Electrical heating element
US7230211B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2005 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Sep 26, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2203/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric heating element is provided with a durable PTC resistance made at least partially of an iron-based alloy, exhibiting stable characteristics to a temperature of 1500 DEG C. and having a resistance/temperature characteristic curve which substantially increases in a linear manner within a temperature range between an ambient temperature and 1500 DEG C. and can be used for a temperature control. The PCT resistance is provided with an oxidation resistant metallization or is gas-tightly enveloped by a jacket (2, 3, 12), a space between the jacket (2, 3, 12) and the PCT resistance (1,13) being filled with a powder or granules (14) which remove an important gas amount from the space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.