US PATENT SUBCLASS 418 / 265
.~ In opposite directions

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

259  DF  POSITIVELY ACTUATED VANE {4}
265.~ In opposite directions

DEFINITION

Classification: 418/265

(under subclass 259) Apparatus in which the vane is moved in both directions.