Optical cable installation with cable lubricator
US7021426B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2004 |
| Grant date | Apr 4, 2006 |
| Priority date | — |
| Expiry date | Nov 17, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02G1/086
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cable is installed in a protective duct or guide tube by means of blowing (and, optionally, synergetic pushing) and lubricating the cable during installation. Lubricating the cable is done after the cable exits from the cable blowing equipment and hence takes place in a pressurized airflow passage. A hollow chamber filled with foam-plugs saturated with lubricant forms the cable lubricator. Lubricant is wiped onto the cable as it moves through the pressurized lubrication compartment. A portion of the airflow used for propelling the cable during blowing installation is bypassed around the lubricator and injected into the duct trajectory downstream of the lubricator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.