US PATENT SUBCLASS 73 / 268
.~.~.~.~ With oscillating or reciprocating 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}
263  DF  .~.~.~ Multiple diaphragm {3}
268.~.~.~.~ With oscillating or reciprocating valve

DEFINITION

Classification: 73/268

(under subclass 263) Meters wherein the induction and/or eduction to the measuring chambers are controlled by slide valves of the oscillating or reciprocating type.