Construction for access to a buried pipeline
US4472911A · kind A · utility
45Cited by
6References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 9, 1982 |
| Grant date | Sep 25, 1984 |
| Priority date | — |
| Expiry date | Feb 9, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F5/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pipeline 1 crosses a manhole 2 with a degree of clearance and is provided, inside the manhole, with a vertical pipe 19 capped with a removable sealing cover 22. The movement of the pipeline in relation to its surroundings is thus enabled without it being necessary for the manhole to be sealed. The cover is provided with a drainage valve 32 operable from the top of the manhole by a chain 33.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.