US PATENT SUBCLASS 418 / 239
ALTERNATELY USABLE VANE OR ABUTMENT STRUCTURE FOR REVERSE WORKING MEMBER ROTATION


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

239ALTERNATELY USABLE VANE OR ABUTMENT STRUCTURE FOR REVERSE WORKING MEMBER ROTATION


DEFINITION

Classification: 418/239

(under the class definition) Apparatus in which there is provided a plurality of partitioning members or partitioning member portions in which either (1) at least one of the partitioning members remains in a nonworking position while at least one other partitioning member performs work when the working member is rotating in one direction and vice versa or (2) a partitioning member having portions alternately movable to either one of two positions to perform work whereby the direction of working member rotation may be reversed.