US PATENT SUBCLASS 91 / 243
.~.~ Working member controlled exhaust port with valved 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}
243.~.~ Working member controlled exhaust port with valved second exhaust passage

DEFINITION

Classification: 91/243

(under subclass 236) Apparatus in which exhaust of motive fluid through an exhaust flow path is controlled by the motor working member uncovering an exhaust port, and exhaust of motive fluid through a second exhaust flow path is controlled by a valve operating in synchronism with motor operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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