US PATENT SUBCLASS 220 / 203.25
.~.~.~.~.~ Annular sealing member deflects along axis perpendicular to surface

Current as of: June, 1999
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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
202  DF  .~ With condition responsive vent or valve {1}
203.01  DF  .~.~ Responsive to pressure {10}
203.23  DF  .~.~.~ Spring-biased, axially translating member {2}
203.24  DF  .~.~.~.~ Two-way pressure relief valve {2}
203.25.~.~.~.~.~ Annular sealing member deflects along axis perpendicular to surface

DEFINITION

Classification: 220/203.25

Annular sealing member deflecting along axis perpendicular to surface:

(under subclass 203.24) Device wherein in addition to the spring-biased, axially translating member, a flexible, washerlike sealing member is provided which generally spans the vent or valve opening, and which deflects inwardly or outwardly with respect to the closure in response to pressure.