US PATENT SUBCLASS 91 / 408
.~.~.~.~ Working member covers exhaust port (409)

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

392  DF  WORKING MEMBER POSITION RESPONSIVE MOTIVE FLUID CONTROL {9}
404  DF  .~ Exhaust control {2}
405  DF  .~.~ Throttling (e.g., cushioning) {2}
407  DF  .~.~.~ By successively controlling or controlling less than all of plural exhaust passages {1}
408.~.~.~.~ Working member covers exhaust port (409)

DEFINITION

Classification: 91/408

(under subclass 407) Apparatus in which the working member covers an exhaust port located in a wall of the working chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

409, for other motors in which the working member covers an exhaust port in the contracting chamber.