Patent ID: 6948515

Claim:
A rupture disk assembly for use in a pressurized fluid passageway within an application environment having a temperature operational range, said disk assembly comprising: a) a cylindrical one-piece disk consisting essentially of unimpregnated graphite having a top surface and a planar bottom surface, wherein said bottom surface faces a pressurized source; b) a single bore extending partway into said top surface of the disk forming an integral rupturable portion and an annular support portion wherein an axial thickness of said integral rupturable portion is less than an axial thickness of said annular support portion; c) a casing circumferentially disposed about said disk; and d) a metallic layer overlying said planar bottom surface of said disk; e) wherein said disk assembly has a particular burst pressure that is generally temperature insensitive over essentially the entire said temperature operational range; f) wherein said burst pressure has a tolerance of about +/−5% over essentially the entire said temperature operational range.