US PATENT SUBCLASS 137 / 845
.~.~.~.~ Apertured plate


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}
844  DF  .~.~.~ Having expansible port {2}
845.~.~.~.~ Apertured plate


DEFINITION

Classification: 137/845

(under subclass 844) Valve wherein the resilient body is a substantially flat plate-like member having an expansible orifice formed therethrough.