Spark plug having an electrode structure that effectively suppresses flashover
US9660423B2 · kind B2 · utility
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6Claims
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Assignee
Inventor
Key dates
| Filing date | Jan 13, 2015 |
| Grant date | May 23, 2017 |
| Priority date | — |
| Expiry date | Jan 13, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
It is an object to reduce eccentricity between a terminal nut and an insulator. A spark plug includes an insulator, a terminal nut, and a metallic shell. The outside diameter of the insulator at a rear end of the metallic shell is smaller than or equal to 8 mm, and the contact area between a flat portion of the insulator and a contact surface of the terminal nut is smaller than 10 mm2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.