US PATENT SUBCLASS 91 / 447
.~.~.~ Between working chamber and inlet and exhaust valve

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  DF  .~.~ Including motive fluid pressure or flow responsive valve (468) {1}
447.~.~.~ Between working chamber and inlet and exhaust valve

DEFINITION

Classification: 91/447

(under subclass 446) Apparatus in which another of the serial valves is an inlet and exhaust valve and the pressure or flow responsive valve is disposed in the motor line between the inlet and exhaust valve and the working chamber.