US PATENT SUBCLASS 73 / 250
.~.~.~ With piston or rod actuated valve gear

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
250.~.~.~ With piston or rod actuated valve gear {1}
251  DF  .~.~.~.~> With trip gear

DEFINITION

Classification: 73/250

(under subclass 239) Meters having a distributing valve mechanism actuated by the piston, piston rod, or a part rigidly attached thereto. This subclass includes piston meters wherein the distributing valves are actuated

electrically or by other power means under control of the piston in its movement.

SEE OR SEARCH CLASS

91, Motors: Expansible Chamber Type,

218+,.