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Class Information
Number: 91/373
Name: Motors: expansible chamber type > Working member position feedback to motive fluid control > Follower type > With motor chamber pressure reaction on valve > Spring-loaded valve > With lost motion between input and reaction member
Description: Apparatus in which movable parts of the input signal means and the means responsive to fluid pressure are operatively connected to transmit forces to each other during a portion of their operation and to move relative to each other without transmitting force during another portion of their operation.

Patents under this class:

Patent Number Title Of Patent Date Issued
6520044 Brake pedal shock absorber and method Feb. 18, 2003
6467267 Fluid pressure boosting device and brake system employing the same Oct. 22, 2002
5289757 Reaction assembly for liquid pressure booster Mar. 1, 1994
5090293 Hydraulic booster with reaction force imparting surface of easily modifiable form Feb. 25, 1992
5031404 Pressurized air booster Jul. 16, 1991
4976105 Hydraulic booster system with accumulator Dec. 11, 1990
4920857 Hydraulic pressure booster May. 1, 1990
4905570 Hydraulic power booster for a vehicle brake system Mar. 6, 1990
4905571 Air booster with pressure-balanced valve Mar. 6, 1990
4759259 Servo-control for power steering arrangement Jul. 26, 1988
4638719 Unbalanced hydraulic amplifier valve assembly Jan. 27, 1987
4379423 Hydraulic amplifier Apr. 12, 1983
4325286 Steering valve mechanism having closed neutral position Apr. 20, 1982
4319455 Hydraulic power brake system and hydraulic brake booster and controls therefor Mar. 16, 1982
4317332 Hydraulic power brake system and hydraulic brake booster and controls therefor Mar. 2, 1982
4309934 Hydraulic brake booster Jan. 12, 1982
4064789 Control valve for pressure-medium servo-motor Dec. 27, 1977
4034566 Hydraulic boosting apparatus in braking system Jul. 12, 1977
4033131 Two stage servomotor Jul. 5, 1977
4010815 Servo steering gear, particularly for alleviator-controlled constant pressure servo systems in motor vehicles Mar. 8, 1977
3979912 Brake booster utilizing a pump of a power steering device Sep. 14, 1976

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