Fluid handling – Systems – Multi-way valve unit
Patent
1981-06-08
1983-11-15
Cohan, Alan
Fluid handling
Systems
Multi-way valve unit
91375R, F15B 908
Patent
active
044150024
ABSTRACT:
A hydraulic control apparatus includes a rotatable sleeve member (50) defining a bore receiving rotatable input (32) and output (36) members. The members define aligned grooves (64, 66, 68) cooperating to define an aperture (70) movably receiving an elongated pin (72) coupling the members for rotation in unison. The pin (72) cooperates with the members to substantially define a pair of fluid flow paths. Relative rotation of the members supplies pressurized fluid from a pressure source (16) to the chambers of an actuator (44) via the pair of fluid flow paths. The pin and sleeve member cooperate to define a pressure chamber (112) receiving pressurized fluid from the pair of fluid flow paths via a passage (114). Pressurized fluid in the chamber (112) biases the pin into engagement with the input member preventing leakage of pressurized fluid from one flow path to the other at the interface of the pin and input member. The input member defines recesses cooperating with recesses on the sleeve member to define a part of the fluid flow paths. The recesses on the input member define parallel surfaces simplifying the formation of the recesses.
REFERENCES:
patent: 4057079 (1977-11-01), Taig
patent: 4117864 (1978-10-01), Taig
Cohan Alan
Decker Ken C.
Schoenle Paul David
The Bendix Corporation
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