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Class Information
Number: 251/38
Name: Valves and valve actuation > Fluid actuated or retarded > Pilot or servo type motor > Choked pressure type servo motor > Pilot valve seated in motor or valve element
Description: Subject matter in which the pilot valve co-acts with a seating surface therefor mounted on either the servo-motor element or the main valve so as to partake of the motion thereof.










Sub-classes under this class:

Class Number Class Name Patents
251/39 Controls inlet to choke chamber 18
251/40 Tilting pilot valve 106


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8596606 Automate fluid flow control system Dec. 3, 2013
8464998 Automate fluid flow control system Jun. 18, 2013
8196892 Fluid control valve Jun. 12, 2012
8191855 Bypass valve for internal combustion engines Jun. 5, 2012
8042787 Dual flush activation Oct. 25, 2011
7823633 Valve apparatus Nov. 2, 2010
7607635 Flush valve handle assembly providing dual mode operation Oct. 27, 2009
7556237 Flush valve Jul. 7, 2009
7516938 Flush valve diaphragm orifice insert and rib design Apr. 14, 2009
7487950 Flush valve Feb. 10, 2009
7478793 Filler spout with opening servo-controlled by a pilot valve Jan. 20, 2009
7341236 Pilot operated valve with a pressure balanced poppet Mar. 11, 2008
7296593 Opening and closing valve Nov. 20, 2007
7261275 Relief valve for use in a diaphragm flush valve Aug. 28, 2007
7198249 Electromagnetic shuttle valve Apr. 3, 2007
6971625 Pilot operated valve with variable piston orifice Dec. 6, 2005
6959904 Solenoid valve device of the bistable type, particularly for controlling the supply of water to a washing machine Nov. 1, 2005
6796515 One touch actuated valve Sep. 28, 2004
6691937 One touch actuated valve Feb. 17, 2004
6588724 On-off valves for high pressure fluids Jul. 8, 2003
6443420 Wide-ranging valve Sep. 3, 2002
6398182 Pilot solenoid control valve with an emergency operator Jun. 4, 2002
6318406 Pilot operated relief valve Nov. 20, 2001
6299127 Solenoid valve piston Oct. 9, 2001
6267349 Precision valve control Jul. 31, 2001
6220565 Safety valve assembly Apr. 24, 2001
6149124 Pilot solenoid control valve with pressure responsive diaphragm Nov. 21, 2000
6098647 Load-holding brake valve Aug. 8, 2000
6076550 Solenoid and solenoid valve Jun. 20, 2000
6036167 Solenoid-actuated control valve with mechanically coupled armature and spool valve Mar. 14, 2000
6017015 Magnetically operated drain valve of an electrohydraulic lifting module Jan. 25, 2000
5954311 Low power pilot valve actuated by transverse or perpendicular action Sep. 21, 1999
5904334 Quiet high flow control valve May. 18, 1999
5887848 Flush valve bypass and filter Mar. 30, 1999
5842679 Adjustable stroke solenoid operated cartridge valve Dec. 1, 1998
5797582 Distribution device for feeding a capacitor with gaseous fluid Aug. 25, 1998
5762087 Instant-on valve construction for high pressure gas Jun. 9, 1998
5738138 Reduced water hammer control valve Apr. 14, 1998
5732929 Anti-hammer pilot operated valve with tortuous flow path between inlet and pilot chamber Mar. 31, 1998
5716038 Proportional flow control valve Feb. 10, 1998
5676342 Proportional flow valve with diaphragm pressure member Oct. 14, 1997
5599003 Bistable solenoid valve Feb. 4, 1997
5564674 Valve actuated by its own medium Oct. 15, 1996
5564673 Pilot-operated hydraulic valve Oct. 15, 1996
5495865 Temperature relief valve with thermal trigger Mar. 5, 1996
5385328 Control valve Jan. 31, 1995
5363873 Anti-clog water valve Nov. 15, 1994
5339857 Media assisted valves Aug. 23, 1994
5335694 Flush valve flow control refill ring Aug. 9, 1994
5328148 Control device for hydraulic piston/cylinder unit Jul. 12, 1994

1 2 3










 
 
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