US PATENT SUBCLASS 91 / 240
.~.~ Fluid pressure actuated valve for second exhaust passage

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

218  DF  CYCLICALLY OPERABLE {34}
236  DF  .~ Multiple exhaust passages (e.g., compression control) {5}
240.~.~ Fluid pressure actuated valve for second exhaust passage {2}
241  DF  .~.~.~> Compression actuated discharge to motive fluid supply
242  DF  .~.~.~> Exhaust pressure controlled

DEFINITION

Classification: 91/240

(under subclass 236) Apparatus in which the second exhaust passage is provided with a valve which is moved to open or

close said passage by fluid pressure acting on the valve or on its actuator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

239, for cyclically operable expansible chamber motors having multiple exhaust passages, in which the second exhaust passage is controlled by a fluid pressure actuated valve member, or a part rigidly attached thereto, which controls inlet of fluid or controls exhaust of fluid through a first exhaust passage.