Pipe joint for preventing separation

Claim 1

A pipe joint for preventing separation wherein an annular packing is provided between a packing seat formed on the inner periphery of a socket and the outer periphery of a spigot, the pipe joint comprising: a plurality of circular arc housings connected together in the form of an annular ring and surrounding the spigot outer periphery outside the socket, each housing comprising a first portion having a radially inwardly extending lip at one axial end thereof and a radial web at the other axial end thereof remote from the socket end face, and a second portion extending axially from the inner end of said radial web away from the socket end face, said second portion being provided on its inner periphery with a tapered surface increasing in diameter toward the socket end; an annular outer flange formed on the end of the socket and engageable by said radially inwardly extending lips of the housing first portions; a stopper in the form of a ring divided at one location and interposed between the inner peripheral tapered surfaces of the housing second portions and the spigot outer periphery immediately inwardly of the radial webs of the housing first portions, said stopper being provided with engaging edge means in a plurality of circumferential rows on its inner periphery and with an outer peripheral tapered surface increasing in diameter toward the socket end and adapted to be in wedging engagement with the inner peripheral tapered surfaces of the housing second portions; and tap bolts extending through the housing second portions for pressing the stopper from outside against the spigot outer periphery, and radial recesses formed on the surfaces of said radial webs of the housing first portions, said radial recesses being opposed to said tap bolts.