US PATENT SUBCLASS 137 / 852
.~.~.~ With valve member flexing about securement

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.~.~.~ With valve member flexing about securement {4}
853  DF  .~.~.~.~> Sleeve
854  DF  .~.~.~.~> Central mount
855  DF  .~.~.~.~> Flap or reed {3}
859  DF  .~.~.~.~> Peripherally secured diaphragm

DEFINITION

Classification: 137/852

(under subclass 843) Valve wherein a portion of the resilient member is fixed to a substantially rigid mounting means about which at least part of the remainder of the resilient member bends or distorts towards or away from contact with a valve seat with which the resilient member coacts to produce a desired valving action upon variations in fluid pressure.