US PATENT SUBCLASS 418 / 232
.~.~.~.~ Spring or fluid bias

Current as of: June, 1999
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418 /   HD   ROTARY EXPANSIBLE CHAMBER DEVICES

228  DF  AXIALLY MOVING VANE OR ABUTMENT {2}
229  DF  .~ Sliding {1}
230  DF  .~.~ Positively biased {1}
231  DF  .~.~.~ In opposite directions {1}
232.~.~.~.~ Spring or fluid bias

DEFINITION

Classification: 418/232

(under subclass 231) Apparatus in which the axially sliding vane or abutment is urged to move in one of the directions by either a resilient mechanical means or a nonsolid pressurized substance.