.~ By adjustably limiting vane or abutment movement
DEFINITION
Classification: 418/23
(under subclass 16) Apparatus in which the effective volume of the working chamber is varied by adjustably restricting the limit of outward movement of a vane or abutment, from the working or cylinder member, respectively, in which it is mounted whereby to control the extent of sweeping contact of its outer edge with the peripheral working chamber surface of the other member.
(1) Note. A vane or abutment adjustable merely for making a better seal is not considered proper subject matter for classification here and such devices have been classified in subclasses 105 and 106.
