Flexible flat cable
US4567321A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 1984 |
| Grant date | Jan 28, 1986 |
| Priority date | — |
| Expiry date | Sep 24, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B7/0838
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved, highly flexible flat multi-conductor electrical cable is provided, useful for example in robots wherein such cables may be flexed many times, comprising a plurality of conductor assemblies held in parallel relationship between layers of insulating coverings, the improvement comprising conductor assemblies having an elongate, non-conductive center core filament helically overwrapped along its longitudinal dimension by a first conductor in foil or tape form, such as copper foil, this first tape conductor having an outer covering of a conductive, low-friction material, the conductive covering being helically overwrapped along its longitudinal dimension by a second conductor in foil or tape form, such as copper foil, the second foil conductor being wrapped in a lay opposite to that of the first conductor, i.e. if one foil conductor is "S" wrapped, the other foil conductor is "Z" wrapped. A preferred core filament material is expanded, porous, sintered polytetrafluoroethylene, and a preferred conductive covering is conductive, unsintered polytetrafluoroethylene. Preferred insulating coverings are layers of polytetrafluoroethylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.