US PATENT SUBCLASS 418 / 208
MOVABLE INTERMEDIATE PARTITION ENGAGES PERIPHERIES OF PLURAL SPACED WORKING MEMBERS


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418 /   HD   ROTARY EXPANSIBLE CHAMBER DEVICES

208MOVABLE INTERMEDIATE PARTITION ENGAGES PERIPHERIES OF PLURAL SPACED WORKING MEMBERS


DEFINITION

Classification: 418/208

(under the class definition) Apparatus in which there is provided a movable partition element having end portions in touching relationship with the peripheries of a plurality of spaced parallel working members thereby form a boundary of the working chamber or chambers against which working fluid react.