Cycled fiber lock for cross-functional totally dry optical fiber loose tube cable
US6253012A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1999 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Feb 10, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/44384
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A cable includes an optical fiber, a buffer tube having the optical fiber arranged therein, and a thermoset material for connecting the optical fiber to the buffer tube. The thermoset material will not melt or appreciably soften and will maintain basic elastomeric flexibility in a temperature range of -40 to 70 degrees Celsius. The thermoset material may be a flame-retardant silicone elastomer, base and curing agent, as well as a liquid rubber molded compound, which is not flame-retardant. The thermoset material allows for fiber helix movement as the cable expands and contracts from -40 to +70 degrees Celsius, and is cyclically placed for connecting the optical fiber to the buffer tube at intervals of about every 1/2 meter, as well as at intervals of about every 10 meters. The cable is an indoor/outdoor flame retardant cable also having a fiberglass yarn matrix and a jacket, wherein either the buffer tube, the fiberglass yarn matrix, the jacket, or a combination thereof, is made from an optimal blend of polyvinylidene fluoride (PVDF) and flame retardant polyvinyl chloride (FRPVC). The indoor/outdoor flame retardant cable may have trace amounts of water swellable powder particles sp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.