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1. 发明授权

US06771009B2 Spark plug 失效
标题翻译：火花塞
公开(公告)号：US06771009B2
公开(公告)日：2004-08-03
申请号：US09964892
申请日：2001-09-28
申请人： Kenichi Nishikawa , Yoshihide Kouge , Makoto Sugimoto
发明人： Kenichi Nishikawa , Yoshihide Kouge , Makoto Sugimoto
IPC分类号： H01T1300
CPC分类号： H01T13/38 , C03C8/04 , C03C8/10
摘要： A resistor-containing spark plug 100 has an alumina insulator 2 coated with a glaze layer 2d, the glaze layer 2d has a lead component content of 1 mol % or lower in terms of PbO and containing a silicon component, a boron component, a zinc and/or alkaline earth metal component, and an alkali metal component. The insulator has, in an axially central position thereof, a projection part protruding from the outer circumferential surface thereof and extending in a circumferential direction. That main body of the insulator which is located adjacent to the projection part on the rear side thereof, which is the side opposite to the front side facing the center electrode in the axial direction, has a base portion having a cylindrical outer circumference. The outer circumference of the base portion is covered with the glaze layer which, when examined by the method as provided for in JIS B 0601, gives a surface roughness curve having a maximum height Ry of 10 &mgr;m or smaller.
摘要翻译：含电阻的火花塞100具有涂覆有釉层2d的氧化铝绝缘体2，釉层2d的铅成分含量按PbO计为1摩尔％以下，含有硅成分，硼成分，锌和/或碱土金属组分和碱金属组分。绝缘体在其轴向中心位置处具有从其外周面突出并沿圆周方向延伸的突出部。位于其后侧的与前侧面相对的与轴向中心电极相反一侧的突出部相邻的绝缘体的主体具有圆筒状的外周的基部。基部的外周被覆有釉层，当通过JIS B 0601中规定的方法进行检查时，得到最大高度Ry为10μm以下的表面粗糙度曲线。

2. 发明授权

US06590317B2 Spark plug 有权
公开(公告)号：US06590317B2
公开(公告)日：2003-07-08
申请号：US09867759
申请日：2001-05-31
申请人： Kenichi Nishikawa , Yoshihide Kouge , Makoto Sugimoto
发明人： Kenichi Nishikawa , Yoshihide Kouge , Makoto Sugimoto
IPC分类号： H01T1300
CPC分类号： H01T13/38
摘要： A glaze layer 2d of the spark plug has the composition comprising 1 mol % or less of a Pb component in terms of PbO; 25 to 45 mol % of a Si component in terms of SiO2; 20 to 40 mol % of a B component in terms of B2O3; 5 to 25 mol % of a Zn component in terms of ZnO; 0.5 to 15 mol % of Ba and/or Sr components in terms of BaO or SrO; 5 to 10 mol % in total of at least one alkaline metal component of of Na, K and Li in terms of Na2O, K2O, and Li2, respectively, where K is essential; and further, 0.5 to 5 mol % in total of one or two kinds or more of Mo, W, Ni, Co, Fe and Mn in terms of MoO3, WO3, Ni3O4, Co3O4, Fe2O3, and MnO2, respectively.

3. 发明授权

US06744188B2 Spark plug 失效
标题翻译：火花塞
公开(公告)号：US06744188B2
公开(公告)日：2004-06-01
申请号：US09964859
申请日：2001-09-28
申请人： Kenichi Nishikawa , Yoshihide Kouge
发明人： Kenichi Nishikawa , Yoshihide Kouge
IPC分类号： H01T1320
CPC分类号： H01T13/38
摘要： A spark plug retains a resistor and has formed on alumina-based insulator a glaze layer, in which the glaze layer contains Pb component in a content of 1 mol % or less in terms of PbO, contains Si component, B component, Zn component, Al component, Ba component and/or Sr component, and contains F component in a content of 1 mol % or less. In addition, the glaze layer contains one kind or more of alkaline metal components, with Li component being necessary, and further contains one kind or more of phosphate ion, sulfate ion, fluoride ion and chloride ion in a content of 0.5 to 10 mol %. The glaze layer has a Vickers hardness Hv of 100 or more, shows excellent strength, especially impact resistance in spite of a reduced content of Pb component.
摘要翻译：火花塞保持电阻器，并且在氧化铝基绝缘体上形成釉层，其中釉层含有PbO含量为1摩尔％以下的Pb成分，含有Si成分，B成分，Zn成分， Al成分，Ba成分和/或Sr成分，含有1摩尔％以下的F成分。此外，釉层含有一种以上的碱金属成分，需要Li成分，并且还含有0.5〜10摩尔％的磷酸根离子，硫酸根离子，氟离子和氯离子中的一种以上，。釉层的维氏硬度Hv为100以上，显示出优异的强度，特别是耐冲击性，尽管Pb成分含量降低。

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