Sheathed optical fibres and method of installing such fibres
US5121901A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1988 |
| Grant date | Jun 16, 1992 |
| Priority date | — |
| Expiry date | Apr 22, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/52
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A sheath for optical fibres comprises a compound sheath having an inner sheath of high modulus and density, and an outer sheath layer of low density material. The outer sheath layer may be of foamed polyethylene and the inner sheath of polypropylene, both conveniently formed by extrusion. Such fibre members are installed by first installing a conduit having one or more bores and subsequently inserting the flexible, lightweight optical fibre members containing the optical fibres into the bores. The optical fibre members are propelled by employing the fluid drag of air, or another suitable gas, passed at high velocity through the bores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.