Patent ID: 8408558

Claim:
An annular seal for use between a first and a second sliding member, the seal comprising: an annular ring formed of a metallic material, where the annular ring is sized and dimensioned to have: (a) an inner cylindrical surface coaxial with an outer cylindrical surface, (b) a width (W) in the range from 0.1 inches to 6 inches, and (c) an outer diameter (OD) in the range from 0.1 inches to 12 feet; a rib protruding from and circumferentially disposed on the outer surface wherein the rib has a surface that is configured to provide a sliding sealing surface with one of the first and the second sliding members, and wherein the surface of the rib has a rib width (RW) of less than 50% of the width (W); a first flange and a second flange extending approximately 90 degrees from the inner surface and wherein the first and second flanges each have a thickness that is substantially different than the rib width; and wherein the first flange and second flange have ends, each end having a surface coaxial with the inner cylindrical surface that is configured to provide a sliding sealing surface with one of the first and second sliding members.