US PATENT SUBCLASS 418 / 209
PLURAL WORKING CHAMBERS

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

209PLURAL WORKING CHAMBERS {2}
210  DF  .~> Axially spaced rotating members rotate on common axis {2}
215  DF  .~> Axially spaced working chambers {2}

DEFINITION

Classification: 418/209

(under the class definition) Apparatus comprising two or more working chambers, each chamber being adapted to receive either a separate rotating working member or a separate working face or wall of a rotating member common to each working chamber.