US PATENT SUBCLASS 220 / 89.2
.~.~ Frangible pressure relief means

Current as of: June, 1999
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220 /   HD   RECEPTACLES

694  DF  CONTAINER ATTACHMENT OR ADJUNCT {21}
89.1  DF  .~ Pressure relief means {2}
89.2.~.~ Frangible pressure relief means {1}
89.3  DF  .~.~.~> With cutting means

DEFINITION

Classification: 220/89.2

Frangible pressure relief means:

(under subclass 89.1) Receptacle wherein the pressure relief means is a diaphragm or diaphragm-like device which bursts to relieve excess pressure within the container.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers,

506, for a liquid heater or vaporizer with a pressure controlled fire extinguisher.

137, Fluid Handling,

68.11+, for a frangible fluid-control element.

169, Fire Extinguishers, 19+, and 56+ for a fire extinguishing mechanism with a frangible control element.