Resilient sealing ring

A seal for a socket type pipe joint formed between the spigot end of a pipe and the socket end of an adjoining pipe, said seal being in the form of a resilient sealing ring adapted to be located about said spigot end and slid into operative engagement within said socket end of the adjoining pipe for location, said ring including a locating portion adjacent its operative leading end having a transverse or radial dimension sufficient to operatively position said socket end and said spigot end in their operative substantially concentric relationship, and said ring tapering away from the inner face of said socket end towards said leading end and at the trailing end of said ring a pair of diverging annular fins each adapted to diverge towards a respective one of said inner surface of said socket end or the outer surface of said spigot end, and said ring having an abutment portion extending therearound and adapted to be engaged within a recess in said spigot end to fixedly locate said ring thereabout.

A seal according to any one of the preceding claims, wherein said abutment portion comprises an annular projection having a substantially rectangular cross-section and the radial dimension of said annular projection is substantially equal to or greater than forty percent of the gap between the respective inner and outer surfaces of the concentrically disposed socket end and spigot end of said pipes.