Spark plug with laser keyhole weld attaching ground electrode to shell
US9048635B2 · kind B2 · utility
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14References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2014 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Mar 11, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T21/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark plug has a metal shell, an insulator, a center electrode, and a ground electrode. One or more firing tips can be attached to the center electrode, to the ground electrode, or to both electrodes. The metal shell and ground electrode are attached together by way of one or more laser keyhole welds at an interface of the shell and electrode. Before the laser keyhole welds, resistance welding can be executed for a temporary attachment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.