US PATENT SUBCLASS 220 / 316
.~.~ With internal pressure-condition release

Current as of: June, 1999
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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
315  DF  .~ Having means for securing or retaining closure in its closed position (e.g., fastening devices) {8}
316.~.~ With internal pressure-condition release

DEFINITION

Classification: 220/316

(under subclass 315) Device in which the securing members of the fastener are combined with internal pressure elements which block the movement of the member to closure releasing position while pressure remains in the receptacle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

203.19+, for a receptacle closure comprising a pressure responsive vent or valve which also acts as a lock releasing means.