Switching valve device

Details Switching valve device Switching valve device

1986-05-28

1988-06-07

Look, Edward K.

Expansible chamber devices

Displacement control of plural cylinders arranged in...

Parallel cylinders

60487, 91437, 188300, F01B 300

Patent

active

047488980

ABSTRACT:
A switching valve device provided in an oil passage in which the flow of oil pressure is supposed to occur in both directions, the switching valve device having two check valves provided in the oil passage so as to allow a flow of oil pressure in respective directions opposite to each other, the check valves being biased by means of springs in their respective closing direction, and means is provided for forcibly open the check valves against the bias of the springs. Thereby the switching valve device selectively assumes a first state which allows a flow of oil pressure in one direction, a second state which allows the flow in the other direction, and a third state which does not allow such flow in any direction.

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