Spark plug electrode and method of making
US8460044B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2010 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Feb 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T21/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a center electrode for a spark plug, the method including the steps of: resistance welding a sphere of a noble metal to a center electrode of a spark plug to provide a center electrode with an electrode tip that has a tip portion of a first configuration, the first configuration having a first height and a first width; and shaping the tip portion after the sphere is welded to the center electrode by a process wherein the tip portion will have a second configuration having a second height and a second width, the second height being greater than the first height and the second width being less than the first width wherein a peripheral edge of the noble metal is flush with a peripheral edge of the material it is secured to.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.