Patent ID: 7219934

Claim:
A pipe coupling for coupling the ends of pipe sections together end to end, said coupling comprising: a barrel member adapted to bridge and surround the ends of said pipe sections; at least one coupling member, adapted to engage a first end of said barrel member; at least one elastomeric sealing ring disposed between said first end of said barrel member and said at least one coupling member, said sealing ring configured to expand radially outward and inward to form a sealing engagement within said first end of said barrel member and around a circumference of at least one of said pipe sections; a substantially tangentially extending bolt coupling said at least one coupling member to said barrel member; and an interaction means, located on an inside of said at least one coupling member, and on an outside of said barrel member, to interact and progressively twist the at least one coupling member along said barrel member to force said sealing ring into sealing engagement within said barrel member and around the circumference of each of said pipe sections.