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Class Information
Number: 137/625.64
Name: Fluid handling > Systems > Multi-way valve unit > Supply and exhaust > Pilot-actuated > Electric
Description: Device in which the pilot valve is operated by electric motive means.










Patents under this class:
1 2 3 4 5 6 7 8 9 10 11

Patent Number Title Of Patent Date Issued
8678033 Proportional valve employing simultaneous and hybrid actuation Mar. 25, 2014
8662109 Proportional pressure control valve Mar. 4, 2014
8651140 Valve arrangement for different flow rate categories Feb. 18, 2014
8640723 First-stage pilot valve Feb. 4, 2014
8590571 Latching valve Nov. 26, 2013
8567443 Spool-type selector valve Oct. 29, 2013
8567442 Soft start device for pneumatic systems and method for the operation of a soft start device Oct. 29, 2013
8522821 Torque motor linearization Sep. 3, 2013
8474486 Actuator system Jul. 2, 2013
8474487 Latching valve Jul. 2, 2013
8464757 Hydraulic valve device Jun. 18, 2013
8453678 Piloted poppet valve Jun. 4, 2013
8439329 Method and device for operating an electropneumatic valve May. 14, 2013
8430125 Combined control valve and coupler Apr. 30, 2013
8430127 Electrohydraulic control module Apr. 30, 2013
8418724 Solenoid valve Apr. 16, 2013
8418722 Pressure-regulator servovalve with reduced leakage rate Apr. 16, 2013
8413679 Modular control device, especially of an electro-fluidic type Apr. 9, 2013
8397758 Valve Mar. 19, 2013
8387644 Solenoid operated fluid control valve Mar. 5, 2013
8375989 Method of operating a control valve assembly for a hydraulic system Feb. 19, 2013
8376314 Methods and apparatus to exclude function fluid or seawater from solenoid armature cavities in subsea or surface solenoid valves Feb. 19, 2013
8375992 Adjustable pressure control valves Feb. 19, 2013
8371335 Solenoid valve assembly Feb. 12, 2013
8347921 Parallel type valve assembly Jan. 8, 2013
8316757 Hydraulic control valve assembly with monolithic body and single spool port lock Nov. 27, 2012
8312895 Solenoid valve device Nov. 20, 2012
8307902 Downhole flow control tool and method Nov. 13, 2012
8267120 Control valve assembly for load carrying vehicles Sep. 18, 2012
8244407 Method for actuating a hydraulic servo system Aug. 14, 2012
8220478 Fluid flow control apparatus Jul. 17, 2012
8191579 Directional or flow control valve Jun. 5, 2012
8172197 Fast-acting pneumatic diaphragm valve May. 8, 2012
8156960 Servo pressure control valve Apr. 17, 2012
8118058 Variable frequency and amplitude dither for electronically controlled valves Feb. 21, 2012
8091584 Actuator position control device using a fail freeze servo-valve Jan. 10, 2012
8082952 Piezoelectric bending element actuator for servo valve Dec. 27, 2011
8061379 Manifold solenoid valve Nov. 22, 2011
8015991 Manifold-type solenoid valve apparatus having stop valve Sep. 13, 2011
8001993 Dead band reduction in electronically controlled valves Aug. 23, 2011
7980269 Control valve assembly for load carrying vehicles Jul. 19, 2011
7963185 Stepper motor driven proportional actuator Jun. 21, 2011
7958909 Spool valve Jun. 14, 2011
7926512 Stepper motor driven proportional fuel metering valve Apr. 19, 2011
7849956 On-demand electro-hydraulic steering system Dec. 14, 2010
7841360 Valve, especially proportional pressure control valve Nov. 30, 2010
7832427 Control valve arrangements Nov. 16, 2010
7779853 Proportional pressure control valve Aug. 24, 2010
7775240 Spool valve Aug. 17, 2010
7753076 Electromagnetic valve Jul. 13, 2010

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