Contact piece made of tungsten provided with a corrosion-resistant layer made of a base metal
US7339127B2 · kind B2 · utility
5Cited by
10References
12Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 19, 2004 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | May 5, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49105
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A contact piece is formed by a tungsten overlay soldered onto a support, wherein at least portions of the solder layer and optionally of the support are covered by a layer of a less noble metal than tungsten. The corrosion resistance of the tungsten overlay is considerably improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.