Methods of laying underground conduits
US4329083A · kind A · utility
45Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1979 |
| Grant date | May 11, 1982 |
| Priority date | — |
| Expiry date | Nov 5, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L1/028
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a method of laying underground conduits along a trench dug into the ground and filled with sludge designed to prevent the trench walls from collapsing. The trench is at least partly lined with hardenable grout and the conduit laying operations are carried out under the protection of this grout so that, after the same has hardened, it seals the conduit into the ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.