Branch pipe liner bag and branch pipe lining method

Details Branch pipe liner bag and branch pipe lining method Branch pipe liner bag and branch pipe lining method

1999-02-10

1999-12-28

Brinson, Patrick

Pipes and tubular conduits

Repairing

Patches

138 97, 264269, 4051501, 156287, F16L 5516

Patent

active

06006787&

ABSTRACT:
A branch pipe liner bag is provided for reliably lining a branch pipe even having a curved portion. The branch pipe liner bag has a tubular resin-absorbent material having a flange formed at one end thereof, the outer surface of which is covered with a highly air-tight film. The tubular resin-absorbent material is impregnated with an unhardened hardenable resin, and a separable tube is attached to the flange. According to this invention, since the separable tube is attached to the previously hardened flange of the branch pipe liner bag, the separable tube will never be torn or cut even if the branch pipe liner bag is everted and inserted into a branch pipe having a curved portion with a high fluid pressure, or even if the film covering the branch pipe liner bag is heated and therefore softened by a heat medium or heat generated by the hardening of the thermosetting resin. It is therefore possible to reliably line a branch pipe even having a curved portion, using the branch pipe liner bag, and repair the branch pipe.

REFERENCES:
patent: 5329063 (1994-07-01), Endoh
patent: 5439033 (1995-08-01), Kamiyama et al.
patent: 5454401 (1995-10-01), Kamiyama et al.
patent: 5566719 (1996-10-01), Kamiyama et al.
patent: 5598873 (1997-02-01), Kamiyama et al.
patent: 5692543 (1997-12-01), Wood
patent: 5765597 (1998-06-01), Kiest, Jr. et al.

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