US PATENT SUBCLASS 91 / 440
.~ For exhausting contracting working chamber to expanding opposed nonworking

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

418  DF  WITH MOTIVE FLUID VALVE {32}
440.~ For exhausting contracting working chamber to expanding opposed nonworking

DEFINITION

Classification: 91/440

(under subclass 418) Apparatus in which the motor includes a nonworking chamber and the valve means acts to exhaust motive fluid from the contracting working chamber to the nonworking

chamber which is expanded due to the movement of the working member contracting the working chamber.