US PATENT SUBCLASS 137 / 516.29
.~.~.~.~ Resilient gasket

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}
516.25  DF  .~.~ Plural seating {1}
516.27  DF  .~.~.~ Sequential {1}
516.29.~.~.~.~ Resilient gasket

DEFINITION

Classification: 137/516.29

(under subclass 516.27) Valves wherein a resilient gasket is provided at the seating surface and the deformation of the gasket provides one seating.