Methods and apparatus for relining service pipe
US4321740A · kind A · utility
13Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 1980 |
| Grant date | Mar 30, 1982 |
| Priority date | — |
| Expiry date | May 13, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4994
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus are provided for relining a fluid transmission pipe in which a deformable stiffener is inserted in one end of a plastic liner, the plastic liner is inserted into the transmission line with the stiffener first, a plastic sealant is placed around the end of the plastic liner in the transmission pipe and the stiffener is expanded intermediate its ends in the plastic liner to force the liner end into tight contact with the transmission pipe interior with sealant surrounding the contact area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.