Lining of pipelines and passageways
US4401696A · kind A · utility
36Cited by
0References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1981 |
| Grant date | Aug 30, 1983 |
| Priority date | — |
| Expiry date | Sep 30, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/1651
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of lining a passageway, such as an undergound sewer is disclosed. A fluent but thixotropic cementitious composition is sprayed onto the surface of the passageway, to form a lining of predetermined thickness and before the material has had time to flow to change its distribution on the surface, a flexible tube is everted onto the applied material, holding it in position until it is sufficiently cured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.