Method for lining a branch pipe of an underground pipe

Details Method for lining a branch pipe of an underground pipe Method for lining a branch pipe of an underground pipe

1995-03-03

1996-10-22

Scherbel, David

Pipes and tubular conduits

Repairing

Patches

138 97, 156287, F16L 5516

Patent

active

055667198

ABSTRACT:
A method is proposed for lining a branch pipe from the main pipe; in particular a special sealing mechanism is adopted in attaching the collar of a liner bag onto the flange of a fluid pressure sealing nozzle: stopper tacks are embedded in the collar at appropriate locations, each of the stopper tacks having its bottom end exposed from the back face of the collar and connected with a string; the back face of the collar of the branch pipe liner bag is faced with the upper face of the flange of the fluid pressure sealing nozzle, which comprises a hollow cylindrical part, the flange extending perpendicularly from the side of the cylindrical part, at least one endless sealant laid on the upper face of the flange, and a string puller provided in the flange; the strings are engaged with the string puller; the string puller pulls the strings so that the collar and the flange are moved toward each other until sufficient sealing effect is obtained.

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: 4893389 (1990-01-01), Allen et al.
patent: 5329063 (1994-07-01), Endoh
patent: 5439033 (1995-08-01), Kamiyama et al.

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