US PATENT SUBCLASS 91 / 462
.~ For double-acting motor

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

418  DF  WITH MOTIVE FLUID VALVE {32}
462.~ For double-acting motor {4}
463  DF  .~.~> With means to provide unequal flow rates to or from opposed working chambers
464  DF  .~.~> Means to simultaneously open working chambers to inlet or exhaust
465  DF  .~.~> Relatively movable unitary inlet and exhaust valves for opposed working chambers
466  DF  .~.~> Unitary inlet and exhaust valve means for opposed working chambers {1}

DEFINITION

Classification: 91/462

(under subclass 418) Apparatus in which the motor has a working member positioned to move in opposite directions in opposed working chambers by alternate supply of motive fluid to one side of the piston and the alternate exhaust from the other.

SEE OR SEARCH THIS CLASS, SUBCLASS:

166, for double acting expansible chamber motors with valve means to reverse the direction of movement in response to variations in the motive fluid supply line pressure or flow.

420, for double acting expansible chamber motors with an exhaust valve for the contracting chamber which is controlled by the motive fluid pressure applied to the expanding chamber.

421, for double acting expansible chamber motors with valve means controlling the expanding chamber inlet in response to the contracting chamber motive fluid pressure or flow.

437+, for double acting expansible chamber motors with an independently controlled by-pass between opposed working chambers.

455, for double acting expansible chamber motors having relatively movable inlet and exhaust valves for one chamber in which one of the valves also forms a unitary valve part for the opposed chamber.