Spark plug having stress corrosion cracking resistance
US8716924B2 · kind B2 · utility
1Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2011 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Apr 12, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark plug having a metallic shell covered with a nickel plating layer and having a groove portion formed between a tool engagement portion and a gas seal portion and having an orthogonal-to-axis sectional area of 36 mm2 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.