Spark plug
US6819030B2 · kind B2 · utility
8Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2003 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Apr 4, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark plug includes a shell on which a threaded shank having a thread and a tool attachment for installation in an internal combustion engine are situated, and an assembly shank of the shell running between the threaded shank and the tool attachment. The spark plug is dimensioned in such a way that the ratio of the sum of the threaded shank length and the assembly shank length to the sum of the assembly shank diameter and the thread diameter is between 0.95 and 1.55.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.