US PATENT SUBCLASS 418 / 238
.~ Positively biased


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

236  DF  NON-RADIALLY POSITIONED SLIDING VANE OR ABUTMENT {2}
238.~ Positively biased


DEFINITION

Classification: 418/238

(under subclass 236) Apparatus in which the vane or abutment is urged to move at least in one direction in the operation of the device by means other than the surface of the cylinder or working member respectively, another vane or abutment or the weight of the vane or abutment and is moved incident to the expansion and contraction of the working chamber.