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Class Information
Number: 137/625.68
Name: Fluid handling > Systems > Multi-way valve unit > Supply and exhaust > Reciprocating valve > Piston valve > With internal flow passage
Description: Device wherein the piston has a flow passage within it for the line fluid.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8684038 Slide-type pressure control valve having improved damping behavior Apr. 1, 2014
8684041 Control valve for a device for variably adjusting the valve timing for gas exchange valves in an internal combustion engine Apr. 1, 2014
8662109 Proportional pressure control valve Mar. 4, 2014
8656941 Flow control valve Feb. 25, 2014
8607823 Pressure control valve Dec. 17, 2013
8602060 Multiplexing control valve Dec. 10, 2013
8523535 Adjusting valve for adjusting the delivery volume of a displacement pump Sep. 3, 2013
8505507 Flow rate control valve Aug. 13, 2013
8505582 Hydraulic valve Aug. 13, 2013
8490654 Electromagnetic actuating unit Jul. 23, 2013
8453679 Hydraulic valve device Jun. 4, 2013
8434516 Three position solenoid valve May. 7, 2013
8434517 Control valve May. 7, 2013
8430125 Combined control valve and coupler Apr. 30, 2013
8408232 Sequence valve Apr. 2, 2013
8397758 Valve Mar. 19, 2013
8397759 Electromagnetic spool valve Mar. 19, 2013
8322376 Solenoid valve Dec. 4, 2012
8316889 Control valve for a camshaft adjuster Nov. 27, 2012
8272402 Sequential stepped directional control valve Sep. 25, 2012
8267121 Valve assembly for counteracting flow forces Sep. 18, 2012
8251189 Railway brake cylinder Aug. 28, 2012
8251097 Sliding valve Aug. 28, 2012
8251096 Slide valve Aug. 28, 2012
8225818 Hydraulic valve arrangement with an annular check valve element Jul. 24, 2012
8210206 Dual redundant servovalve Jul. 3, 2012
8210207 Directly piloted valve assembly Jul. 3, 2012
8156962 Microvalve device Apr. 17, 2012
8118059 Control valve for a camshaft adjuster Feb. 21, 2012
8118060 Valve part of a hydraulic control valve for controlling flows of pressurized medium Feb. 21, 2012
8104511 Sequential stepped directional control valve Jan. 31, 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
8011387 Pressure control device for heavy equipment Sep. 6, 2011
8006719 Electrohydraulic valve having a solenoid actuator plunger with an armature and a bearing Aug. 30, 2011
RE42633 Spool valve for fluid control Aug. 23, 2011
7980270 Spool valve apparatus and method Jul. 19, 2011
7938143 Fluid pressure control apparatus May. 10, 2011
7926513 Spool valve Apr. 19, 2011
7921879 Control valve for a hydraulic motor Apr. 12, 2011
7921878 Control valve with load sense signal conditioning Apr. 12, 2011
7909060 Pressure control valve Mar. 22, 2011
7841361 Electromagnetic hydraulic valve Nov. 30, 2010
7841360 Valve, especially proportional pressure control valve Nov. 30, 2010
7775241 Slide valve control device and a drive device for use with it Aug. 17, 2010
7743789 Valve for hydraulic braking of work machines or the like Jun. 29, 2010
7604022 Manual valve of hydraulic control system for continuously variable transmission Oct. 20, 2009
7600531 Valve with check valve Oct. 13, 2009
7581562 Hydraulic distributor with torque slits Sep. 1, 2009
7533695 Control valve for a device changing the control times of an internal combustion engine May. 19, 2009

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