US PATENT SUBCLASS 137 / 514.7
.~.~.~.~ Enlarged piston on end of valve stem

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

455  DF  LINE CONDITION CHANGE RESPONSIVE VALVES {11}
511  DF  .~ Direct response valves (i.e., check valve type) {14}
514  DF  .~.~ With retarder or dashpot {2}
514.5  DF  .~.~.~ End of valve moves inside dashpot chamber {1}
514.7.~.~.~.~ Enlarged piston on end of valve stem

DEFINITION

Classification: 137/514.7

(under subclass 514.5) Devices wherein an enlarged member on the end of a valve stem reciprocates in a dashpot chamber.