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Class Information
Number: 137/625.67
Name: Fluid handling > Systems > Multi-way valve unit > Supply and exhaust > Reciprocating valve > Piston valve
Description: Device wherein the valve unit is a reciprocating piston.










Sub-classes under this class:

Class Number Class Name Patents
137/625.69 With annular passage (e.g., spool) 421
137/625.68 With internal flow passage 252


Patents under this class:

Patent Number Title Of Patent Date Issued
8691091 Aeration control valve system for water treatment system and methods for using same Apr. 8, 2014
8678340 Hydraulic control valve apparatus for automatic transmission Mar. 25, 2014
8651141 Electromagnetic valve and relative assembly method Feb. 18, 2014
8647075 Control valve for a variable displacement pump Feb. 11, 2014
8495976 Oil control valve and hydraulic control apparatus Jul. 30, 2013
8464756 Spool valve Jun. 18, 2013
8453678 Piloted poppet valve Jun. 4, 2013
8434516 Three position solenoid valve May. 7, 2013
8347921 Parallel type valve assembly Jan. 8, 2013
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
8210208 Electrically operated hydraulic valve Jul. 3, 2012
8167000 Balanced solenoid valve May. 1, 2012
8151824 Balanced solenoid valve Apr. 10, 2012
8104511 Sequential stepped directional control valve Jan. 31, 2012
8006718 Electric spool valve Aug. 30, 2011
RE42633 Spool valve for fluid control Aug. 23, 2011
7946310 System for controlling a plurality of turbomachine discharge valves May. 24, 2011
7841361 Electromagnetic hydraulic valve Nov. 30, 2010
7540230 Three-way poppet valve for work exchanger Jun. 2, 2009
7409967 Pattern former for wrapped bakery products and method for loading and unloading bakery products Aug. 12, 2008
7380570 Three-way valve for use with paintball markers Jun. 3, 2008
6827053 Camshaft control device and control valve with leakage compensation Dec. 7, 2004
6142181 3/3-way valve Nov. 7, 2000
6095192 Spool valve for fluid control Aug. 1, 2000
5800397 Angiographic system with automatic high/low pressure switching Sep. 1, 1998
4655253 Shut-off valve Apr. 7, 1987
4641686 Solenoid operated valve pressure balanced in a closed position by a single diaphragm Feb. 10, 1987
4637433 Solenoid valve Jan. 20, 1987
4526343 Device for the distribution of a fluid Jul. 2, 1985
4494442 Valve accentuation mechanism for opposed inverted V engine Jan. 22, 1985
4320782 Universal momentary contact diverter Mar. 23, 1982
4299397 Inflatable packer assembly with control valve Nov. 10, 1981
4242942 Hydraulic positioner with feedback device Jan. 6, 1981
4074702 Control valve for bleeding fluid actuator Feb. 21, 1978
4066099 Zero lap valve Jan. 3, 1978
3938555 Valve override apparatus Feb. 17, 1976











 
 
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