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1. 发明授权

US4808135A Center electrode structure for spark plug 失效
标题翻译：火花塞中心电极结构
公开(公告)号：US4808135A
公开(公告)日：1989-02-28
申请号：US107940
申请日：1987-10-13
申请人： Akio Sakura , Mitsutaka Yoshida , Junichi Kagawa
发明人： Akio Sakura , Mitsutaka Yoshida , Junichi Kagawa
IPC分类号： H01T13/16 , H01T13/39
CPC分类号： H01T13/39 , H01T13/16
摘要： In a center electrode structure for spark plug including a tublar insulator, the inner side of which has a stepped shoulder to provide a diameter-reduced bore therein; a center electrode having a flange, and concentrically placed into the insulator with the flange engaging against the shoulder, and with one end being axially through the bore so as to be exposed to outside of the insulator; the center electrode having an electrically conductive core of copper or copper-based alloy which is encased into an enclosure made of oxidation and heat resistant nickel-based alloy; and the core being provided with a number of fractures in its granular structure so as to absorb thermal stress due to the thermal expansional difference between the core and enclosure.
摘要翻译：在一种用于火花塞的中心电极结构中，该火花塞包括一个绝缘子，其内侧具有阶梯状的肩部以在其中提供直径减小的孔; 具有凸缘的中心电极，并且同心地放置在所述绝缘体中，所述凸缘与所述肩部接合，并且一端轴向地穿过所述孔，以暴露于所述绝缘体的外部; 所述中心电极具有铜或铜基合金的导电芯，所述导体芯被封装在由氧化和耐热的镍基合金制成的外壳中; 并且芯在其颗粒结构中被提供多个裂缝，以便由于芯和外壳之间的热膨胀差而吸收热应力。

2. 发明授权

US4814665A Center electrode structure for spark plug 失效
标题翻译：火花塞中心电极结构
公开(公告)号：US4814665A
公开(公告)日：1989-03-21
申请号：US096042
申请日：1987-09-11
申请人： Akio Sakura , Mitsutaka Yoshida , Junichi Kagawa
发明人： Akio Sakura , Mitsutaka Yoshida , Junichi Kagawa
IPC分类号： H01T13/39 , H01T13/20
CPC分类号： H01T13/39
摘要： In a center electrode structure for spark plug including a tubular insulator, the inner side of which has a stepped shoulder to provide a diameter-reduced bore therein; a center electrode having a flange, and concentrically placed into the insulator with the flange engaging against the shoulder, and with one end being axially through the bore so as to be exposed to outside of the insulator; the center electrode having a highly heat conductive core of copper or copper-based alloy which is encased into an enclosure made of oxidation and heat resistant nickel-based alloy; and the core providing its overall outer surface with a thin oxidation layer, so that the core is clad with the enclosure through the oxidation layer by means of extrusion.
摘要翻译：在包括管状绝缘体的火花塞的中心电极结构中，其内侧具有阶梯状肩部以在其中提供直径减小的孔; 具有凸缘的中心电极，并且同心地放置在所述绝缘体中，所述凸缘与所述肩部接合，并且一端轴向地穿过所述孔，以暴露于所述绝缘体的外部; 中心电极具有铜或铜基合金的高导热性芯，该铜或铜基合金被封装在由氧化和耐热的镍基合金制成的外壳中; 并且芯为其整个外表面提供薄的氧化层，使得芯通过挤压通过氧化层与外壳包层。

3. 发明授权

US5877584A Spark plug for an internal combustion engine 失效
标题翻译：用于内燃机的火花塞
公开(公告)号：US5877584A
公开(公告)日：1999-03-02
申请号：US847356
申请日：1997-04-24
申请人： Tomoaki Kato , Akio Sakura , Takahiro Suzuki
发明人： Tomoaki Kato , Akio Sakura , Takahiro Suzuki
IPC分类号： H01T13/14 , H01T13/20
CPC分类号： H01T13/14 , H01T13/20
摘要： In a spark plug, a cylindrical metal shell is provided whose inner wall has a ledge portion on which an insulator rests through its seat portion. The insulator has an axial bore in which a center electrode is placed whose front end has a heat-resistant metal tip. A ground electrode is provided to form a spark gap with the noble metal tip of the center electrode. The insulator forms an insulator nose which measures less than 15 mm in length. The heat-resistant metal tip measures less than 0.8 mm in diameter. A space between an outer surface of the center electrode and an inner wall of a front open end of the axial bore is defined to be more than 0.1 mm in width.
摘要翻译：在火花塞中，提供圆柱形金属外壳，其内壁具有凸缘部分，绝缘子通过其突出部分靠在其座部上。绝缘体具有轴向孔，中心电极放置在其中，前端具有耐热金属尖端。提供接地电极以与中心电极的贵金属端头形成火花隙。绝缘体形成长度小于15毫米的绝缘子鼻子。耐热金属尖端的直径小于0.8毫米。中心电极的外表面和轴向孔的前开口端的内壁之间的空间被限定为大于0.1mm的宽度。

