Method of constructing information correspondence pipe, constructed structure, and construction member
US7341403B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 22, 2002 |
| Grant date | Mar 11, 2008 |
| Priority date | — |
| Expiry date | Nov 22, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4459
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The object is to provide a construction method of an information-communicable underground pipe whereby communication cables can be readily laid in an underground pipeline having a main pipe and branch pipes branched therefrom thereby allowing the underground pipeline to be used as an information-communicable underground pipe, and to provide a construction structure and a construction member therefor. The construction method of an information-communicable underground pipe comprises inserting a sheath pipe (1) into an underground pipeline (17, 7) through a manhole (9, 10), the sheath pipe having a main body (3) formed with an empty room (2) for installing a communication cable (6) thereinto and a high-strength low-elongation material element (4) integrally formed in the main body (3) along the length of the main body (3), and securing the high-strength low-elongation material element (4) onto the inner wall of said manhole (9, 10) by applying tension thereon to secure the sheath pipe (1) in the substantially upper part inside the underground pipeline (17, 7).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.