US PATENT SUBCLASS 418 / 211
.~.~ With axially moving vane or abutment

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

209  DF  PLURAL WORKING CHAMBERS {2}
210  DF  .~ Axially spaced rotating members rotate on common axis {2}
211.~.~ With axially moving vane or abutment

DEFINITION

Classification: 418/211

(under subclass 210) Apparatus provided with either a vane or an abutment movable in a direction along or parallel to the axis of rotation of the rotating members and movable incident to the expansion and contraction of the respective working chambers or working chamber portions.