Power actuator for a rotary valve

Details Power actuator for a rotary valve Power actuator for a rotary valve

1998-06-26

2000-02-08

Lee, Kevin

Valves and valve actuation

Fluid actuated or retarded

Rotary or oscillatory motor

251251, F16K 3112

Patent

active

06021998&

ABSTRACT:
A rotary power actuator has an oscillating input member and an intermittent rotary output member. A controllable one-way mechanism, which is drivingly connected between the oscillating input member and the rotary output member, accommodates the intermittent motion of the output member. The input member and the one-way mechanism are controlled by hydraulic fluid during power actuation. The input member is returned to a neutral central position by a mechanism system consisting of a spring and ball arrangement while the one-way is maintained in the overrun condition. The output member is connected with a rotary valve member which is stepped to selected valve positions when the actuator is powered and retains the selected valve position when the input member is returned to the neutral central position.

REFERENCES:
patent: 2443333 (1948-06-01), Tucker
patent: 2811834 (1957-11-01), Shafer et al.
patent: 5137252 (1992-08-01), White
patent: 5690144 (1997-11-01), Takahashi
patent: 5879258 (1999-03-01), Stevenson et al.

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