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Class Information
Number: 137/115.16
Name: Fluid handling > Self-proportioning or correlating systems > Self-controlled branched flow systems > Bypass or relief controlled by main line fluid condition > Pressure responsive > Bypass or relief valve biased open
Description: Subject matter wherein the bypass or relief passage is held open in absence of the fluid pressure by a flexibly adjustable device (e.g., a weight of the valve body itself, or a spring, or such similar flexible means).










Sub-classes under this class:

Class Number Class Name Patents
137/115.17 Increasing pressure progressively closes then reopens by-pass or relief valve 14


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8464668 Vehicle cooling system with directed flows Jun. 18, 2013
8215330 Adjustable recirculating valve Jul. 10, 2012
8201401 Passive valve assembly with negative start angle Jun. 19, 2012
7681584 Pipe disconnector Mar. 23, 2010
7575016 Pipe disconnector with increased sealing power Aug. 18, 2009
7059340 Valve assembly for pipe disconnectors Jun. 13, 2006
7000387 Hydraulic spool valve for use in a hydraulic vehicle drive Feb. 21, 2006
6857444 Flow-actuated trapped-pressure unloader valve Feb. 22, 2005
6769880 Pressure blowdown system for oil injected rotary screw air compressor Aug. 3, 2004
6698446 Check valve Mar. 2, 2004
6575189 Automatic valve Jun. 10, 2003
6295811 Valve device for a hydraulic motor adapted to drive a high inertia mass Oct. 2, 2001
6178998 Reverse flow prevention apparatus Jan. 30, 2001
6173730 Charging and bleed value Jan. 16, 2001
6006748 Vent valve apparatus Dec. 28, 1999
5997693 Stock liquor pressure pulsation absorbing apparatus and method Dec. 7, 1999
5950658 Fluid flow deverter unit Sep. 14, 1999
5765291 Compressed-gas system with a gas drier Jun. 16, 1998
5718255 Flow-responsive diverting valve Feb. 17, 1998
5681151 Motor driven air compressor having a combined vent valve and check valve assembly Oct. 28, 1997
5546975 Control device for a fluid passing through a bypass and system equipped with such a device to regulate the supercharging air of an internal combustion engine Aug. 20, 1996
5513958 Accumulator charging valve May. 7, 1996
5487403 Variable discharge pump with low unload to secondary Jan. 30, 1996
5485864 Pressure compensation valve Jan. 23, 1996
5433237 Dedrooped bypass valve Jul. 18, 1995
5419365 Pressure regulator for water blasting May. 30, 1995
5372157 Automatic bypass valve Dec. 13, 1994
5289843 Hydraulic safety valve Mar. 1, 1994
5279319 Water pressure relief method and system for water heaters Jan. 18, 1994
4953582 Combined pressure regulator and relief valve having a single biasing means Sep. 4, 1990
4941502 Low pressure recirculation valve Jul. 17, 1990
4897996 Low-loss cyclically-operating pressure-responsive bypass valve for fixed displacement pump flow control Feb. 6, 1990
4635671 Flow and pressure control valve system Jan. 13, 1987
4629156 Pressure relief and shut-off valve Dec. 16, 1986
4623301 Overflow check system Nov. 18, 1986
4618123 Valve system for a hydraulically controlled starting friction clutch Oct. 21, 1986
4616672 Pressure relief and drain valve Oct. 14, 1986
4587988 Hydraulic pressure-relief valve May. 13, 1986
4567909 Oxygen partial pressure controller for a pressure swing adsorption system Feb. 4, 1986
4552168 Stabilizer for priority flow divider valve Nov. 12, 1985
4543976 Control valves for vehicle hydraulic systems Oct. 1, 1985
4503876 Control valve for vehicle hydraulic systems Mar. 12, 1985
4498494 Air control for a lumbar support device Feb. 12, 1985
4470464 Valve means Sep. 11, 1984
4470428 Unloader and check valve Sep. 11, 1984
4434110 Carburetor, control apparatus and method for internal combustion engines Feb. 28, 1984
4428393 Quick vent response valve Jan. 31, 1984
4418709 Unloading valve for hi-lo-hydraulic system Dec. 6, 1983
4388047 Solenoid-operated pump Jun. 14, 1983
4370102 Fluid pumping device Jan. 25, 1983

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