Process for laying a tube in a duct and device for pressurizing a tube during laying
US6382875B1 · kind B1 · utility
6Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Sep 29, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49826
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
When a tube is laid in a duct by a blowing process, the extremity of the tube first introduced in the duct is fitted with an end cap fastened in an airtight fashion on said extremity and fitted with a valve suitable to control the pressure Pint inside the tube, so that is always greater than the pressure Pext in the duct. In this matter, deformations or implosions of the tube are avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.