Method and apparatus for sealing large diameter pipes

Details Method and apparatus for sealing large diameter pipes Method and apparatus for sealing large diameter pipes

1974-11-08

1976-04-20

Aegerter, Richard E.

Pipes and tubular conduits

Repairing

138 93, F16L 5518

Patent

active

039511731

ABSTRACT:
An inflatable packer positionable in the interior of pipes for packing a sealant material into a void or joint in the pipe wall. Inflatable outer casings mounted on a support rim are utilized to seal off the area surrounding the void or joint. The support rim is constructed in sections which can be transported through a relatively small opening and utilized in a large diameter pipe. Sealant material injected into an open channel between the casings is forced into the void or joint by inflating an inner casing positioned between the outer casings. A flexible liner positioned between the sealant material and the inflatable casings prevents the sealant from adhering to the inflatable casings.

REFERENCES:
patent: 2843154 (1958-07-01), Hosking
patent: 3103235 (1963-09-01), Stringham
patent: 3269421 (1966-08-01), Telford et al.
patent: 3593749 (1971-07-01), Reardon
patent: 3750711 (1973-08-01), Conklin et al.
patent: 3834422 (1974-09-01), Larson

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