(under subclass 61) Apparatus in which the working members are of the type which move back and forth in an arcuate path within a working chamber to effect expansion or contraction of the expansible chamber, the travel of said working members in one direction of said arcuate path being limited to no more than 360 degrees.
SEE OR SEARCH THIS CLASS, SUBCLASS:
66, for a plurality of reciprocating working members which are positioned in movable cylinders which are mounted for oscillatory movement in an arcuate path of not more than 360
degrees.
SEE OR SEARCH CLASS
91, Motors: Expansible Chamber Type,
177, for relatively movable oscillating working members provided with fluid control means.
