Patent ID: 7338089

Claim:
A pipe interruption fitting used for interrupting fluid flow in a pipe for conducting pipe maintenance work, comprising: an upper reinforcing plate having a circumferential inner surface with a curvature adapted to a curvature of a circumferential outer surface of the pipe; a short vertical pipe welded to said upper reinforcing plate; an adaptor welded to an end of said vertical pipe remote from said upper reinforcing plate and including an outer side surface having an inclined surface at a position closer to said vertical pipe and having a vertical surface at a position remote from said vertical pipe, wherein said adaptor has a plurality of bolt holes formed in an upper surface thereof remote from said vertical pipe, a through hole having an inner diameter equal to an inner diameter of said vertical pipe, and an annular groove formed in an inner surface of said through hole; a flange removably coupled to the upper surface of said adaptor by bolts fastened into said bolt holes of said adaptor, wherein a plurality of coupling holes are formed in said flange so that a boring machine or a stopple machine can be coupled to said flange; a plug adapted to be seated in said through hole of said adaptor and including an expansion plate adapted to be inserted into said annular groove of said through hole of said adaptor, and a cover adapted to be inserted into said through hole of said adaptor onto an end of said plug remote from said upper reinforcing plate, wherein said cover is adapted to be welded to said adaptor.