Spark plug for internal combustion engine
US9972977B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2015 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Apr 15, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark plug 5 for an internal combustion engine includes a center electrode 1, an insulator 2, and a housing 3. The insulator 2 includes a distal end side exposed part and an insulator enlarged diameter part 21. The housing 3 includes a lateral electrode 32, an engaging part 33, and a crimping portion 35. A buffer member 4 that restrains the distal end side exposed part 20 by pressing a part of the distal end side exposed part 20 toward the center and a part of the inner peripheral surface of the lateral electrode 32 in a radial direction at a distal end side of the engaging part 33 is disposed at a base end side of the gas pocket 230.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.