Patent ID: 7360797
Filing Date: 2008-04-22
Classification: F16L,Y10T

Abstract:
1. A coupling assembly comprising: a first pipe, including a first liner inserted within the first pipe, with external threads extending along a portion of a first end of the first pipe; a second pipe, including a second liner inserted within the second pipe, with external threads extending along a portion of a second end of the second pipe; a coupling member, with internal threads provided at a first end and a second end of the coupling member and an unthreaded portion extending between the first end and the second end, fixedly connecting the first pipe and the second pipe; a first ring member configured to cooperate with and overlap the first liner, the first ring member comprising a first end configured to cooperate with the first liner and a second end; a second ring member configured to cooperate with and overlap the second liner, the second ring member comprising a first end configured to cooperate with the second liner, a second end, and an extended body member between the first and second ends, the extended body member positioned in contact with the unthreaded portion of the coupling member; and a corrosion barrier ring disposed between and cooperating with the first ring member and the second ring member, the corrosion barrier ring comprising opposing indented ends cooperating with the second ends of the first and second ring members; wherein the second ends of the first and second ring members define corresponding registering shapes to cooperate with the opposing indented ends of the corrosion barrier ring.