US PATENT SUBCLASS 418 / 237
.~ Arc shaped

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

236  DF  NON-RADIALLY POSITIONED SLIDING VANE OR ABUTMENT {2}
237.~ Arc shaped

DEFINITION

Classification: 418/237

(under subclass 236) Apparatus wherein the sliding vane or abutment moves in an arcuate path.