US PATENT SUBCLASS 91 / 451
.~.~.~ Another passage controlled by motive fluid pressure or flow responsive valve (468)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


91 /   HD   MOTORS: EXPANSIBLE CHAMBER TYPE

418  DF  WITH MOTIVE FLUID VALVE {32}
449  DF  .~ Plural separately controlled waste passages for single working chamber {2}
450  DF  .~.~ One passage controlled by inlet and exhaust valve {1}
451.~.~.~ Another passage controlled by motive fluid pressure or flow responsive valve (468)

DEFINITION

Classification: 91/451

(under subclass 450) Apparatus in which the valve means controlling a second passage is a self acting valve operated in response to the motive fluid pressure or rate of flow in the chamber or motive fluid lines.

SEE OR SEARCH THIS CLASS, SUBCLASS:

240+, and 242, for cyclically operable expansible chamber motors having multiple exhaust passages with one passage controlled by a fluid pressure actuated valve.

452, for other motors having plural separately controlled waste passages for a single chamber, at least one of which is

controlled by a motive fluid pressure or flow responsive valve.

468, and see the subclasses there noted for other motors with self acting valves.