US PATENT SUBCLASS 137 / 418
.~.~.~ Over center mechanism

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.~.~.~ Over center mechanism {1}
419  DF  .~.~.~.~> Shifting weight

DEFINITION

Classification: 137/418

(under subclass 416) Apparatus in which the quick action of the flow controlling means is obtained by use of a mechanism which has a faster or accelerated rate of motion after it

passes a center position than its rate of motion before attaining the center position.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

75, for snap acting valves not of level or condition responsive types, and see the search notes thereto.