Patent ID: 6227577
Filing Date: 2001-05-08
Classification: F16L

Abstract:
A housing type coupling comprising:a pair of semi-circular coupling segments each having a space for receiving end parts of two pipes each provided with a circumferential groove defined by at least a side surface nearer to the end of the pipe and a side surface farther from the end of the pipe;a sealing elastic ring placed in the space defined by the pair of semi-circular coupling segments to create a nonleaking union between the ends of the two pies; andfastening means for fastening together the pair of semi-circular coupling segments;wherein each of the semi-circular coupling segments has pipe fastening parts respectively on the opposite sides of the space,the pipe fastening parts have opposite end sections with respect to a circumferential direction, and extend radially inward into the circumferential grooves of the two pipes, respectively,one of the pipe fastening parts of the semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of one of the pipes nearer to the end of the same pipe in one of the end sections thereof with respect to a circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe farther from the end of the same pipe in the other end section thereof with respect to the circumferential direction,the other pipe fastening part of the same semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of the other pipe farther from the end of the same pipe in one of the end sections thereof with respect to the circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe nearer to the end of the same pipe in the other end section thereof with respect to the circumferential direction, andthe protrusion formed on the pipe fastening part having an arc shape conforming to a shape of the circumferential groove of the pipe.