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Class Information
Number: 137/625.62
Name: Fluid handling > Systems > Multi-way valve unit > Supply and exhaust > Pilot-actuated > Variable orifice-type modulator > Opposed orifices; interposed modulator
Description: Device having two lines, each having an opening discharging toward the other, and wherein the restrictor is located between the orifices and movable to lower the pressure in one line and increase the pressure in the other.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8522821 Torque motor linearization Sep. 3, 2013
8322375 Control device and hydraulic pilot control Dec. 4, 2012
8302629 Valve unit Nov. 6, 2012
7631663 Pilot valve Dec. 15, 2009
7458394 Methods and apparatus for mechanically adjusting a null offset in a torque motor of a servovalve Dec. 2, 2008
7210500 Methods and apparatus for mechanically adjusting a null offset in a torque motor of a servovalve May. 1, 2007
7093607 Methods and apparatus for maintaining pressure gain in a servovalve assembly Aug. 22, 2006
6755205 Method to stabilize a nozzle flapper valve Jun. 29, 2004
6648014 Fluid control valve and plate with filter Nov. 18, 2003
6367250 Shape memory alloy actuator Apr. 9, 2002
6273135 Fuel flow control apparatus Aug. 14, 2001
6227247 Position driven hot gas proportional thruster valve May. 8, 2001
6151897 Shape memory alloy actuator Nov. 28, 2000
5845667 Single stage variable force solenoid pressure regulating valve Dec. 8, 1998
5709245 Optically controlled actuator Jan. 20, 1998
5697401 Hydraulic servovalve Dec. 16, 1997
5533551 Pressure regulating servovalve Jul. 9, 1996
5244002 Spool position indicator Sep. 14, 1993
5240041 Synthesized flow-control servovalve Aug. 31, 1993
5197516 Hydraulic servo valve with controlled disengagement feature Mar. 30, 1993
5186213 29 Feb. 16, 1993
5165448 Two-stage servovalve with compensatoin circuit to accommodate "dead zone" d u Nov. 24, 1992
5102161 Semi-active suspension system with energy saving valve Apr. 7, 1992
5035254 Power transmission Jul. 30, 1991
5027858 Multistage servovalves Jul. 2, 1991
5027856 Electrohydraulic signal converter Jul. 2, 1991
4997002 Power transmission Mar. 5, 1991
4938249 Chip tolerant flapper Jul. 3, 1990
4922964 Servovalve construction May. 8, 1990
4922963 Hydraulic servovalve May. 8, 1990
4907615 High frequency response servovalve with electrical position feedback element structure and method Mar. 13, 1990
4883091 Multi-port self-regulating proportional pressure control valve Nov. 28, 1989
4761575 Servo-valve and a control motor therefor Aug. 2, 1988
4705059 Electrofluidic transducer of the nozzle/plate type and hydraulic servo-valve equipped with such a transducer Nov. 10, 1987
4682063 Control motor for a servo valve Jul. 21, 1987
4624284 Servovalve Nov. 25, 1986
4623003 Hydraulically actuated spool valve Nov. 18, 1986
4617966 Electromagnetic positioner for a servovalve or the like Oct. 21, 1986
4609012 Servo valve Sep. 2, 1986
4585029 Electro-hydraulic servo valve Apr. 29, 1986
4569272 Power transmission Feb. 11, 1986
4538633 Optical-hydraulic control system Sep. 3, 1985
4513782 Electrohydraulic servovalve device Apr. 30, 1985
4492245 Nozzle and flapper with squeeze film damping Jan. 8, 1985
4456031 Electro-hydraulic servo valve system Jun. 26, 1984
4352367 Electro-hydraulic control structure Oct. 5, 1982
4335645 Fluidic repeater Jun. 22, 1982
4333498 Stepper motor actuated servovalve Jun. 8, 1982
4265272 Transient start-up eliminator for pressure piloted valve May. 5, 1981
4232517 Exhaust gas control actuator Nov. 11, 1980

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