US PATENT SUBCLASS 73 / 861.61
.~.~.~ Orifice or flow nozzle

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

861  DF  VOLUME OR RATE OF FLOW {23}
861.42  DF  .~ Using differential pressure {6}
861.52  DF  .~.~ With restriction {4}
861.61.~.~.~ Orifice or flow nozzle {1}
861.62  DF  .~.~.~.~> Adjustable

DEFINITION

Classification: 73/861.61

Orifice or flow nozzle:

(under subclass 861.52) Subject matter wherein the means producing the differential pressure is an opening (as a vent, mouth or hole) through which the fluid passes or a tube having a taper or constriction (e.g., nozzle).