Thermally activated pressure relief plug

A relief plug for mounting in the wall of an internally pressurized structure comprising

• a tubular metallic body having a chamber therein and an opening in at least one end of the body in communication with the chamber,
• means for mounting the body on a pressurized structure with the body opening adjacent to and exposed to the inside of pressurized structure,
• means closing the body opening including an annular metallic support member having first and second annular end flanges and with an opening therethrough positioned in the body opening, a metal disk member positioned closing the opening through the support member, and means including a solder substance having a predetermined melt temperature releasably attaching the disk member to the support member closing the body opening, the metallic support member being positioned in the body opening in position such that the disk member and the solder substance are exposed directly to the environment inside the pressurized structure whereby release of the disk member from the support member occurs when the temperature in the pressurized structure reaches the melt temperature of the solder substance.

A temperature actuatable relief plug assembly for mounting in a port in a pressurized structure to provide pressure relief for the structure when the temperature of the gases in the pressurized structure exceeds some predetermined temperature, the assembly including a metallic body having a portion for mounting in the port in the pressurized structure and a portion extending externally therefrom, the metallic body having a chamber therein and an opening communicating the chamber with the interior of the pressurized structure, a temperature actuated structure closing the opening in the body and exposed to the temperature of the gases in the pressurized structure, the temperature actuated structure including an annular member having an outwardly extending flange at one end, an inwardly extending flange at the other end, and an opening therethrough defined by the inwardly extending flange, a disk member having an edge portion in abutment with the inwardly extending flange, a solder substance meltable at the predetermined temperature releasably soldering the disk member to the inwardly extending flange and, exposed to the environment in the pressurized structure so that the disk member will be released from the annular member when the temperature in the pressurized structure reaches the melt temperature of the solder substance.

A relief plug for mounting in the wall of a pressurized structure comprising

• a tubular metallic body having a chamber therein and an opening in at least one end of the body in communication with the chamber,
• means for mounting the body on a pressurized structure with the body opening exposed to the inside of the pressurized structure,
• means closing the body opening including a metallic support member having an outwardly extending annular flange at one end, an inwardly extending annular flange at the opposite end, with an opening therethrough positioned in the body opening, a metal disk member positioned closing the opening through the support member, the metallic disk member having a peripheral portion in surface to surface contact with the inwardly extending annular flange, and means including a solder substance having a predetermined melt temperature positioned between the disk member and the support member for soldering the members together closing the body opening.

A relief plug for mounting in the wall of a pressurized structure comprising

• a tubular metallic body having a chamber therein and an opening in at least one end of the body in communication with the chamber,
• means for mounting the body on a pressurized structure with the body opening exposed to the inside of the pressurized structure,
• means closing the body opening including a metallic support member with an opening therethrough positioned in the body opening, a metal disk member positioned closing the opening through the support member, means including a solder substance having a predetermined melt temperature positioned between the disk member and the support member for soldering the members together closing the body opening, and a layer of thermal insulating material positioned between the metallic support member and the tubular metallic body.

A relief plug for mounting in the wall of a pressurized structure comprising

• a tubular metallic body having a chamber therein, an opening in at least one end of the body in communication with the chamber, and a cylindrical counterbore located in the opening extending into the body opening from one thereof,
• means for mounting the body on a pressurized structure with the body opening exposed to the inside of the pressurized structure,
• means closing the body opening including a metallic support member with an opening therethrough positioned in the cylindrical counterbore, a metal disk member positioned closing the opening through the support member, and means including a solder substance having a predetermined melt temperature positioned between the disk member and the support member for soldering the members together closing the body opening.