US PATENT SUBCLASS 418 / 68
ROTATING INTERNAL MEMBER ROTATES AND OSCILLATES OR RECIPROCATES

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

68ROTATING INTERNAL MEMBER ROTATES AND OSCILLATES OR RECIPROCATES

DEFINITION

Classification: 418/68

(under the class definition) Apparatus in which in addition to rotary movement a rotating internal member has periodic to-and-fro movement incident to the expansion and contraction of the working chamber.