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Class Information
Number: 137/596.1
Name: Fluid handling > Systems > Supply and exhaust > Biased exhaust valve
Description: Devices in which the exhaust valve is biased toward one of its positions.










Sub-classes under this class:

Class Number Class Name Patents
137/596.2 Biased closed 196


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8528599 Pulse width modulated solenoid Sep. 10, 2013
7891375 Softstart valve means Feb. 22, 2011
7735516 Lift axle control module Jun. 15, 2010
7717128 Pressure balanced three-way valve for motion control May. 18, 2010
7484527 Switch valve device Feb. 3, 2009
7370669 Electromagnetic valve May. 13, 2008
7367355 Twin manifold seat valve having solenoid actuation May. 6, 2008
7229063 Pressure control valve Jun. 12, 2007
6959728 Rotary cam valve Nov. 1, 2005
6907902 Hydraulic signal output device Jun. 21, 2005
6789574 Pneumatic control assembly with simplified direction control valve Sep. 14, 2004
6431209 Multi-pressure ball-poppet control valve Aug. 13, 2002
6412884 Solenoid-controlled valve Jul. 2, 2002
6192929 Hydraulic controller Feb. 27, 2001
6125886 Pilot valve Oct. 3, 2000
5983942 Damper of hydraulic pilot valve Nov. 16, 1999
5918631 Ball-poppet pneumatic control valve Jul. 6, 1999
5878647 Pilot solenoid control valve and hydraulic control system using same Mar. 9, 1999
5845680 Damper of hydraulic pilot valve Dec. 8, 1998
5823227 Hydraulic pilot valve Oct. 20, 1998
5819800 Hydraulic pilot valve Oct. 13, 1998
5683071 Apparatus for controlling selectively engageable detents in a pilot controller Nov. 4, 1997
5660247 Rack servo-steering, particularly for motor vehicles Aug. 26, 1997
5615704 Push Button Pendant for a hoist or winch Apr. 1, 1997
5566716 Hydraulic control valve Oct. 22, 1996
5558127 Hydraulic pilot valve Sep. 24, 1996
5544538 Hydraulic controller for automatic transmission having automatic manual control and automatic failsafe operation Aug. 13, 1996
5482085 Pilot pressure sub-assembly for fluid control valve Jan. 9, 1996
5454400 Zero leakage directional control valve Oct. 3, 1995
5433249 Hydraulic pilot valve Jul. 18, 1995
5251660 Hydraulic pilot valve unit Oct. 12, 1993
5209263 Pilot valve assembly May. 11, 1993
5174333 Output pressure control apparatus Dec. 29, 1992
5152142 Negative load control and energy utilizing system Oct. 6, 1992
5092362 On-off valves and pressure regulators for high-pressure fluids Mar. 3, 1992
5044256 Exhaust pressurizing control for a fluid system Sep. 3, 1991
4836234 Electrically operated fluid control valve Jun. 6, 1989
4799420 Load responsive control system adapted to use of negative load pressure in operation of system controls Jan. 24, 1989
4796667 Brake pressure control valve Jan. 10, 1989
4793238 Control signal blocking direction control valve in load-sensing circuit Dec. 27, 1988
4741248 Load responsive system having synchronizing systems between positive and negative load compensation May. 3, 1988
4694731 Load compensated valve Sep. 22, 1987
4688470 Compensated fluid flow control valve Aug. 25, 1987
4679492 Compensated fluid flow control valve Jul. 14, 1987
4665801 Compensated fluid flow control valve May. 19, 1987
4640308 Fluid control valve Feb. 3, 1987
4596274 Slide control valve Jun. 24, 1986
4566492 Fluid distributing device, more especially for remote control Jan. 28, 1986
4538641 Clutch-clutch-brake steering mechanism for tractors Sep. 3, 1985
4505299 3-Port, 2-position directional control valve Mar. 19, 1985

1 2 3










 
 
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