Pipes and tubular conduits – Repairing – Patches
Patent
1994-07-21
1995-02-14
Scherbel, David A.
Pipes and tubular conduits
Repairing
Patches
138104, 264269, F16L 5516
Patent
active
053886160
ABSTRACT:
An invertible tubular substrate of resin-permeated fibrous material is surrounded by an impermeable tubular film which, in turn, is surrounded by an impermeable tubular calibrating element. One end of the substrate is inserted into one end of a pipe which is to be lined from the inside, and the assembly of substrate, film and calibrating element is thereupon inverted into the pipe wherein the substrate is immediately adjacent the internal surface of the pipe and surrounds the film. The calibrating element is separable from the film and can be withdrawn from the interior of the inverted film by a flexible cord. The resin in the substrate sets upon inversion and maintains the inverted substrate in contact with the internal surface of the pipe.
REFERENCES:
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patent: 4456401 (1984-06-01), Williams
patent: 4714095 (1987-12-01), Muller et al.
patent: 4752511 (1988-06-01), Driver
patent: 4758454 (1988-07-01), Wood
patent: 4778553 (1988-10-01), Wood
patent: 4836715 (1989-06-01), Wood
patent: 5010440 (1991-04-01), Endo
patent: 5223204 (1993-06-01), Endoh
patent: 5225121 (1993-07-01), Yokoshima
patent: 5265648 (1993-11-01), Lyon
patent: 5280811 (1994-01-01), Catallo et al.
patent: 5334429 (1994-08-01), Imoto et al.
Muller Hans
Suerbaum Hermann
Hook James F.
Scherbel David A.
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