Pipe joint packing ring having means limiting assembly movement

Claim 1

A pipe connection comprising spigot and socket pipe joint parts constructed to provide for telescoping and separation thereof by relative axial motion, the socket part having an annular channel formed in its inside wall, the spigot part having a cylindrical surface in the region of said channel of smaller diameter than the inside of the socket to provide an annular space between the joint of the spigot part having a shoulder presented inwardly of the joint and spaced inboard of the annular channel in the socket part and the spigot part being extended inboard of said shoulder and having a beveled end spaced inwardly of said shoulder, and a resilient pipe joint ring between the joint parts, the ring having a sealing portion in compression between the base of the annular channel in the socket part and said cylindrical surface on the spigot part and the ring having a flange extended inwardly from the radially inner edge of the sealing portion in said annular space between the socket and spigot parts, said flange having an enlarged portion at its inner or free edge located inboard of said shoulder and serving as an abutment limiting telescoping movement of the spigot into the socket, said enlarged portion being in compression between the socket and the part of the spigot extended inboard of said shoulder.