Unitube optical fiber cable
US5029974A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1990 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Jan 22, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/44384
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The optical fiber cable has a plurality of centrally located optical fibers. Carrying the optical fibers is a gel-filled plastic buffer tube. A plurality of radial strength yarn threads extended along the outside of the buffer tube in a contra-helical pattern. In the armored cable embodiment, a strength and protective member in the form of a corrugated steel armor layer may be provided for additional protection against possible rodent damage. The armor is usually coated with a thin layer of plastic material in the form of a water blockable flooding compound. A ripcord is provided to assist in removal of the armor. A final polyethylene outer jacket is provided for additional cable protection. Embedded within the outer jacket is a pair of diametrically opposed, longitudinally extending strength members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.