Patent ID: 9044900
Filing Date: 2015-06-02
Classification: B29C,B29D,B29K,B29L,F16L,Y10T

Abstract:
1. A method for joining pipes, said method comprising the steps of: i. forming an unadhered pipe assembly comprised of a first pipe having a socket with an inside diameter, where said socket has a mouth that is an open end of the socket, a self-centering bottom and a substantially cylindrical wall, the substantially cylindrical wall having an inlet and an outlet and an inner annular channel, wherein the inlet and outlet are longitudinally offset from each other; and a second pipe inserted into and abutted against the bottom of the socket of the first pipe, said second pipe having an outer annular channel and an end, and said second pipe having an outside diameter that is less than the inside diameter of the socket, where the difference in diameters defines a longitudinally extending gap and where, when inserted into the first pipe, the outer annular channel of the second pipe and the inner annular channel of the first pipe are aligned with each other to form an interlocking keyway at one end of the longitudinally extending gap, wherein only the inlet is located at the interlocking keyway and wherein the inlet is in fluid communication with the outlet via the interlocking keyway and the longitudinally extending gap; and ii. extruding an extrudable adhesive through the inlet to initially fill the interlocking keyway, then to fill the longitudinally extending gap, and then overflowing out the outlet, wherein the interlocking keyway creates an avenue for the extruded adhesive to distribute evenly around the circumference of the insertion section and then along the longitudinally extending gap, and wherein said adhesive solidifies to form a mechanical key in the interlocking keyway and to join the first and second pipes.