US PATENT SUBCLASS 418 / 27
.~.~ Spring

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}
27.~.~ Spring

DEFINITION

Classification: 418/27

(under subclass 24) Apparatus wherein either the cylinder or the working member is positively urged in one direction by a resilient mechanical means to vary the volumetric capacity of the device.

(1) Note. Included herein are devices where the force exerted by pressures within the working chamber act against the force exerted by the resilient mechanical means.