US PATENT SUBCLASS 418 / 221
MOVING ABUTMENT AND VANE

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

221MOVING ABUTMENT AND VANE

DEFINITION

Classification: 418/221

(under the class definition) Apparatus in which there is provided a displaceable abutment and a displaceable vane, each of which moves incident to the expansion and contraction of the working chamber.