Spark plug with undercut insulator and one piece shell
US8643261B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 2011 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Feb 15, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T21/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark plug for an internal combustion engine, the spark plug having: an elongated center electrode having a center electrode tip at one end and a terminal proximate the other end; an insulator substantially surrounding the center electrode, the insulator having a channel formed in an exterior surface of the insulator; an outer shell surrounding the insulator having: a jamb nut portion with a distal end extending thereform, the distal end being aligned with the channel such that the distal end of the outer shell is received within and engages the channel; a motor seat portion proximate to the jamb nut portion; and a threaded portion proximate to the motor seat portion, wherein the jamb nut portion, the motor seat portion, and the threaded portion are all integrally formed with the outer shell as a single component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.