US PATENT SUBCLASS 91 / 446
.~.~ Including motive fluid pressure or flow responsive valve (468)

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

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

DEFINITION

Classification: 91/446

(under subclass 444) Apparatus in which one of the serial valves acts in response to pressure or flow in the line in which said one valve is placed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

468, and see the subclasses there noted for other motors with self acting valves.