US PATENT SUBCLASS 73 / 243
.~.~.~ Duplex

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}
239  DF  .~.~ Reciprocating piston or cylinder {8}
243.~.~.~ Duplex {2}
244  DF  .~.~.~.~> Wobble plate or cam
245  DF  .~.~.~.~> With transverse shaft {1}

DEFINITION

Classification: 73/243

(under subclass 239) Meters having at least two cylinders, each provided with a piston and a valve or valves for distributing the fluid to be metered to cause the pistons to reciprocate, the valve or valves for one cylinder being moved wholly or partially in consequence of movement of the piston in the other cylinder.

SEE OR SEARCH THIS CLASS, SUBCLASS:

264, for duplex, multiple diaphragm type.

SEE OR SEARCH CLASS

91, Motors: Expansible Chamber Type,

191+,.