Spark plug insulator for use in internal combustion engine
US5508582A · kind A · utility
62Cited by
2References
2Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 25, 1994 |
| Grant date | Apr 16, 1996 |
| Priority date | — |
| Expiry date | Apr 25, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a spark plug insulator for use in an internal combustion engine, a sintered body has boron nitride and a metal oxide, the boron nitride of the sintered body being 80% or greater by weight, and the sintered body having a thermal expansion coefficient of less than 5.0.times.10-.sup.6 /.degree.C. The metal oxide is selected alone or in combination from the group consisting of magnesium oxide, calcium oxide, silicon oxide, boron oxide, yttrium oxide and aluminum oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.