Spark plug with iridium-based alloy chip
US6528929B1 · kind B1 · utility
14Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1999 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Nov 10, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/39
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark plug includes a chip made of iridium. The distance E between the chip and a copper core of a core rod of the center electrode is not greater than 3.5 mm. The core rod has a diameter D1 of 1.4 mm to 2.6 mm. The ratio of a chip diameter D2 to the core rod diameter D1, or D2/D1, is not greater than 0.50.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.