US PATENT SUBCLASS 73 / 271
.~.~.~.~ With fluid actuated valve

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}
262  DF  .~.~ Diaphragm or collapsible wall {2}
269  DF  .~.~.~ Single diaphragm {2}
271.~.~.~.~ With fluid actuated valve

DEFINITION

Classification: 73/271

(under subclass 269) Meters wherein the valves controlling the induction and eduction of the measuring chambers are actuated by pressure of the metered fluid when a definite pressure builds up behind the diaphragm at the end of its stroke.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220, and 249, for other fluid operated valve combinations.