US PATENT SUBCLASS 220 / 203.01
.~.~ Responsive to pressure

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.~.~ Responsive to pressure {10}
203.02  DF  .~.~.~> In each of plural, isolated passages
203.03  DF  .~.~.~> Liquid trap
203.04  DF  .~.~.~> Manually adjustable {2}
203.08  DF  .~.~.~> Rupturable
203.09  DF  .~.~.~> Relatively movable closure and receptacle rim parts {1}
203.11  DF  .~.~.~> Flexible, resilient vent closing member {4}
203.19  DF  .~.~.~> Specified valve structure provides a diverse function (e.g., leakage preventing, lock releasing) {3}
203.23  DF  .~.~.~> Spring-biased, axially translating member {2}
203.28  DF  .~.~.~> Two-way pressure relief valve
203.29  DF  .~.~.~> One-way, outwardly venting pressure relief valve

DEFINITION

Classification: 220/203.01

Responsive to pressure:

(under subclass 202) Device wherein the vent or valve is operable as a result of a variation in pressure occurring within or without the receptacle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

89.1+, for an attachment to a container including means to relieve excess pressure.

231, for means provided in the closure for breaking a vacuum within a closed receptacle, but where said means are not pressure responsive.

360, for a receptacle provided with a vent or valve through a wall of the receptacle, and a closure is provided with means to regulate said vent or valve.

367.1+, for a receptacle closure comprising a nonpressure responsive vent or valve.

SEE OR SEARCH CLASS 215, Bottles and Jars,

260, for a pressure responsive valve in a closure for a receptacle of the bottle, jar, or jug type.

222, Dispensing,

491+, for a dispenser having a movable outlet element operated by the pressure of the container contents.

383, Flexible Bags,

100+, for a flexible bag comprising pressure relief means.

426, Food or Edible Material: Processes, Compositions, and Products,

118, for a package containing food, wherein the package comprises means to release gases produced by the food.