US PATENT SUBCLASS 418 / 227
.~ Positively rotated

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

225  DF  VANE OR ABUTMENT COMPRISES ROTATABLE ELEMENT {2}
227.~ Positively rotated

DEFINITION

Classification: 418/227

(under subclass 225) Apparatus wherein the abutment or vane is mounted for rotation on the cylinder or working member respectively and is urged to have relative rotation with the element (cylinder or working member) to which it is mounted by means other than the surface of the other element.