Method of lining a branch pipe

Details Method of lining a branch pipe Method of lining a branch pipe

1994-07-14

1995-08-08

Scherbel, David A.

Pipes and tubular conduits

Repairing

Patches

138 97, 156287, F16L 5516

Patent

active

054390338

ABSTRACT:
A branch pipe lining method ensures a reliable air-tight connection between a branch pipe liner bag and a fluid pressure sealing nozzle with a simple structure so that the branch pipe liner bag can be inserted into a branch pipe without fail. A branch pipe liner bag impregnated with a hardenable resin and having a flange at one end thereof is used for the branch pipe repair. The flange of the branch pipe liner bag is folded out to be mounted to a fluid pressure sealing nozzle. A close contact between the flange and the fluid pressure sealing nozzle is held by vacuum pressure. The branch pipe liner bag is then everted and inserted from a main pipe into a branch pipe toward the ground by a fluid pressure. The branch pipe liner bag is pressed onto the inner wall of the branch pipe by a fluid pressure, and the hardenable resin impregnated in the branch pipe liner bag is hardened while the bag itself is kept pressed onto the inner wall of the branch pipe. In this manner, since an air-tight connection between the branch pipe liner bag and the fluid pressure sealing nozzle can be reliably provided by vacuum pressure, a high sealability is ensured between them with a simple structure, whereby the branch pipe liner bag is reliably inserted into the branch pipe.

REFERENCES:
patent: 4368091 (1983-01-01), Ontsuga et al.
patent: 4581085 (1986-04-01), Wood
patent: 4714095 (1987-12-01), Muller et al.
patent: 4724108 (1988-02-01), Jurgenlohmann et al.
patent: 4752511 (1988-06-01), Driver
patent: 4758454 (1988-07-01), Wood
patent: 4836715 (1989-06-01), Wood
patent: 5329063 (1994-07-01), Endoh

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