Spark plug for motor vehicle internal combustion engine
US8040029B2 · kind B2 · utility
1Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2006 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Feb 17, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/52
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark plug for a motor vehicle internal combustion engine, substantially elongated in shape, and including: two coaxial electrodes of an inner central electrode and an outer base electrode enclosing the central electrode; and an electrically insulating annular block, interposed between the central electrode and the base electrode and including an annular shoulder. The insulating annual block includes an annular groove located at the shoulder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.