Spark plug and method of manufacturing the same
US8937427B2 · kind B2 · utility
1Cited by
15References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 12, 2014 |
| Grant date | Jan 20, 2015 |
| Priority date | — |
| Expiry date | Mar 12, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/39
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a spark plug that includes a metallic shell, an insulator, a center electrode, a ground electrode, and a firing pad. The method may include the steps of: applying a first laser beam to attach the firing pad to the ground electrode, and then using a second laser beam from the same laser beam welder to attach the ground electrode to the metallic shell. The laser beam welder may include a high energy density fiber laser for forming key-hole laser welds, as well as a programmable focusing optic (PFO) assembly for redirecting laser beams from one welding site to the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.