Abstract

A push-on pipe joint for connecting polyethylene water pipes comprises a hollow tubular body portion (1) having a central parallel-sided section (2) of internal diameter greater than that of the pipe and having a central inwardly extending pipe-stopping flange (5) for limiting insertion of the pipe, an inwardly tapered section (3) at each end of the central portion (1) and a further parallel sided end section (4) at the end of the tapered sections (3) of diameter such as to allow insertion of the pipe into the joint until it contacts the flange (5); a plurality of equidistantly spaced pipe- gripping members (7) inside the pipe joint and comprising a wedge section (11) having one surface (14) in sliding contact with the surface of the tapered section (3) and having ratchet teeth (18) on its opposite surface; means for forcing the wedge section (11) along the surface of the tapered section (3) to bring the ratchet teeth (18) into contact with, and to penetrate the surface of, the pipe; and a sealing ring ((9) located in a groove (8) towards the open end of the end sections (4) for forming a seal against the wall of a pipe inserted in the pipe joint.

IPC Classes  ?

• F16L 37/04 - Couplings of the quick-acting type in which the connection is maintained only by friction of the parts being joined with an elastic outer part pressing against an inner part by reason of its elasticity