Patent ID: 6123109
Filing Date: 2000-09-26
Classification: F16L

Abstract:
A branch pipe lining bag comprising a flexible tubular bag soaked with a hardenable liquid resin and adapted to be everted under fluid pressure into a branch pipe so as to extend upwardly from a main pipe toward the ground, a flange being adjoined to an open end of said tubular bag, an fluid-tight film bag in which said tubular bag is contained in a manner such that at least a most part of an outer face, before eversion, of the tubular bag is covered with said film bag, an annular protective member having a cylindrical portion fitting on an inner peripheral face of said flange and a brim portion spreading out from a mid part of the cylindrical portion, a lower part of the cylindrical portion protruding into said main pipe, and said brim portion being affixed on said flange.