Method and apparatus for providing the inner surface of a pipe line with a tubular lining material
US4427480A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 20, 1983 |
| Grant date | Jan 24, 1984 |
| Priority date | — |
| Expiry date | Jun 20, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1788
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for providing the inner surface of a pipe line with a tubular lining material through a binder under fluid pressure which comprises introducing the lining material in flattened state containing a binder in the interior space thereof into a pressure container, annularly fixing the front end of the tubular lining material to the container and applying fluid pressure to the pressure container to push the lining material forward within the pipe line while effecting evagination of the lining material and at the same time bonding the evaginated lining material onto the inner surface of the pipe line, characterized in that the introduction of the lining material into the pressure container is performed by squeezing the flattened tubular lining material at definite intervals linearly in the transverse direction to the advancing tubular lining material under atmospheric pressure to isolate the portion of the lining material together with the binder contained therein between the adjacent two linearly squeezed positions, allowing the lining material to advance into the pressure container while keeping the lining material squeezed linearly in the transverse direction at …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.