US PATENT SUBCLASS 418 / 217
.~.~ Axially moving abutment or vane

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

209  DF  PLURAL WORKING CHAMBERS {2}
215  DF  .~ Axially spaced working chambers {2}
217.~.~ Axially moving abutment or vane {2}
218  DF  .~.~.~> Moving about non-parallel axis
219  DF  .~.~.~> Vane

DEFINITION

Classification: 418/217

(under subclass 215) Apparatus in which either an abutment or a vane is movable along or parallel to the axis of rotation of the working member.