US PATENT SUBCLASS 91 / 444
.~ Relatively movable serial valves

Current as of: June, 1999
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91 /   HD   MOTORS: EXPANSIBLE CHAMBER TYPE

418  DF  WITH MOTIVE FLUID VALVE {32}
444.~ Relatively movable serial valves {3}
445  DF  .~.~> Stop valve between working chamber and inlet and exhaust valve
446  DF  .~.~> Including motive fluid pressure or flow responsive valve (468) {1}
448  DF  .~.~> In supply path

DEFINITION

Classification: 91/444

(under subclass 418) Apparatus in which the valve means comprises at least two valves through which the fluid must pass serially in the course of flowing either to the working chamber or exhausting from the working chamber, each valve having a movable fluid flow controlling element so arranged that the control of the motive fluid by the valves is effected by the movement of the movable element of one valve relative to the movable element of another valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

12, and 15, for cyclically operable expansible chamber motors with serially arranged reversing valves arranged between the supply and exhaust and opposed expansible chambers of the motor.

30, for expansible chamber motors with serially arranged reversing valves arranged between the supply and exhaust and opposed expansible chambers of the motor.

246+, for cyclically operable expansible chamber motors having a throttle valve correlated with the distributor.

247+, for cyclically operable expansible chamber motors having additional valve means for adjusting the timing of the fluid control events.

264, for cyclically operable expansible chamber motors having serially arranged distributors which are relatively movable. 274, for cyclically operable expansible chamber motors having additional valve means to controllably vary the fluid handling capacity of the inlet or exhaust passage.

335+, for cyclically operable expansible chamber motors which include a throttle valve in the flow path to the

distributor.