Method for remotely lining conduits

Details Method for remotely lining conduits Method for remotely lining conduits

1991-04-05

1993-04-06

Bryant, III, James E.

Pipes and tubular conduits

Repairing

Patches

138 93, 264269, 156287, 405154, F16L 100

Patent

active

051994631

ABSTRACT:
A conduit is lined by pressing a liner into contact with the conduit and making it self-supporting. It is transported to the working site (at which its two ends are not at manholes or excavations entering the conduit) on a core with an inflator bag. The core can be made flexible to assist entry to the conduit and rigid to provide transport along the conduit. The bag is inflated at the site to press the liner into contact with the conduit. The liner is made self-supporting by curing an impregnating resin or by sticking it to the conduit. The bag is deflated and the core is removed. The bag may have a limited response to inflation pressure so it does not balloon into voids in the conduit wall. It may have a progressive response to inflation pressure so that it expands from its mid-point towards its ends.

REFERENCES:
patent: 1605782 (1926-11-01), Rota
patent: 2312993 (1943-03-01), Stephens
patent: 3363301 (1968-01-01), Delaruelle
patent: 4009063 (1977-02-01), Wood
patent: 4848407 (1989-07-01), Smith et al.
patent: 5049003 (1991-09-01), Barton

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