Method and apparatus for point-repair of sewer and other utility

Details Method and apparatus for point-repair of sewer and other utility Method and apparatus for point-repair of sewer and other utility

1995-03-13

1996-10-15

Bagnell, David J.

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

138 98, F16L 5518

Patent

active

055648630

ABSTRACT:
The present invention is directed to a method and apparatus for making point-repairs in sewer and other utility lines. The method involves positioning a section of polyolefin, preferably polyethylene, pipe by drawing or pulling it into and through the undamaged portion of the damaged sewer line requiring repair and fixing or securing from the surface the section of polyolefin pipe into place. The present invention is also directed to point-repair collapsible heads and a point-repair insertion tool for assisting in the positioning of the section of polyolefin pipe into the damaged sewer line requiring repair by pulling the point-repair insertion tool which includes the section through the line to the place where repair is required and collapsing the heads and removing them by cable from the section and the damaged sewer line.

REFERENCES:
patent: 4170248 (1979-10-01), Bennett et al.
patent: 4728223 (1988-03-01), Rice
patent: 5364207 (1994-11-01), Reber et al.

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