Glow plug with electric conductor connected to metal sleeve
US6689990B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2002 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Aug 1, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2203/027
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A glow plug comprises a ceramic heater having an insulating ceramic substrate, a heating resistor embedded in a front end portion of the ceramic substrate and a pair of first and second electric conductors embedded in the ceramic substrate and electrically connected at front end portions thereof to the heating resistor, a metallic sleeve circumferentially surrounding the ceramic heater with a front end portion of the ceramic heater protruded from the metallic sleeve, a metallic shell fitted onto the metallic sleeve, and a central electrode partly disposed in a rear portion of the metallic shell. The first and second electric conductors have rear end portions exposed at a rear end surface of the ceramic heater and electrically connected to the metallic shell and the central electrode via first and second connecting members, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.