Pipes and tubular conduits – Repairing
Patent
1975-02-18
1976-12-14
Stephan, Steven L.
Pipes and tubular conduits
Repairing
156 94, 156287, 427238, F16L 5518, B32B 3500
Patent
active
039969673
ABSTRACT:
A method for repairing ruptured or otherwise damaged or weakened large diameter pipes such as underground water or sewer pipes, includes opening the opposite ends of the pipe to provide access, cleaning debris from within the pipe and smoothing its inside surface. A peripherally expandable fibrous web reinforced synthetic organic resinous tube which is either thermoplastic or thermosetting and in an uncured state is inserted in the pipe and clamp to the ends thereof by end plates and expanded into tight engagement with the pipe wall by circulating hot pressurized air through the tube. The interface of the pipe and tube may be provided with a heat sensitive adhesive and where the tube resin is thermosetting, the hot air is maintained until curing or setting is effected. Thereafter the repaired pipe is flange reconnected to the opposite end pipes.
REFERENCES:
patent: 2564602 (1951-08-01), Hurst
patent: 2690769 (1954-10-01), Brown
patent: 3123101 (1964-03-01), Blount et al.
patent: 3261374 (1966-07-01), Anderson et al.
patent: 3602263 (1971-08-01), Bremmer
Stephan Steven L.
Takata Kojyo Co. Ltd.
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