Three-way control valve

Details Three-way control valve Three-way control valve

1975-08-15

1976-07-06

Cohan, Alan

Fluid handling

Systems

Supply and exhaust

1375962, F15B 1304, F15B 1314

Patent

active

039676463

ABSTRACT:
A three-way control valve for a single-acting cylinder or other type of motor in which a valve body has an inlet port, a tank port and a control port, with a pair of poppet-type check valves operable to block flow from the control port to either the inlet port or the tank port. A poppet valve member is operable to control flow between the inlet port and the tank port. Means are provided for operating the poppet valve member and the check valves to cause either advance, return or hold operations of the cylinder and with decompression means for bleeding-off the cylinder pressure prior to opening of one of the check valves to connect the control port to the tank port to reduce the amount of force required to open the latter check valve.

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