Spark plug with excellent impact resistance conductive seal,...

Details Spark plug with excellent impact resistance conductive seal,... Spark plug with excellent impact resistance conductive seal,...

2004-05-14

2009-12-01

Roy, Sikha (Department: 2879)

Electric lamp and discharge devices

Spark plugs

With specific joint structure

C313S118000, C313S137000

Reexamination Certificate

active

07626320

ABSTRACT:
An object of the present invention is to provide a spark plug which has more excellent impact resistance with electrical conductivity and airtightness kept excellent. In the invention, each of first and second electrically conductive sealing layers (17) and (19) is made of electrically conductive glass containing a glass component and a metal component. The metal component at least contains a Cu—Zn alloy which contains Cu as a first component, and Zn as a second component.

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patent: 11-339925 (1999-12-01), None
patent: 2003-0001351 (2003-01-01), None

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