US PATENT SUBCLASS 73 / 257
.~.~.~.~ Single stationary abutment


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  DF  .~.~.~ With orbital movement {2}
257.~.~.~.~ Single stationary abutment {1}
258  DF  .~.~.~.~.~> Nutating piston


DEFINITION

Classification: 73/257

(under subclass 255) Meters having a single stationary abutment for cooperation with the piston.