Patent ID: 6773040
Filing Date: 2004-08-10
Classification: F16L

Abstract:
A spacer-less type pipe joint comprising:a press ring which has a protruding portion at its outer periphery and is fitted to an outer periphery of one end side of a jointed pipe; a joint main body which includes i) a protruding portion opposing said protruding portion of said press ring at side opposing said press ring and ii) a receiving opening portion which is widened outward toward said press ring at an inner periphery of the protruding portion of said joint main body so as to be fitted to the outer periphery of said jointed pipe with a peripheral clearance being formed there-between; a securing tool which moves said press ring in a direction toward said joint main body; and a single packing ring which is provided between said joint main body and said jointed pipe and fitted into said receiving opening portion by its elastic deformation caused by being directly pressed by the movement of said press ring by operation of said securing tool, wherein said single packing ring is integratedly formed of a distal end portion at a side of the receiving opening portion and a basal portion at a side of the press ring, at an outer periphery of said distal end portion, said packing ring has a diameter which is substantially the same as diameter of an entrance of said receiving opening portion such that said distal end portion is temporarily fixed to the entrance of said receiving opening portion without substantially touching an outer periphery of the jointed pipe, at an outer periphery of said basal portion, said packing ring has a diameter larger than the diameter of the outer periphery of said distal end portion only at a portion connecting to said distal end portion to form a stopper abutting against a peripheral edge outer surface continuing from a peripheral edge of the entrance of said receiving opening portion, wherein both the stopper and the distal end portion are temporarily fitted onto the peripheral edge of the entrance, and an outer periphery of said basal portion continuing from the stopper of said packing ring has a diameter larger than the diameter of the entrance of said receiving opening portion.