Spark plug having ground electrode and intermediate electrode separated by insulating body
US6531809B1 · kind B1 · utility
11Cited by
7References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2000 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | Feb 11, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/462
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark plug is described that includes a housing, an insulator nose attached to the housing, a center electrode inserted through the insulator nose and projecting over the insulator nose tip, an intermediate electrode separated from the center electrode by a first spark gap, and a ground electrode attached to the housing. A solid-state insulating body, which forms a second spark gap in the form of a surface gap passing over the solid-state insulating body, is provided between the intermediate electrode and the ground electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.