Patent ID: 7472653

Claim:
A venting system for a casing for containing an explosive material, comprising: a base plug having a plurality of venting ports therein, said base plug including therein a generally ring-shaped indent, each of said plurality of venting ports being formed in a region of said base plug that is enclosed by said indent, said indent including a peripheral groove that extends into a wall portion of said base plug; and a failure mechanism mounted to said base plug and arranged to seal each of said plurality of venting ports, said failure mechanism being formed as a generally ring-shaped device that includes a peripheral tab arranged to extend into said peripheral groove to facilitate secure mounting of said failure mechanism to said base plug, said failure mechanism having a selected melting temperature such that exposure of said casing to an environment having a temperature that causes said failure mechanism to melt unseals each of the plurality of venting ports to allow controlled burning of said explosive material.