US PATENT SUBCLASS 73 / 861.55
.~.~.~.~ Cone and ball or disk

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}
861.53  DF  .~.~.~ Automatically variable restriction {3}
861.55.~.~.~.~ Cone and ball or disk {2}
861.56  DF  .~.~.~.~.~> With structure of coupling to indicator
861.57  DF  .~.~.~.~.~> With structure of float, float tube, or float guide

DEFINITION

Classification: 73/861.55

Cone and ball or disk:

(under subclass 861.53) Subject matter wherein the effective area of the restriction is varied by relative movement of a ball, disk or like member (e.g., float) with respect to a cone or tapered cylinder.