Patent ID: 7207605

Claim:
A coupling comprising: first and second generally tubular members each having a sealing end face, a raised, annular sealing bead, an inner bore, and a frictional surface located radially outward of said sealing bead, said tubular members being generally coaxially arranged such that said sealing faces face each other; and a sealing gasket captured between said sealing beads for sealing said coupling, wherein said frictional surface engages said sealing gasket to prevent relative rotation between said tubular members; said sealing gasket having two respective sides, wherein said sealing gasket includes a sealing surface on each of said respective sides of said gasket, each of said sealing surfaces contacting one of said sealing beads of said tubular members; and an anti-rotation surface on each of said respective sides of said gasket, each of said anti-rotation surfaces contacting one of said frictional surfaces of said tubular members, wherein each of said respective sealing surfaces and anti-rotation surfaces are co-planar prior to coupling make-up, wherein each of said frictional surfaces has raised protrusions.