US PATENT SUBCLASS 73 / 242
.~.~.~ Valveless

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}
242.~.~.~ Valveless

DEFINITION

Classification: 73/242

(under subclass 239) Meters wherein all events of the metering cycle of the expansible measuring chamber are controlled without the use of a valve distinct from the piston or the piston-rod and the cylinder.

SEE OR SEARCH CLASS

91, Motors: Expansible Chamber Type,

232+,.