US PATENT SUBCLASS 73 / 237
.~.~.~ Reciprocating bell

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}
234  DF  .~.~ Wet type (e.g., liquid seal) {4}
237.~.~.~ Reciprocating bell

DEFINITION

Classification: 73/237

(under subclass 234) Meters wherein the bell is mounted to rectilinearly reciprocate into and out of the sealing liquid

to form therewith an expansible measuring chamber for the fluid to be metered.