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Class Information
Number: 137/625.63
Name: Fluid handling > Systems > Multi-way valve unit > Supply and exhaust > Pilot-actuated > Common to plural valve motor chambers
Description: Device in which a single pilot valve controls a plurality of valve actuating motor chambers.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8640723 First-stage pilot valve Feb. 4, 2014
8474486 Actuator system Jul. 2, 2013
8464755 Hydraulic control arrangement for controlling a variable fluid volume flow Jun. 18, 2013
8454126 Print head with electromagnetic valve assembly Jun. 4, 2013
8453678 Piloted poppet valve Jun. 4, 2013
8418722 Pressure-regulator servovalve with reduced leakage rate Apr. 16, 2013
8186158 Variable turbo supercharger and method of driving the same May. 29, 2012
8091584 Actuator position control device using a fail freeze servo-valve Jan. 10, 2012
7946310 System for controlling a plurality of turbomachine discharge valves May. 24, 2011
7735517 Rotary-actuated electro-hydraulic valve Jun. 15, 2010
7735518 Valve assembly with dual actuation solenoids Jun. 15, 2010
7726340 Flexible, hermetic pivot seal for torque motor Jun. 1, 2010
7455074 Latchable electrohydraulic servovalve Nov. 25, 2008
7380571 Directional control valve Jun. 3, 2008
7290565 Methods and apparatus for splitting and directing a pressurized fluid jet within a servovalve Nov. 6, 2007
7093607 Methods and apparatus for maintaining pressure gain in a servovalve assembly Aug. 22, 2006
6736046 Pilot control valve utilizing multiple offset slide valves May. 18, 2004
6640833 Fail-freeze servovalve Nov. 4, 2003
6637461 Electrically operated hydraulic actuator with force feedback position sensing Oct. 28, 2003
6598622 Directional valve Jul. 29, 2003
6543481 Pilot operated pneumatic valve Apr. 8, 2003
6527010 Single pilot dual pulse spool valve Mar. 4, 2003
6431046 Pneumatic motor Aug. 13, 2002
6382934 Reversing valve for a compressed air membrane pump May. 7, 2002
6192937 Pilot operated pneumatic valve Feb. 27, 2001
6109284 Magnetically-latchable fluid control valve system Aug. 29, 2000
6039077 Electrohydraulic control valve arrangement Mar. 21, 2000
5896890 Pilot-operated servo-valve Apr. 27, 1999
5848612 Servovalve employing a rotatable feedback linkage Dec. 15, 1998
5832808 Directional control valve unit Nov. 10, 1998
5806565 Hydraulic valves Sep. 15, 1998
5607290 Air driven diaphragm pump Mar. 4, 1997
5573036 Electro-hydraulic servovalve having mechanical feedback Nov. 12, 1996
5558126 Double solenoid type electromagnetic valve Sep. 24, 1996
5553827 Low current electro-hydraulic metering module Sep. 10, 1996
5545099 Shift control valve of a hydraulic control system for automatic transmission Aug. 13, 1996
5538042 Air driven device Jul. 23, 1996
5520217 Directional valve May. 28, 1996
5445188 Pilot operated servo valve Aug. 29, 1995
5377719 Pneumatic valve, particularly for control of compressed-air-operated membrane pumps Jan. 3, 1995
5353685 Redundant fluidic multiplexer Oct. 11, 1994
5303727 Fluidic deflector jet servovalve Apr. 19, 1994
5279121 Flow control valve with pilot operation and pressure compensation Jan. 18, 1994
5156189 High flow control valve Oct. 20, 1992
5135030 Electrohydraulic control system Aug. 4, 1992
5129425 Valve control system Jul. 14, 1992
4972762 Warm-up circuit for hydraulic pilot control system Nov. 27, 1990
4907615 High frequency response servovalve with electrical position feedback element structure and method Mar. 13, 1990
4858649 Valve apparatus Aug. 22, 1989
4844125 Electrically-operable fluid control valve Jul. 4, 1989

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