Spark plug and ignition device of internal combustion engine
US11011891B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2019 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Jun 5, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark plug has a housing of a cylindrical shape, an insulator of a cylindrical shape fitted into the inside of the housing, a center electrode and a ground electrode. No male screw part is formed on an outer peripheral surface of the housing. A housing support surface is formed on an inner peripheral surface of the housing. An outer peripheral surface of the insulator has an insulator support surface which is supported by the housing support surface in an axial direction of the spark plug. The housing has a pressure fitting part to be presses to a cylinder head of an internal combustion engine. A part of the pressure fitting part and a part of at least one of the housing support surface and the insulator support surface are arranged to be overlapped with each other in a radial direction of the spark plug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.