Patent ID: 6866057

Claim:
A thermal-pressure relief device for pressure vessels that contains a compressible fluid comprising: an adapter having a first end and a second end with an orifice therethrough, the first end disposed within a pressure vessel wall in intimate contact with working fluid stored therein, the second end having a trepan shaped circular recessed cavity, larger in diameter than the orifice with a centrally positioned raised stem integrally formed therein, a blow out member, having a top, bottom and side edge, smaller in diameter than the circular recessed cavity and intimately engaging the raised stem of the cavity, overlaying said orifice so as to create an obstruction, ultimately preventing fluid flow through the orifice, and a temperature responsive amalgam disposed within the adapter circular recessed cavity contiguous with the blow out member bottom, side edge and top periphery, joining them together in a cohesive manner, providing a leakproof closure, disjoining at a predetermined external ambient temperature, relieving fluid pressure within the vessel as a safety measure to prevent an explosion due to excessive structural stress.