US PATENT SUBCLASS 220 / 203.15
.~.~.~.~ Resilient sheetlike member retains separate vent closure

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}
203.11  DF  .~.~.~ Flexible, resilient vent closing member {4}
203.15.~.~.~.~ Resilient sheetlike member retains separate vent closure

DEFINITION

Classification: 220/203.15

Resilient sheetlike member retains separate vent closure:

(under subclass 203.11) Device wherein said vent closing member comprises a vent closure member or valve structure which is held in place by a separate, flexible sheetlike member, said vent closure member moving against said flexible sheet member in response to pressure.