Patent ID: 8490273

Claim:
A method for inhibiting separation of a bell end and a spigot end of a pair of pipes, the bell end including a groove having a front wall and a retainer bead, the method comprising, disposing a gasket within the bell end, inserting the spigot end into the bell end and through the gasket thereby pivoting a metal segment embedded within the gasket about the retainer bead away from the front wall, and compressing a sealing portion of the gasket between the bell end and the spigot end, and partially withdrawing the spigot end from the bell end a first distance thereby pivoting the metal segment about the retainer bead toward the front wall, impinging at least one tooth of a row of teeth of the metal segment directly upon the spigot end, and forming a first load path, followed by partially withdrawing the spigot end from the bell end a second distance thereby shearing the retainer bead and forming a second load path.