US PATENT SUBCLASS 137 / 854
.~.~.~.~ Central mount

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}
843  DF  .~.~ Resilient material valve {4}
852  DF  .~.~.~ With valve member flexing about securement {4}
854.~.~.~.~ Central mount

DEFINITION

Classification: 137/854

(under subclass 852) Valves in which the resilient member is secured at its center and the periphery flexes about said securement.