Drain sealing
US7134808B2 · kind B2 · utility
14Cited by
15References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2004 |
| Grant date | Nov 14, 2006 |
| Priority date | — |
| Expiry date | Oct 8, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F3/046
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Plastic liner sections define a drainage channel when placed end to end. Each end has a stiff, double walled flange at each side of the end adapted to butt up to a similar flange at the adjacent end of the next sections. The double walled construction of the flanges stiffens the ends significantly reducing the risk of deformation by the hydrostatic forces produced by wet concrete during installation. A groove is formed inwardly of the flanges on a female end of the liner section and receives a sealing ring, which is held in place by a lip formed on a male end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.