Patent ID: 6398270
Filing Date: 2002-06-04
Classification: F16L,Y10S

Abstract:
A corrugated pipe joint for coupling corrugated pipes including, at least two joint components, each of which comprises:a joint main body made of a synthetic resin and including an arc-shaped portion and tightening projecting edges which are outwardly projected from circumferential end portions of said arc-shaped portion in a radial direction of said corrugated pipes to be coupled, wherein engagement projections are formed on an inner circumferential surface of each of axial end portions of said joint main body so as to be engageable with a root portion of one of said corrugated pipes, and wherein axially elongated projections and tightening bolt holes are formed on each of said tightening projecting edges; and a watertightness-implementing packing made of an elastic material and assembled with said joint main body, said watertightness-implementing packing including an arc-shaped portion and flange edges projecting outwardly from circumferentially end portions of said arc-shaped portion in the radial direction, wherein axially extending depressed grooves are formed in back sides of said flange edges so as to be fittingly engageable with said elongated projections on said joint main body respectively, wherein when said at least two joint components are coupled with one another, a surface portion of said flange edge which is disposed at a front side opposed to said depressed groove and is disposed closest to the adjacent joint component is closer to said adjacent joint component by a predetermined a distance than a surface portion of said projecting edge of said joint main body which is closest to said adjacent joint component.