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Class Information
Number: 137/489.5
Name: Fluid handling > Line condition change responsive valves > Pilot or servo controlled > Fluid pressure type > Choked or throttled pressure type > Pilot controls supply to pressure chamber
Description: Devices in which the valved passage is so positioned that the pilot valve controls the ingress of the pressure fluid to the pressure chamber.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8631819 Gas supply system for pneumatic store ejection utilizing a removable, replaceable and on-board rechargeable gas storage vessel Jan. 21, 2014
8616234 Fluid control valve system and methods Dec. 31, 2013
8534182 Valvetrain oil control system and oil control valve Sep. 17, 2013
8439069 Air release valve May. 14, 2013
8381761 Pressure management control valve assembly Feb. 26, 2013
8327750 Valvetrain oil control system and oil control valve Dec. 11, 2012
8240327 Pressure loaded service regulator with pressure balanced trim Aug. 14, 2012
8210201 Regulator valve with locking system Jul. 3, 2012
8162002 Device for controlling the delivery of a combustible gas to a burner apparatus Apr. 24, 2012
8113233 Hydraulic circuit of option device for excavator Feb. 14, 2012
8011382 Bi-modal bleed valve assembly for gas turbine engine Sep. 6, 2011
7770612 Pressure-actuated air gun Aug. 10, 2010
7735513 Diaphragm valve with electronic pressure detection Jun. 15, 2010
7134447 Gas pressure regulator Nov. 14, 2006
7121297 Valve arrangement in a hydraulic circuit, use of the same and arrangement for controlling a hydraulic vehicle drive Oct. 17, 2006
6997165 Pressure control valve for a fuel system Feb. 14, 2006
6935363 Pressure control system for low pressure operation Aug. 30, 2005
6932101 Solenoid valve assembly for controlling gas supply Aug. 23, 2005
6895994 Self-operated protection device for pipeline May. 24, 2005
6820641 Internally piloted dome loaded regulator Nov. 23, 2004
6786231 Fluid flow regulator with restrictor pin Sep. 7, 2004
6595237 Pressure regulator for gas transport and distribution plants Jul. 22, 2003
6540204 High pressure solenoid pilot valve Apr. 1, 2003
6209577 Modulating action non-flowing pilot operated relief valve Apr. 3, 2001
6192924 Pilot operated relief valve Feb. 27, 2001
6035878 Diagnostic device and method for pressure regulator Mar. 14, 2000
6000637 High pressure water gun Dec. 14, 1999
5988988 Capacity control valve device for variable capacity swash plate compressors Nov. 23, 1999
5967176 Automatic flow control valve with variable set-points Oct. 19, 1999
5957148 Valve system having a deadman controlled actuating member in a vented chamber Sep. 28, 1999
5904333 Fuel control device and methods of making the same May. 18, 1999
5816286 Pressure unloading pilot operated regulator having pressure limiting check valve Oct. 6, 1998
5806553 Fluid pressure control and relief apparatus Sep. 15, 1998
5787925 Pneumatically servoed gas pressure regulator Aug. 4, 1998
5743293 Fuel control device and methods of making the same Apr. 28, 1998
5738333 Relief valve Apr. 14, 1998
5735308 Automatic constant-pressure regulating lift device Apr. 7, 1998
5709368 Hydraulic control valve for fluid metering and cylinder protection Jan. 20, 1998
5694975 Pressure regulator Dec. 9, 1997
5676172 Relief valve Oct. 14, 1997
5657784 Control arrangement for actuating a shut-off valve and method of operation Aug. 19, 1997
5620017 Pressure regulating system for a fire extinguishing facility Apr. 15, 1997
5615832 Air regulator control system for powder coating operation Apr. 1, 1997
5490539 Pressure regulator for maintaining a stable flow level of a fluid Feb. 13, 1996
5487273 Turbocharger having pneumatic actuator with pilot valve Jan. 30, 1996
5460196 Fluid supply pressure control method and apparatus Oct. 24, 1995
5421545 Poppet valve with force feedback control Jun. 6, 1995
5398719 Pressure protection installation for a pressure vessel Mar. 21, 1995
5348036 Automatic control valve Sep. 20, 1994
5327720 Differential pressure regulator valve Jul. 12, 1994

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