4. 发明授权

US06997767B2 Method for manufacturing a spark plug, and spark plug 有权
标题翻译：火花塞和火花塞的制造方法
公开(公告)号：US06997767B2
公开(公告)日：2006-02-14
申请号：US10400390
申请日：2003-03-28
申请人： Yutaka Taniguchi , Masahide Sumi , Akio Sakura
发明人： Yutaka Taniguchi , Masahide Sumi , Akio Sakura
IPC分类号： H01T21/02 , B23K26/00
CPC分类号： H01T21/02 , H01T13/39
摘要： A method for manufacturing a spark plug which reduces the generation of spatters and the possibility of insufficient weld strength resulting from penetration depth insufficiency of a weld metal portion is disclosed. In accordance with the method, a chip joint face formation portion of a center electrode is formed from a heat-resistant alloy predominantly containing Fe or Ni. A noble metal chip is attached to a chip joint face of the chip joint face formation portion to thereby form a chip-attached assembly. A full-circled laser-beam weld metal portion is formed on the chip-attached assembly in such a manner as to intrude into the noble metal chip and into the chip joint face formation portion. A graded-index-type fiber optic cable is used as an optical transmission path extending between a laser beam generator and an optical emission section. A laser beam which is transmitted from the laser beam generator through the cable irradiates the chip-attached assembly while being condensed.
摘要翻译：公开了一种用于制造火花塞的方法，该火花塞减少了飞溅物的产生以及由焊接金属部分的穿透深度不足引起的焊接强度不足的可能性。根据该方法，由主要含有Fe或Ni的耐热合金形成中心电极的芯片接合面形成部。贵金属芯片附接到芯片接合面形成部分的芯片接合面，从而形成芯片附接组件。在芯片安装组件上形成全圈激光束焊接金属部分，以便侵入贵金属芯片并进入芯片接合面形成部分。使用渐变折射率型光缆作为在激光束发生器和光发射部之间延伸的光传输路径。从激光束发生器通过电缆传输的激光束在被冷凝时照射芯片附接组件。

5. 发明授权

US06750597B1 Method for manufacturing spark plug and spark plug 有权
标题翻译：火花塞和火花塞的制造方法
公开(公告)号：US06750597B1
公开(公告)日：2004-06-15
申请号：US09640155
申请日：2000-08-16
申请人： Akio Sakura
发明人： Akio Sakura
IPC分类号： H01T1320
CPC分类号： H01T13/32 , H01T13/20 , H01T21/02
摘要： A method for manufacturing a spark plug having a center electrode, an insulator disposed around the center electrode, a metallic shell disposed around the insulator, a ground electrode disposed in opposition to the center electrode so as to form a spark discharge gap therebetween, and a chip of a high melting point metal welded to at least the ground electrode. A zinc-based plating layer is formed on the surface of a metallic shell assembly composed of the metallic shell and the ground electrode, a root-end of which is welded to the metallic shell. Subsequently, the zinc-based plating layer is removed from a free-end portion of the ground electrode. The chip of a high melting point metal is welded to the free-end portion of the ground electrode from which the zinc-based plating layer has been removed.
摘要翻译：一种用于制造具有中心电极的火花塞的方法，设置在中心电极周围的绝缘体，设置在绝缘体周围的金属壳，与中心电极相对设置的接地电极，以在它们之间形成火花放电间隙，至少焊接在接地电极上的高熔点金属芯片。在由金属壳体和接地电极构成的金属壳体组件的表面上形成锌基镀层，其底端焊接到金属壳体上。随后，从接地电极的自由端部分去除锌基电镀层。将高熔点金属的芯片焊接到已经去除了锌基镀层的接地电极的自由端部分。

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