US PATENT SUBCLASS 137 / 419
.~.~.~.~ Shifting weight

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

386  DF  LIQUID LEVEL RESPONSIVE OR MAINTAINING SYSTEMS {11}
409  DF  .~ By float controlled valve {11}
416  DF  .~.~ Quick acting {4}
418  DF  .~.~.~ Over center mechanism {1}
419.~.~.~.~ Shifting weight

DEFINITION

Classification: 137/419

(under subclass 418) Apparatus wherein the change in rate of motion is obtained by the use of a shifting weight.

SEE OR SEARCH THIS CLASS, SUBCLASS:

424+, for float controlled valves with counterbalance means.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

338, for weight biased valves, and see the search notes thereto.