Torsionally flexible metallic annular seal

摘要

A torsionally flexible annular seal in the form of a metallic, resilient sealing ring for a pair of concentric, hollow annular bodies having high pressure and temperature fluid flowing therethrough and having different thermal expansion rates and/or temperatures. The sealing ring comprises a central tapering portion, a first curvilinear sealing portion at one end of the central portion, and a second curvilinear sealing portion at the other end of the central portion. In one embodiment the central tapering portion is frustoconical, and in a second it has convex and concave portions. The first and second sealing portions seal against inner and outer cylindrical surfaces defined by the pair of annular bodies, this sealing including at least two circular sealing lines in different planes.