Method and means of lining a manhole
US8500429B2 · kind B2 · utility
7Cited by
15References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2010 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Nov 10, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D2450/106
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus and method is provided for lining the wall of a manhole. The apparatus may include a liner assembly, which includes an expansion device, an auxiliary bladder, a primary bladder, and a liner. The auxiliary bladder is first inflated near the top of the manhole. Next the primary bladder may be expanded to press the liner against the wall of the manhole. The liner, being impregnated with a resinous material, is pressed against the wall until the resinous material cures and hardens. The expansion device, auxiliary bladder, and primary bladder are then removed from the manhole. The result is a repaired manhole wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.