US PATENT SUBCLASS 73 / 254
.~.~.~ With compensating bypass

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

861  DF  VOLUME OR RATE OF FLOW {23}
232  DF  .~ Expansible chamber {6}
253  DF  .~.~ Rotary piston or cylinder {5}
254.~.~.~ With compensating bypass

DEFINITION

Classification: 73/254

(under subclass 253) Meters wherein a bypass, usually having a variable restriction, is placed across the metering chamber to compensate for losses caused by leakage, viscosity changes, etc.