US PATENT SUBCLASS 418 / 26
.~.~.~ With working fluid bias

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

16  DF  WITH CHANGEABLE WORKING CHAMBER MAGNITUDE {10}
24  DF  .~ Spring or fluid biased movable member {2}
25  DF  .~.~ Positively biased in opposite directions {1}
26.~.~.~ With working fluid bias

DEFINITION

Classification: 418/26

(under subclass 25) Apparatus in which the cylinder or the working member is urged to move in at least one of the directions by the working fluid.