US PATENT SUBCLASS 418 / 261
.~.~ In opposite directions

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

259  DF  POSITIVELY ACTUATED VANE {4}
260  DF  .~ Cam actuated {1}
261.~.~ In opposite directions {3}
262  DF  .~.~.~> With pivoted interposed lever
263  DF  .~.~.~> With spring or fluid bias
264  DF  .~.~.~> With roller

DEFINITION

Classification: 418/261

(under subclass 260) Apparatus in which the vane is positively moved in each direction.

(1) Note. The vane movement in the opposite direction may be performed by the cam or by other positive vane moving means.