Optical fiber cable having truncated triangular profile tubes
US5649043A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1995 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | Jul 25, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4482
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical fiber cable includes a central strength member 11 surrounded by a plurality of optical fiber containing tubes 20, the central strength member and tubes being encircled by a sheath 35. The optical fiber containing tubes have a generally frustum or truncated isosceles triangular shaped profile with the base 22 of the triangular shape having a curvature corresponding to the inside surface of the cable sheath and a top 24 (truncated edge or corner) of the triangle opposite and generally parallel to the base having a curvature corresponding to the outside diameter of the central strength member, the plurality of tubes being positioned adjacent to one another in a pie shape to thereby form a central channel within the cable for the central strength member. The truncated isosceles triangular shape of the tubes have a larger cross-sectional area within the tubes for carrying optical fiber cables. Additionally, the shape of the tubes provides improved resistance to compression of the cable. Also, for a given number of optical fibers contained within the cable, the present invention provides an improved strain window as compared to prior art optical cables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.