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Class Information
Number: 137/491
Name: Fluid handling > Line condition change responsive valves > Pilot or servo controlled > Fluid pressure type > Choked or throttled pressure type > Choked passage through main valve head
Description: Apparatus in which the restricted and unvalved passage passes through the main or flow controlling valve.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8627846 Pressure regulator having an integral pilot and self-relieving mechanism Jan. 14, 2014
8375981 Pressure control valve Feb. 19, 2013
8365763 Pilot-controlled pressure limiting valve Feb. 5, 2013
8113233 Hydraulic circuit of option device for excavator Feb. 14, 2012
7946358 Sequence valve and a downhole tractor May. 24, 2011
7819130 Metering orifice arrangement for a hydraulic current divider and current adding device Oct. 26, 2010
7665579 Flow control valve having pressure compensating valve Feb. 23, 2010
7565915 Feed pressure valve Jul. 28, 2009
7467642 Soft ventable relief valve Dec. 23, 2008
7431099 Automotive onboard fire suppression system reservoir with discharge port controlled by piloted spool valve Oct. 7, 2008
7204266 Pilot-operated pressure shut-off valve Apr. 17, 2007
7201183 Valve arrangement in a hydraulic circuit, use of the same and arrangement for controlling a hydraulic vehicle drive Apr. 10, 2007
7159610 Relief valve Jan. 9, 2007
7134447 Gas pressure regulator Nov. 14, 2006
7077157 Spring-loaded pressure relief valve, particularly for containers of pressurized fluids Jul. 18, 2006
7069945 Cartridge relief valve with improved stability Jul. 4, 2006
6986362 Pilot operated relief valve Jan. 17, 2006
6957663 Solenoid control valve Oct. 25, 2005
6915787 Fuel supply apparatus and fuel pressure regulator Jul. 12, 2005
6820641 Internally piloted dome loaded regulator Nov. 23, 2004
6805155 Cartridge relief valve with improved stability Oct. 19, 2004
6802339 Assembly having a spring-loaded tandem control valve Oct. 12, 2004
6786231 Fluid flow regulator with restrictor pin Sep. 7, 2004
6772785 Demand valve for breathing apparatus Aug. 10, 2004
6745792 Hydraulic relief valve Jun. 8, 2004
6648010 Check valve plate with anti-pressure surge device Nov. 18, 2003
6644346 Spring-loaded tandem control valve Nov. 11, 2003
6640830 Pilot operated pressure valve Nov. 4, 2003
6318406 Pilot operated relief valve Nov. 20, 2001
6263909 Valve assembly Jul. 24, 2001
6263908 Slow opening gas valve Jul. 24, 2001
6161570 Pilot-operated relief valve Dec. 19, 2000
6119722 Pilot operated pressure valve Sep. 19, 2000
6105608 Gas purge valve Aug. 22, 2000
6039070 Pilot operated pressure valve Mar. 21, 2000
5992450 Cartridge valve having solenoid bypass and integral relief valve Nov. 30, 1999
5954138 Fire extinguisher valve and fire-extinguishing equipment Sep. 21, 1999
5771921 Pressure regulator Jun. 30, 1998
5730182 Pressure compensation valve Mar. 24, 1998
5546980 Floating cage cartridge valve and knob Aug. 20, 1996
5460198 Pressure-activated flow-control valve Oct. 24, 1995
5400817 High-capacity pressure limiting valve Mar. 28, 1995
5396924 Pressure limiting valve with replacement control valve Mar. 14, 1995
5301920 High-speed solenoid valve apparatus Apr. 12, 1994
5295663 Pressure control valve Mar. 22, 1994
5195556 Pressure relief valve Mar. 23, 1993
5174328 Pressure control valve Dec. 29, 1992
5136845 Hydrostatic transmission and relief valve therefor Aug. 11, 1992
5097746 Metering valve Mar. 24, 1992
5080129 Pilot operated pressure reducing valve Jan. 14, 1992

1 2 3










 
 
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