US PATENT SUBCLASS 73 / 255
.~.~.~ With orbital movement

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}
255.~.~.~ With orbital movement {2}
256  DF  .~.~.~.~> Plural stationary abutment
257  DF  .~.~.~.~> Single stationary abutment {1}

DEFINITION

Classification: 73/255

(under subclass 253) Meters in which the piston rotates relatively to its axis while the axis moves in an orbit. This subclass also includes meters wherein a point on the piston constantly faces the same direction while the axis rotates.

SEE OR SEARCH CLASS

418, Rotary Expansible Chamber Devices,

54+, for rotary expansible chamber devices in which the working.