US PATENT SUBCLASS 418 / 21
.~.~ Movable member moved axially

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

16  DF  WITH CHANGEABLE WORKING CHAMBER MAGNITUDE {10}
19  DF  .~ Intermeshing rotary members {2}
21.~.~ Movable member moved axially

DEFINITION

Classification: 418/21

(under subclass 19) Apparatus in which a dimension of the working chamber is changed by moving the cylinder or a part thereof or the working member in a direction along the axis of rotation of the working member.