Method and device for repairing or reinforcing an...

Details Method and device for repairing or reinforcing an... Method and device for repairing or reinforcing an...

2007-07-10

2007-07-10

Lagman, Frederick L. (Department: 3673)

Hydraulic and earth engineering

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

Repair, replacement, or improvement

C405S184100, C138S097000

Reexamination Certificate

active

11452530

ABSTRACT:
A method for reinforcing or repairing a pipe pulls a liner assembly with a flexible smooth bore liner and a semi-rigid helix that gives non-collapsible characteristics within the damaged pipe for both linear pipe sections and curved pipe sections. The existing pipe is first cleaned with a specially designed brush with two wooden spheres at each end of the brush to prevent snagging or jamming during brush operations. The liner assembly is then pulled through the total length of the pipe and anchored at each end with retaining sleeves, which are sandwiched and glued within the liner assembly and the inside diameter of the existing pipe.

REFERENCES:
patent: 4678370 (1987-07-01), Allen
patent: 4867203 (1989-09-01), Putter
patent: 5241993 (1993-09-01), Stephens
patent: 5395472 (1995-03-01), Mandich
patent: 5427154 (1995-06-01), Stephens
patent: 6062264 (2000-05-01), Dickson
patent: 7137757 (2006-11-01), Cosban
patent: 2088516 (1982-06-01), None

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