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Class Information
Number: 137/596.13
Name: Fluid handling > Systems > Supply and exhaust > With bypass > Controlled by supply or exhaust valve
Description: Device wherein the supply and exhaust valve controls the fluid flow to or through the by-pass valve.










Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8393348 Directional control valve device and directional control valve device block having directional control valve devices Mar. 12, 2013
7958768 System to control pressure in a test device Jun. 14, 2011
7263924 Hydraulic circuit and its valve gear Sep. 4, 2007
6994116 Distributing valve for the load-independent control of a hydraulic consumer in terms of direction and speed Feb. 7, 2006
6971407 Hydraulic valve arrangement Dec. 6, 2005
6964281 Multiple hydraulic spool valve assembly with a monolithic body Nov. 15, 2005
6915729 Variable flow control apparatus for actuator of heavy construction equipment Jul. 12, 2005
6532989 Hydraulic distributor Mar. 18, 2003
6505645 Multiple hydraulic valve assembly with a monolithic block Jan. 14, 2003
6314997 Multiple valve apparatus Nov. 13, 2001
6267141 Hydraulic directional control valve Jul. 31, 2001
6192929 Hydraulic controller Feb. 27, 2001
6176261 Hydraulic control device Jan. 23, 2001
6164068 Variable pressure hydraulic systems Dec. 26, 2000
6161586 Tournament oil path constituting apparatus Dec. 19, 2000
6158462 Hydraulic pressure control device Dec. 12, 2000
6135149 Pressure compensating valves Oct. 24, 2000
6105613 Distributor for a hydraulic hoist which is controllable with regard to position and applied force, for tractors and agricultural machines Aug. 22, 2000
6098403 Hydraulic control valve system with pressure compensator Aug. 8, 2000
6089248 Load sense pressure controller Jul. 18, 2000
5996623 Hydraulic directional-control valve Dec. 7, 1999
5957159 Directional control valve with flow distribution valves Sep. 28, 1999
5890362 Hydraulic control valve system with non-shuttle pressure compensator Apr. 6, 1999
5845678 Pressurized fluid supply system Dec. 8, 1998
5778930 Add-in device for a hydraulic control arrangement Jul. 14, 1998
5778929 Directional control valve assembly having a pressure compensation valve Jul. 14, 1998
5765594 Hydraulic control valve Jun. 16, 1998
5752546 Fluid control valves May. 19, 1998
5735305 Unloading system for hydraulic circuit Apr. 7, 1998
5592967 Control valve with variable priority function Jan. 14, 1997
5586577 Mono-block control valve with side bypass passage Dec. 24, 1996
5515879 Load sensed multi-purpose pressure control valve May. 14, 1996
5501136 Control system for a hydraulic motor Mar. 26, 1996
5487403 Variable discharge pump with low unload to secondary Jan. 30, 1996
5471839 Valve apparatus and hydraulic drive system Dec. 5, 1995
5454223 Hydraulic load sensing system with poppet valve having an orifice therein Oct. 3, 1995
5440967 Method for controlling a hydraulic motor and a hydraulic valve therefor Aug. 15, 1995
5409038 Hydraulic circuit including pressure compensating valve Apr. 25, 1995
5394903 Hydraulic control valve Mar. 7, 1995
5376029 Control valve Dec. 27, 1994
5368061 Load sensed variable discharge fixed displacement pump control with low unload features Nov. 29, 1994
RE34746 Open-center steering control unit with flow amplification Oct. 4, 1994
5337778 Pressure control valve Aug. 16, 1994
5305789 Hydraulic directional control valve combining pressure compensation and maximum pressure selection for controlling a feed pump, and multiple hydraulic control apparatus including a plurality o Apr. 26, 1994
5279121 Flow control valve with pilot operation and pressure compensation Jan. 18, 1994
5273069 Operation valve with pressure compensation valve Dec. 28, 1993
5244358 Load sensed variable output gear pump Sep. 14, 1993
5218897 Hydraulic circuit apparatus for operating work-implement actuating cylinders Jun. 15, 1993
5218992 Check valve retainer Jun. 15, 1993
5203678 Valve apparatus and hydraulic drive system Apr. 20, 1993

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