Valve with non-binding spool

Details Valve with non-binding spool Valve with non-binding spool

1979-04-30

1981-06-02

Cohan, Alan

Valves and valve actuation

Rotary valves

Plug

251314, 13762522, 13762547, F16K 1107

Patent

active

042707315

ABSTRACT:
A hydraulic assembly including a valve having a body (40), an elongated chamber (42) having a wall and a conduit (60) in the body, a valve spool (44) movable within the chamber, a drive (48) for the spool, an elongated sleeve (50) within the chamber and spaced from the wall thereof, the sleeve movably receiving the spool in a substantially fluid tight relation and having at least one port (52) for fluid flow with the flow through the port being controlled by the position of the spool within the sleeve, resilient washers (56) spacing the sleeve from the chamber wall and yieldably supporting the sleeve within the chamber, and yieldable fluid connections (64) extending between the port in the sleeve and the conduit in the body so that deflection in the body need not cause deflection of the sleeve so that binding tendencies between the spool and the sleeve are avoided.

REFERENCES:
patent: 2540467 (1951-02-01), Williams
patent: 3090396 (1963-05-01), Rudelick
patent: 4021016 (1977-05-01), Hart
patent: 4074614 (1978-02-01), Beals

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