Lining of passageways
US5409561A · kind A · utility
29Cited by
7References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1993 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Jul 6, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L58/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An underground pipeline or passageway is lined by having a plastics film pre-liner tube applied thereto by inflation, and the tube whilst inflated has an applicator pulled therethrough from which a fluent curable or hardenable composition issues and is applied directly to the inside of the inflated tube to form a layer which cures or hardens to form a lining. Preferably a second tube is applied to the inside of the composition layer to hold it in position whilst it cures or hardens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.