Ceramic heater and glow plug having the ceramic heater
US6737612B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2002 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Aug 3, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2203/027
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ceramic heater includes a rod-shaped heater body provided with 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 with front end portions thereof electrically connected to the heating resistor and rear end portions thereof exposed at a rear end surface of the heater body. The ceramic heater further includes first and second lead-out members having front surfaces joined to parts of the rear end surface of the heater body via metallic layers so as to cover the exposed rear end portions of the first and second electric conductors, respectively, and to be kept from covering an outer circumferential surface of the heater body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.