Parallel-type heating cable and method of making same
US4345368A · kind A · utility
7Cited by
20References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1980 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | Sep 18, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49083
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for parallel-type heating cables. In accordance with the present invention a heating core element is formed by connecting two essentially parallel bus wires with a plurality of electrically conductive splices to a centrally disposed resistive element and around which heating core element a protective sheath is formed. The present invention permits this heating core element to be formed by splicing the spaced apart, essentially parallel wire elements followed by a single extrusion application of a protective sheath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.