Flame resistant optical fiber cable with optical fibers loosely enclosed in tubes
US5390273A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1993 |
| Grant date | Feb 14, 1995 |
| Priority date | — |
| Expiry date | Jul 16, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/44384
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical fiber cable which is flame resistant and suitable for both indoor and outdoor use, which includes a central strength member, a fluid impervious tube wound around the strength member, a plurality of optical fibers loosely received in the tube, a sheath of plastic material encircling the tube and the central member, a thermal barrier layer intermediate the tube and the sheath and encircling the tube and the central member to protect the elements inwardly of the heat barrier from heat and flame external to the barrier layer and a water blocking material in any otherwise empty spaces within the tube and between the barrier layer and the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.