Spark plug electrode and spark plug manufacturing method
US9004969B2 · kind B2 · utility
1Cited by
52References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2012 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Jul 12, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T21/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of making a spark plug electrode includes several steps. One step includes providing an inner core of a ruthenium (Ru) based alloy or an iridium (Ir) based alloy. Another step includes providing an outer skin over a portion or more of the inner core in order to produce a core and skin assembly. The outer skin can be made of platinum (Pt), gold (Au), silver (Ag), nickel (Ni), or an alloy of one of these. Yet another step includes increasing the temperature of the core and skin assembly. And another step includes hot forming the core and skin assembly at the increased temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.