发明名称 |
Spark plug with an improved seal |
摘要 |
A spark plug having a glass seal formed from a first glass material and a second glass material. The first glass material has a glass transition temperature/softening point that is greater than the glass transition temperature/softening point of the second glass material. The first glass material and second glass material form a matrix and when combined with a filler have thermal expansion rates and properties the approximate leaded glass.
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申请公布号 |
US7969077(B2) |
申请公布日期 |
2011.06.28 |
申请号 |
US20070763786 |
申请日期 |
2007.06.15 |
申请人 |
FEDERAL-MOGUL WORLD WIDE, INC. |
发明人 |
HOFFMAN JOHN W. |
分类号 |
H01T13/38 |
主分类号 |
H01T13/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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