Spark ignition device and ground electrode therefor and methods of construction thereof
US8288930B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2010 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Oct 2, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53204
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark ignition device, ground electrode therefor, and methods of construction thereof are provided. The spark ignition device includes a generally annular ceramic insulator with a metal shell surrounding at least a portion of the ceramic insulator. A center electrode is received at least in part in the ceramic insulator and a ground electrode extends from the shell to a free end portion. A firing tip is attached adjacent the free end portion of the ground electrode to provide a spark gap between the center electrode and the firing tip. The free end portion is at least partially bounded by at least one “as laser cut” peripheral side extending adjacent the firing tip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.