US PATENT SUBCLASS 73 / 251
.~.~.~.~ With trip gear

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

DEFINITION

Classification: 73/251

(under subclass 250) Meters wherein the distributing valves are actuated by a force which is stored up and suddenly released through movement of the piston or piston rod.

SEE OR SEARCH THIS CLASS, SUBCLASS:

225, 270, for other combinations with valve trip gear.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

97, and 100 for snap actions, per se.

91, Motors: Expansible Chamber Type, 338,.

251, Valves and Valve Actuation,

75, for valve actuation with snap action.