US PATENT SUBCLASS 91 / 468
.~ Self-acting valve (432) (446) (451) (452)


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

418  DF  WITH MOTIVE FLUID VALVE {32}
468.~ Self-acting valve (432) (446) (451) (452)


DEFINITION

Classification: 91/468

(under subclass 418) Apparatus in which the valve means comprises a valve in a line which operates in response to motive fluid pressure, rate of flow, or direction of flow in the line.

SEE OR SEARCH THIS CLASS, SUBCLASS:

155, for expansible chamber motors of the multiple expansion type with fluid actuated valve means.

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

281+, for cyclically operable expansible chamber motors having motive fluid pressure or flow responsive valve means.

420, for expansible chamber motors in which a contacting chamber exhaust valve is controlled by expanding chamber pressure or flow.

421, for expansible chamber motors in which an expanding chamber inlet valve is controlled by contacting chamber pressure or flow. 432, for expansible chamber motors having a check valve in the inlet the check valve having means providing a

disconnectable motive fluid supply line.

433+, for expansible chamber motors with valve means controlling both the inlet and exhaust to a single chamber in response to the motive fluid pressure in the supply line or chamber.

438+, for expansible chamber motors having a by-pass between opposed working chambers held closed by motive fluid pressure.

441, for expansible chamber motors having valve means which opens to ambient when the pressure in the expanding chamber falls below the pressure of the ambient fluid source.

442, for expansive chamber motors with a self opening exhaust valve held closed by inlet pressure.

446+, for expansible chamber motors with relatively movable serial valves one of which is a motive fluid pressure or flow responsive valve. NOTE "PLACEMENT OF PATENTS" IN THE CLASS DEFINITION AND THE PARAGRAPH FOLLOWING THE TITLE IN THE SCHEDULE OF THIS CLASS.

452, for expansible chamber motors with plural separately controlled waste passages for a single chamber in which one of the passages is controlled by a motive fluid pressure or flow responsive valve and subclass 451 for similar motors in which another of the passages is controlled by an inlet and exhaust valve.