which are effective to control the operation of the solenoid actuated valves to maintain a desired flow of the additive into the main fluid line.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: January 10, 2012
    Assignee: Gammon Technical Products, Inc.
    Inventor: James H. Gammon
  • Patent number: 7766084
    Abstract: A downhole tool (10) comprises a body (12) defining a bore. The body includes a valve arrangement (18) including flow ports (24) in the wall of the body. The ports may be opened or closed. In addition, a variable flow restriction (30) is provided in the bore (14), the degree of restriction tending to decrease as flow across the restriction increases. The variable flow restriction may be utilized to actuate the valve arrangement.
    Type: Grant
    Filed: November 17, 2004
    Date of Patent: August 3, 2010
    Assignee: Churchill Drilling Tools Limited
    Inventor: Andrew Phillip Churchill
  • Patent number: 7678177
    Abstract: A membrane air dryer includes a proportioning valve for providing sweep air to the dryer. The valve may be located in an easily accessible location and may be oriented so that the movable valve element extends transverse to the length of the shell. The valve may be configured to allow air to flow back from the delivery port to the fibers during a compressor unload cycle to maintain pressure on the fibers, while blocking flow of air from the delivery port to the sweep chamber.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: March 16, 2010
    Assignee: New York Air Brake Corporation
    Inventor: Randall W. Nichols
  • Publication number: 20090297280
    Abstract: A fluid diversion conduit is provided for temporarily diverting a stream during pipeline construction activities. The conduit includes an offset section that is shiftable to adjust access to the streambed, for example to allow pipeline installation across the streambed. When construction activities are obstructed by the initial position of the offset segment, the offset segment may be shifted, for example by rotation to elevate the offset segment from the streambed. Further construction activities may proceed beneath the elevated section, and pipelayers can pass under it while carrying the pipe string into position. Flow through the conduit may be maintained by siphon hydraulics or by pumps when the offset segment is elevated.
    Type: Application
    Filed: June 4, 2008
    Publication date: December 3, 2009
    Inventor: Todd McBride
  • Publication number: 20080188991
    Abstract: A method for monitoring a fluid supply system includes detecting a fluid flow through the fluid supply system, and monitoring at least a length of time the fluid flow has flown without interruption, a total volume of the fluid flow that has flown, and a flow rate of the fluid flow in response to detection of the fluid flow.
    Type: Application
    Filed: February 5, 2008
    Publication date: August 7, 2008
    Inventors: Timothy David Mulligan, David Millar, Aaron Ross London, Lindon Alford Baker, Richard Alan Gros
  • Patent number: 7249608
    Abstract: The flow control device comprises a supply passage (2) for supplying hydraulic fluid discharged by a pump (1) to a power steering output section (8); a variable throttle section (3) situated at an intermediate position of the supply passage (2); and a flow control valve (4) for returning the hydraulic fluid in the supply passage (2) to the pump inlet side, in accordance with a pressure differential between upstream and downstream of the variable throttle section (3). When the pump (1) is halted, the flow control valve (4) is impelled by a spring (13) and closes the variable throttle section (3). A throttle passage (51) is provided for connecting the upstream side and the downstream side of the variable throttle section with the supply passage (2).
    Type: Grant
    Filed: October 7, 2004
    Date of Patent: July 31, 2007
    Assignee: Kayaba Industry Co., Ltd
    Inventors: Tetsuji Hayashi, Tsunefumi Arita, Hideyasu Ihira
  • Patent number: 7195028
    Abstract: A self-contained oxygen generator containing a PSA unit and a flowmeter in the outlet line. The flowmeter provides a signal which represents the flow rate of the oxygen in the outlet line. A leakage circuit with a calibrated orifice and a solenoid valve are also located on the outlet line. In response to a signal from the flowmeter, the solenoid can be actuated so as to provide a calibrated leakage at the outlet of the PSA. This calibrated leakage is useful when overall oxygen usage is too low.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: March 27, 2007
    Assignee: L'Air Liquide, Société Anonyme Á Directoire et Conseil de Surveillance pour l'Étude Et l'Exploitation des Procedes Georges Claude
    Inventors: Chrystelle Basset, Philippe Jean, Nicolas Schmutz
  • Patent number: 7063100
    Abstract: A flow regulator with pressure relief combination valve is disclosed which can include a housing and a valve assembly. The housing can have a chamber and four ports. A cage, having a plurality of cross holes, is supported by the housing. A hollow spool is slidably disposed within the cage and is biased to engage the cage. A shoulder of the cage and a counterbore of the spool cooperate to interferingly retain an insert. A poppet is slidably disposed inside of the cage. The valve assembly includes an adaptor, a spring disposed within the adaptor, a guide disposed between the spring and the poppet, and an adjuster adjustably secured to the adaptor. The spring is arranged to bias the poppet against a seat via the guide. The adjustor is movable to adjust the position of the spring.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: June 20, 2006
    Assignee: HydraForce Inc.
