Pipework

Details Pipework Pipework

1982-04-22

1984-03-06

Shepperd, John W.

Pipes and tubular conduits

Repairing

138 98, 1510409, 1510412, 166 55, 408 80, 408 83, 408130, F16L 5518

Patent

active

044348150

ABSTRACT:
Apparatus is described for insertion into a branch pipe to cut an aperture in a liner provided within the main pipe for repairing the latter. The apparatus has a body together with a cutting device and a clamping member (e.g. an inflatable sleeve) both supported by the body. Means are provided for actuating the clamping member so that it presses against the inside of the branch pipe and jams the body in a fixed position within the branch pipe. The cutting device may be advanced relative to the body, to cut an aperture in the liner. Also described is an inflatable plug which may be used to provide a seal so that a grouting operation may be performed without grout being able to escape into the branch pipe or into the interior of the liner.

REFERENCES:
patent: 1941222 (1933-12-01), Pew et al.
patent: 2742259 (1956-04-01), Boucher
patent: 3587194 (1971-06-01), Brown
patent: 3618639 (1971-11-01), Daley
patent: 3740785 (1973-06-01), Latall
patent: 3762446 (1973-10-01), Tungseth et al.
patent: 3835889 (1974-09-01), Hyde
patent: 3841355 (1974-10-01), Laner
patent: 3899265 (1975-08-01), Lang
patent: 3950461 (1976-04-01), Levens
patent: 4197908 (1980-04-01), Davis
patent: 4245970 (1981-01-01), St. Onge

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