External protection for direct electric heating cable
US8759724B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2010 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Nov 30, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49194
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention concerns an elongated object (1) including a cable (2) being surrounded by an external protection (3a, 3b, 3c, 3d, 3e), said external protection comprising at least one protection layer including at least two elongated extruded hollow profiles (31a, 31b, 31c, 31d, 31e), each elongated extruded hollow profile comprising at least one elongated empty cavity (32), characterized in that each profile (31a, 31b, 31c, 31d, 31e) of said external protection is a single element along the whole length of the cable portion to be protected, and that the total cross section area of the empty parts of the external protection represents at least 20% of the total cross section area of the external protection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.