US PATENT SUBCLASS 73 / 220
.~.~.~ With fluid-pressure operated valve

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

861  DF  VOLUME OR RATE OF FLOW {23}
*  DD  .~ Tank type {3}
219  DF  .~.~ Plural measuring chamber {3}
220.~.~.~ With fluid-pressure operated valve

DEFINITION

Classification: 73/220

(under subclass 219) Meters wherein the inlet and discharge valves of the measuring chambers are actuated by pressure of the fluid to be metered when a definite static head of the fluid is accumulated in the respective measuring chambers.

SEE OR SEARCH THIS CLASS, SUBCLASS:

249, 271, for other fluid actuated valve combinations.