US PATENT SUBCLASS 91 / 242
.~.~.~ Exhaust pressure controlled

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  DF  .~.~ Fluid pressure actuated valve for second exhaust passage {2}
242.~.~.~ Exhaust pressure controlled

DEFINITION

Classification: 91/242

(under subclass 240) Apparatus in which the valve is moved by pressure within or from the contracting chamber.

(1) Note. The exhaust pressure may act on the valve or its actuator to operate the valve, or may act on means which varies, limits or prevents operation of the valve by other valve operating means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

241, for a cyclically operable motor having a second exhaust passage controlled by a valve which is operated by compression actuated discharge to motive fluid supply.