Sewer renovation system
US4678370A · kind A · utility
39Cited by
8References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Oct 16, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F2003/065
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for lining a sewer pipe incorporate the steps of continuously forming a liner of helically wound strip, the strip having complementary engaging side formations, and feeding the liner into the sewer pipe. The ends of the liner are sealed to the sewer pipe and cementitious grout is pumped under pressure into the space between the liner and the sewer pipe to bond the liner is position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.