US PATENT SUBCLASS 73 / 234
.~.~ Wet type (e.g., liquid seal)

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.~.~ Wet type (e.g., liquid seal) {4}
235  DF  .~.~.~> Rotary drum
236  DF  .~.~.~> Oscillating bell or drum
237  DF  .~.~.~> Reciprocating bell
238  DF  .~.~.~> Nutating bell

DEFINITION

Classification: 73/234

(under subclass 232) Meters wherein the fluid to be metered is measured in an expansible chamber which is sealed off by a liquid continuously or at some part of the measuring cycle. These subclasses are not limited to gas meters and include devices for metering liquids of less density than the liquid employed as a seal.

SEE OR SEARCH CLASS

48, Gas: Heating and Illuminating,

176+, and 181+ for gas holders and feeders of similar structure.