US PATENT SUBCLASS 91 / 466
.~.~ Unitary inlet and exhaust valve means for opposed working chambers

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

418  DF  WITH MOTIVE FLUID VALVE {32}
462  DF  .~ For double-acting motor {4}
466.~.~ Unitary inlet and exhaust valve means for opposed working chambers {1}
467  DF  .~.~.~> Valve means moves about an axis

DEFINITION

Classification: 91/466

(under subclass 462) Apparatus in which the inlet and exhaust for the opposed chambers is controlled by a single unitary

movable valve means having no relatively movable parts for the valving function.

(1) Note. Two spaced unitary inlet and exhaust valves in which the unitary movable elements are connected together by a rigid means to make them move as a unit are included under this definition.