Patent ID: 8109540

Claim:
A spigot member for a pipe joint, the spigot member comprising: a tubular plastic body wall having an internal surface and an external surface and a longitudinal axis; a metal reinforcement encased within the tubular plastic body wall; a plurality of plastic ribs extending from the external surface of the tubular plastic body wall and forming a gasket channel, including a first circumferentially extending solid plastic rib, a second circumferentially extending solid plastic rib spaced apart from the first circumferentially extending solid plastic rib, and a third circumferentially extending solid plastic rib positioned between the first circumferentially extending solid plastic rib and the second circumferentially extending solid plastic rib, the third circumferentially extending solid plastic rib defining a rib diameter that is smaller than respective rib diameters defined by each of the first circumferentially extending solid plastic rib and the second circumferentially extending solid plastic rib.