US PATENT SUBCLASS 418 / 229
.~ Sliding

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

228  DF  AXIALLY MOVING VANE OR ABUTMENT {2}
229.~ Sliding {1}
230  DF  .~.~> Positively biased {1}

DEFINITION

Classification: 418/229

(under subclass 228) Apparatus wherein the vane or abutment has to-and-fro straight line movement along or parallel to the working member axis of rotation.