US PATENT SUBCLASS 73 / 276
.~.~.~ Check valve

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

861  DF  VOLUME OR RATE OF FLOW {23}
272 R  DF  .~ Element {7}
275  DF  .~.~ Antireversing mechanism {1}
276.~.~.~ Check valve

DEFINITION

Classification: 73/276

(under subclass 275) Elements wherein check valves are combined with meter structure to prevent reversing or running backward of the registering mechanism by preventing reverse flow through the meter.

SEE OR SEARCH CLASS

137, Fluid Handling,

511+, for check valves, per se.