Method of salvaging a pipe conduit buried under ground

Details Method of salvaging a pipe conduit buried under ground Method of salvaging a pipe conduit buried under ground

1986-11-13

1987-12-22

Bryant, III, James E.

Pipes and tubular conduits

Repairing

Patches

138 97, 138105, 156287, 264 35, F16L 5516, B29C 1700

Patent

active

047140950

ABSTRACT:
A method of salvaging a pipe conduit which is buried under ground, especially a sewer pipe, includes soaking a resin-absorbing inner layer of a lining hose, which further includes an impermeable outer layer that outwardly adjoins and surrounds the inner layer, with a first resin. The lining hose is then placed into the pipe conduit. A surface region of a calibrating hose which is to contact the inner layer of the lining hose is provided with a layer containing a second resin. The lining hose is then shaped to conformingly line the pipe conduit. Such shaping involves introducing the calibrating hose into the lining hose in such a manner that the resin-containing layer of the calibrating hose contacts the inner layer of the lining hose and pressing the calibrating hose against the lining hose to urge the latter against the pipe conduit. Finally, at least one of the first and second resins is hardened. Preferably, the other resin contains a substance which chemically reacts with at least the one resin to cause the same to harden during the hardening step upon contact of the resin-containing and inner layers.

REFERENCES:
patent: 2312993 (1943-03-01), Stephens
patent: 4064211 (1977-12-01), Wood
patent: 4135958 (1979-01-01), Ossett
patent: 4273605 (1981-06-01), Ross
patent: 4456401 (1984-06-01), Williams
patent: 4581085 (1986-04-01), Wood
patent: 4602974 (1986-07-01), Wood et al.
patent: 4637754 (1987-01-01), Wood
patent: 4640313 (1987-02-01), Stanley

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