초록 ▼

A pipe sealing gasket is shown which is designed to be received within a groove provided within a socket end of a thermoplastic pipe. The gasket has a ring shaped body of an elastomeric material and includes a metal reinforcing band. The metal reinforcing band has an angular profile, when viewed in

A pipe sealing gasket is shown which is designed to be received within a groove provided within a socket end of a thermoplastic pipe. The gasket has a ring shaped body of an elastomeric material and includes a metal reinforcing band. The metal reinforcing band has an angular profile, when viewed in cross-section, with an apex which is embedded within the gasket body but lies in close proximity to an exterior surface of the gasket. The apex provides a reinforced contact point during belling operations but is isolated from surrounding liquids passing through a pipe joint.

대표청구항 ▼

[ What is claimed is:] [1.] A pipe joint, comprising:a first pipe of thermoplastic material having a socket end including an internal annular groove and internal cylindrical surfaces on either side of the groove of substantially equal diameter;a second pipe having an insert end which mates with the

[ What is claimed is:] [1.] A pipe joint, comprising:a first pipe of thermoplastic material having a socket end including an internal annular groove and internal cylindrical surfaces on either side of the groove of substantially equal diameter;a second pipe having an insert end which mates with the socket end of the first pipe;a sealing gasket disposed within the groove wholly between the cylindrical surfaces concentrically between and sealingly engaging the pipe insert end and the pipe socket end, the gasket being a unitary ring formed of a body of elastically yielding material having a rigid circumferentially continuous band located within the gasket body; andwherein the band is a generally planar member having a centrally located apex and a pair of outwardly extending wing regions, the wing regions and apex, when viewed in cross-section, forming a roof-shaped profile for the band and wherein the outwardly extending wing regions are entirely embedded within the body of elastically yielding material, the apex of the band being located in proximity to an outer surface of the gasket body, whereby the apex provides a reinforced contact point during manufacture of the socket end of the pipe joint.