Pressurized oil supply/discharge circuit and valve device for us

Details Pressurized oil supply/discharge circuit and valve device for us Pressurized oil supply/discharge circuit and valve device for us

1991-07-03

1992-06-30

Michalsky, Gerald A.

Motors: expansible chamber type

With motive fluid valve

Relatively movable serial valves

91451, 1374933, 1374936, 1374939, 1375992, F15B 1302

Patent

active

051253232

ABSTRACT:
A check valve (14) with a valve opening actuator and a bypass passage (16) are disposed in parallel in a pressurized oil supply/discharge passage (3) connected in communication with a hydraulic actuation chamber (2). A residual pressure holding valve (17) and a flow restrictor (21) are disposed in series in the bypass passage (16). The supply/discharge passage (3) and a discharge passage (7) are connected in communication by a pressure compensation valve (12). While the valve (17) is adapted to be moved to a valve closing position by means of pressure supplied at a check valve inlet (14a) and a residual pressure holding spring (19), it is adapted to be moved to its valve opening position by means of pressure supplied at a check valve outlet (14b). The valve (17) includes a valve member (38) resiliently urged to a valve seat (40) by means of a spring (19).

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