Spark plug and method of manufacturing the same
US9197038B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2015 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Jun 1, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T21/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark plug including a ground electrode body and an electrode tip that is resistance welded to the ground electrode body and that has a discharge surface. In a specific sectional plane, a welding surface is located in the first direction from an outer surface of the ground electrode body. The welding surface includes a flat portion whose distance to the point P1 in the first direction is 0.05 mm or smaller, and when a point E1 and a point E2 are defined as ends of the flat portion and a second direction is defined as a direction from the point E2 toward the point E1, in the second direction from the point E1, a distance between the welding surface and the discharge surface in the first direction is smaller than a distance between the discharge surface and the point E1 in the first direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.