Lining of passageways
US4064211A · kind A · utility
172Cited by
9References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1975 |
| Grant date | Dec 20, 1977 |
| Priority date | — |
| Expiry date | Nov 5, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/1651
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method wherein a tubular liner is applied to the surface of a passageway such as a tunnel or pipeline bore. The liner may be in the form of a flattened tube of absorbent material such as felt or foam such is impregnated with synthetic resin. The liner is anchored at one end of the passageway and is fed into the passageway being turned inside out as it is so fed in. In order to eliminate friction, the liner, before being turned inside out, is supported buoyantly by liquid which serves to carry the liner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.