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Class Information
Number: 137/115.23
Name: Fluid handling > Self-proportioning or correlating systems > Self-controlled branched flow systems > Bypass or relief controlled by main line fluid condition > Pressure responsive > Pilot valve operated
Description: Subject matter comprising an auxiliary control valve and wherein the bypass or relief valve is controlled by the auxiliary control valve in response to the pressure in the main flow line.










Patents under this class:

Patent Number Title Of Patent Date Issued
8596993 Dual-pump supply system with bypass-controlled flow regulator Dec. 3, 2013
8439069 Air release valve May. 14, 2013
8408233 Flow control system and method for controlling two positive displacement pumps Apr. 2, 2013
7513269 Hydraulic control system for automatic transmission Apr. 7, 2009
7204266 Pilot-operated pressure shut-off valve Apr. 17, 2007
7178545 Modulating bypass control system and method Feb. 20, 2007
7017605 Valve assembly Mar. 28, 2006
6820641 Internally piloted dome loaded regulator Nov. 23, 2004
6601602 Pressure-control valve Aug. 5, 2003
6176251 Valve assembly in particular for a pressure washer Jan. 23, 2001
6170508 Fluid flow regulating valve and method Jan. 9, 2001
6095177 Precontrolled 3-way pressure control valve Aug. 1, 2000
6041808 Compressed air control device for a source of compressed air on motor vehicles Mar. 28, 2000
5957148 Valve system having a deadman controlled actuating member in a vented chamber Sep. 28, 1999
5857479 Precontrolled three-way pressure reduction valve Jan. 12, 1999
5758683 On/off circuit for a hydraulic system Jun. 2, 1998
5735305 Unloading system for hydraulic circuit Apr. 7, 1998
5375619 Protective circuit for pressure and return Dec. 27, 1994
5323799 Fully mechanical pressure relief system Jun. 28, 1994
5209255 Accumulator loading valve May. 11, 1993
5172624 Hydraulic device Dec. 22, 1992
4997459 Gas pressure relief system Mar. 5, 1991
4700748 Pressure-referenced programmed flow control in a hydraulic valve Oct. 20, 1987
4611621 Pressure control valve and oil supply device using said valve Sep. 16, 1986
4592378 Low pressure pool cleaner system Jun. 3, 1986
4591317 Dual pump controls May. 27, 1986
4559965 Multiple compensating unloading valve circuit Dec. 24, 1985
4344451 Pressure responsive distributing valve device Aug. 17, 1982
4240255 Integrated control device for a fluid circuit and applications thereof Dec. 23, 1980
4163412 Fluid cylinder control with precision stop action Aug. 7, 1979
4114637 Variable differential pressure unloading valve apparatus Sep. 19, 1978
4099378 Blocking valve for power steering for lift trucks Jul. 11, 1978
4095611 Modulating flow control valve assembly Jun. 20, 1978
4084604 Pressure responsive distributing valve Apr. 18, 1978
4062374 Hydraulic valves and hydraulic systems Dec. 13, 1977
4020862 Apparatus for controlling the volume and pressure of a pressure medium in a die-casting machine May. 3, 1977
4016898 Means for suppressing cavitation in a high pressure relief valve Apr. 12, 1977
4011887 Fluid power control apparatus Mar. 15, 1977
4007756 Air control apparatus for an engine exhaust gas purification system Feb. 15, 1977
3965920 Installations for monitoring oil content Jun. 29, 1976











 
 
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