US PATENT SUBCLASS 137 / 543
.~.~.~.~.~.~ Yoke or cage-type support for 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}
528  DF  .~.~ Reciprocating valves {5}
535  DF  .~.~.~ Spring biased {5}
540  DF  .~.~.~.~ Spring coaxial with valve {9}
542  DF  .~.~.~.~.~ Valve stem extends through fixed spring abutment {1}
543.~.~.~.~.~.~ Yoke or cage-type support for valve stem

DEFINITION

Classification: 137/543

(under subclass 542) Valves which provide a transverse support for the valve stem, spaced from the valve and supported in its location by a plurality of elongated, circumferentially spaced members parallel to the valve stem, the support usually comprising a spring abutment.