Helically-wound electric cable
US7928320B2 · kind B2 · utility
1Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 2009 |
| Grant date | Apr 19, 2011 |
| Priority date | — |
| Expiry date | Oct 23, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B13/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A helically-wound electric cable having at least two groups wound together so as to form a group helix. Each group has at least two twisted-together conductor wires, wherein the pitch of the group helix varying along the helically-wound electric cable in accordance with a sinusoidal function between two limit values having the same sign, characterized in that said sinusoidal function has a determined modulation period (MP) in order to avoid return loss peak (RLp) in the operating frequency range (Fmin-Fmax) of said helically-wound electric cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.