Flexible tube for lining pipes and ducts as well as method and a

Details Flexible tube for lining pipes and ducts as well as method and a Flexible tube for lining pipes and ducts as well as method and a

1998-09-11

2000-10-10

Brinson, Patrick

Pipes and tubular conduits

Repairing

Patches

138 97, 264269, 156287, 4051501, F16L 5516

Patent

active

061291196

ABSTRACT:
A flexible tube for lining pipes and ducts as well as a method and an apparatus for manufacturing thereof are suggested. The flexible tube is composed of a coated fabric of high resilient warp threads as well as woof threads having lower elasticity. With the flexible tube thus suggested, strong curvatures or angles being present in the pipes can be lined without wrinkles and all-over for the first time.
This is enabled in that the high resilient warp threads are stabilized by covering yarn upon straight pipe portions and hence comprise a limited linear extension such that the flexible tube can be placed inside the pipe in quality.
In the curved pipe portions the high elasticity of the basic warp thread is activated by a force increase during passing through these portions by compensating the forces of the covering yarn, such that the flexible tube closely fits to the inner pipe wall, all-over and without any wrinkles in these regions.
The coating of the high resilient yarn is enabled by means of a new coating technique.

REFERENCES:
patent: 4576205 (1986-03-01), Morinaga et al.
patent: 4681783 (1987-07-01), Hyodo et al.
patent: 4877665 (1989-10-01), Higuchi et al.
patent: 5077107 (1991-12-01), Kaneda et al.
patent: 5535786 (1996-07-01), Makela et al.

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