    Inventor: Zilek Liberfarb
  • Patent number: 6908377
    Abstract: An explosion protection venting system has a plurality of vessels or reactors connected by a common vent line. A flame front diverter having a pair of opposing rupturable discs is connected to each one of a plurality of vessels for directing a deflagration away from the normal flow path and through an alternate path that prevents damage to nearby structure.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: June 21, 2005
    Assignee: Eastman Kodak Company
    Inventors: Robert C. Knyrim, Timothy F. Simmons
  • Patent number: 6871661
    Abstract: A combination fitting for flow control devices in an automotive power steering system having channels disposed in the fluid receiving end of the fitting.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: March 29, 2005
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Timothy Staton, Shawn P. Capser, Kevin S. Bockstanz
  • Patent number: 6799599
    Abstract: The invention relates to a valve that comprises at least one pump connection (10), one tank connection (14) and one consumer connection (18), and a valve piston (22) that is displaced within the valve box (12). Said valve piston separates the pump connection (10) from the tank connection (14) in at least one blocked position and interacts with an energy accumulator (24). A fluid stream that flows between the consumer connection (18) and the tank connection (14) is controlled by means of a control device (26). The control device (26) is configured as a fluid stream control that is integrated in the valve piston (22) and that allows, contrary to known valves which use a diaphragm construction, reduction, by a constant value, of the volume flow to the consumer in a load-independent manner, thereby allowing for a proportional load-independent control.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: October 5, 2004
    Assignee: Hydac Fluidtechnik GmbH
    Inventor: Alois Hoffmann
  • Publication number: 20030178060
    Abstract: The invention relates to a valve that comprises at least one pump connection (10), one tank connection (14) and one consumer connection (18), and a valve piston (22) that is displaced within the valve box (12). Said valve piston separates the pump connection (10) from the tank connection (14) in at least one blocked position and interacts with an energy accumulator (24). A fluid stream that flows between the consumer connection (18) and the tank connection (14) is controlled by means of a control device (26). The control device (26) is configured as a fluid stream control that is integrated in the valve piston (22) and that allows, contrary to known valves which use a diaphragm construction, reduction, by a constant value, of the volume flow to the consumer in a load-independent manner, thereby allowing for a proportional load-independent control.
    Type: Application
    Filed: February 13, 2003
    Publication date: September 25, 2003
    Inventor: Alois Hoffmann
  • Patent number: 6581623
    Abstract: An auto-switching sub-atmospheric pressure gas delivery system, for dispensing gas to a gas-consuming process unit, e.g., a semiconductor manufacturing tool, without the occurrence of pressure spikes or flow perturbations.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: June 24, 2003
    Assignee: Advanced Technology Materials, Inc.
    Inventors: Kent Carpenter, James Dietz
  • Publication number: 20030102027
    Abstract: A spool 33 provided with a flange 39 is inserted in a spool bore 32, and a pressing force of a spring 52 is always applied through the flange 39 to the spool 33 at its one end in a second pressure chamber 35. A fluid groove 60 is formed in an inner peripheral surface of the spool bore 32 at a position near an abutment surface 51. A hydraulic fluid under the same pressure P2 as that in the second pressure chamber 35 is introduced to the fluid groove 60 through a fluid passage 61 formed in a valve body 31. When the flange 39 and the abutment surface 51 are in contact with each other, the hydraulic fluid is allowed to enter the interface between them through the fluid groove 60. A rise of the cracking pressure, which occurs upon the flange coming into tightly close contact with the abutment surface, can be prevented without reducing the strength of the flange 39, and stable opening/closing characteristics of the spool 33 can be achieved.
    Type: Application
    Filed: January 17, 2002
    Publication date: June 5, 2003
    Inventors: Mitsuhisa Tougasaki, Yoshizumi Nishimura, Yusaku Nozawa, Kinya Takahashi
  • Patent number: 6289919
    Abstract: A valve (20B) is provided is provided for regulating the pressure differential between a high pressure side (16) and a low pressure side (18) of a fluid system component (14). The valve (20B) utilizes a damping washer (60) to restrict the flow of fluid from a valve bore (32) in response to translation of a valve spool (30) in the valve bore (32). The damping washer (60) includes an aperture (78) that is piloted on a valve stem (41) extending from the valve spool (30). The damping washing (60) is biased against an open end (66) of the valve bore (32) by a spring (62) engaged between the damping washer (60) and a spring seat (48) that is engaged with the valve stem (41). A separate spring (46) is provided to bias the valve spool (30) against the high pressure fluid acting on the valve spool (30).
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: September 18, 2001
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Mike Sledd, David Ripley
  • Patent number: 6182503
    Abstract: On-line rheological measurements are made on a process flowing material, such as a polymer melt, utilizing a rheometer of the type in which an inlet pump delivers a relatively large volumetric flow of diverted process material from a process main stream to an inlet site located in very close proximity to the entrance of a capillary passage, and a metering pump draws a smaller portion of the volumetric flow of the diverted material from the inlet site through the capillary passage for return to the process main stream. The viscosity of the diverted material is measured as a function of the rate of flow of the material through the capillary passage and the pressure drop between spaced apart locations along the capillary passage.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: February 6, 2001
    Assignee: Rheometric Scientific, Inc.
    Inventors: Paul G. Mode, Ronald F. Garritano
  • Patent number: 6170508
    Abstract: A valve for regulating the rate of flow and/or the pressure of oil flowing to a transmission or another consumer in the power train of a motor vehicle has a piston which defines with the valve housing a chamber for one or more springs and for oil being admitted through a first inlet by way of a first conduit containing a first throttle. A second inlet admits pressurized oil from a pump, and such oil can be admitted into the consumer by way of a first outlet and a second conduit containing a second throttle and supplying oil to the first conduit. A second outlet can deliver oil from the second inlet to the sump in response to shifting of the piston. A hydraulic seal is established between the piston and the housing intermediate the chamber and the second outlet to prevent leakage of oil from the chamber into the second outlet. Oil leaking from the chamber could adversely influence the characteristics of oil flowing into the consumer.
    Type: Grant
    Filed: July 7, 1999
    Date of Patent: January 9, 2001
    Assignee: LuK Getriebe-Systeme GmbH
    Inventors: Hartmut Faust, Benjamin Kemmner, G{umlaut over (u)}nter Ebinger, Urban Panther, Manfred Homm