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公开(公告)号：US4743793A
公开(公告)日：1988-05-10
申请号：US863506
申请日：1986-05-15
CPC分类号： C22C5/04 , B22F1/025 , B22F3/105 , B22F7/08 , B23K20/10 , C22C1/0466 , C22C5/02 , H01T21/02 , B22F2998/00 , F02B2075/027
摘要： At least one of center and ground electrodes of a spark plug has a thin layer formed by bonding noble metal powder on a discharge-related surface area of the electrode stock of said at least one of said center and ground electrodes in accordance with ultrasonic bonding. Instead of the thin layer, a discharge tip may be formed there by boring a hole in the electrode stock, filling noble metal powder, which has been obtained by coating spherical or flaky metal particles with a corresponding noble metal or noble metal alloy, in the hole and then bonding the thus-filled noble metal powder in accordance with ultrasonic bonding. As a further alternative, a tip made of a noble metal or an alloy thereof may be bonded by ultrasonic bonding or resistance welding in the hole with a layer or metal powder of a metal having good high-temperature erosion resistance or an alloy thereof interposed therebetween. The spark plug enjoys a long operating life.
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公开(公告)号：US4786267A
公开(公告)日：1988-11-22
申请号：US159607
申请日：1988-02-24
CPC分类号： C22C5/04 , B22F1/025 , B22F3/105 , B22F7/08 , B23K20/10 , C22C1/0466 , C22C5/02 , H01T21/02 , B22F2998/00 , F02B2075/027
摘要： At least one of center and ground electrodes of a spark plug has a thin layer formed by bonding noble metal powder on a discharge-related surface area of the electrode stock of said at least one of said center and ground electrodes in accordance with ultrasonic bonding. Instead of the thin layer, a discharge tip may be formed there by boring a hole in the electrode stock, filling noble metal powder, which has been obtained by coating spherical or flaky metal particles with a corresponding noble metal or noble metal alloy, in the hole and then bonding the thus-filled noble metal powder in accordance with ultrasonic bonding. As a further alternative, a tip made of a noble metal or an alloy thereof may be bonded by ultrasonic bonding or resistance welding in the hole with a layer of metal powder of a metal having good high-temperature erosion resistance or an alloy thereof interposed therebetween. The spark plug enjoys a long operating life.
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公开(公告)号：US4659960A
公开(公告)日：1987-04-21
申请号：US731942
申请日：1985-05-08
申请人： Akihiro Toya , Junichi Kagawa , Kazunori Yokota , Hiroaki Mori
发明人： Akihiro Toya , Junichi Kagawa , Kazunori Yokota , Hiroaki Mori
CPC分类号： H01T13/39
摘要： A spark plug having a center electrode comprises a ceramic insulator whose leg portion is shaped at the tip in a bag form so as to close the insulator bore. A firing tip is provided at the bag-shaped tip in a face-to-face relation with a side electrode by fixing an electrode element made of a sinter of a ceramic powder containing particles of a size between 10 and 200 .mu.m which are coated with a noble metal to a thickness of 0.1-20 .mu.m. An electrode axis extends from the top end of the plug and is inserted through the insulator bore.
摘要翻译： 具有中心电极的火花塞包括陶瓷绝缘体，该绝缘体的腿部以尖端形成袋形，以封闭绝缘体孔。 通过将包含尺寸在10-200μm之间的陶瓷粉末的烧结体的电极元件固定在涂覆有电极的位置处，在袋形尖端处与侧面电极以面对面的关系设置点火尖 贵金属的厚度为0.1-20μm。 电极轴线从插头的顶端延伸并插入穿过绝缘体孔。
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4.发明授权Electrode for a spark plug in which a firing tip is laser welded to a front end thereof 失效用于火花塞的电极，其中点火头被激光焊接到其前端
公开(公告)号：US5461276A
公开(公告)日：1995-10-24
申请号：US371577
申请日：1995-01-12
申请人： Wataru Matsutani , Junichi Kagawa
发明人： Wataru Matsutani , Junichi Kagawa
摘要： In an electrode for a spark plug, an elongated blank metal is made of a nickel-based alloy and including a front surface. A firing tip is provided from a slug made of a noble metal, the slug being concentrically placed on the front surface of the elongated blank metal and laser beam welded to thermally melt the entire slug and thereby produce a thermal weld, so that the front surface of the elongated blank metal is partly fused together with the slug to form a melted portion with the front surface and the slug so as to contain the front surface within the melted portion in the range of 0.5 wt % to 80.0 wt %.
摘要翻译： 在用于火花塞的电极中，细长的坯料由镍基合金制成并且包括前表面。 从由贵金属制成的芯块提供击发尖端，该芯块被同心地放置在细长的坯料金属的前表面上，焊接的激光束热熔融整个芯块，从而产生热焊接，从而使前表面 细长的空白金属部分地与块状地熔合在一起，以与前表面和块状物形成熔融部分，以便将熔融部分内的前表面包含在0.5重量％至80.0重量％的范围内。
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公开(公告)号：US5461210A
公开(公告)日：1995-10-24
申请号：US265003
申请日：1994-06-24
申请人： Wataru Matsutani , Junichi Kagawa
发明人： Wataru Matsutani , Junichi Kagawa
摘要： A method of manufacturing a spark plug electrode, wherein a composite column is provided to have a heat-conductor core embedded in a metallic clad by means of extrusion. A firing tip is provided from a slug which is made of a noble metal. The slug is concentrically placed on an end surface of the metallic clad, and a laser beam welding is applied on the slug to thermally melt the entire the slug so that the end surface of the metallic clad is partly fused into the slug in the range of 0.5 wt % to 80.0 wt %.
摘要翻译： 一种制造火花塞电极的方法，其中复合柱被设置成通过挤出将热导体芯嵌入金属包层中。 从由贵金属制成的块状物提供点火尖。 将芯块同心地放置在金属包层的端面上，并且将激光束焊接施加到芯块上以使整个芯块热熔融，使得金属覆层的端表面部分地熔合到芯块的范围内 0.5重量％〜80.0重量％。
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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
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。
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公开(公告)号：US5866973A
公开(公告)日：1999-02-02
申请号：US915063
申请日：1997-08-20
申请人： Junichi Kagawa , Wataru Matsutani
发明人： Junichi Kagawa , Wataru Matsutani
CPC分类号： H01T13/39
摘要： A spark plug is provided having a center electrode disposed in a metallic shell through an insulator so that the front end of the center electrode forms a spark gap with an outer electrode. A platinum tip is secured to the outer electrode positioned to oppose the front end of the center electrode. The outer electrode is provided with a heat-conductive core metal cladded with a matrix metal which is made of a nickel-based alloy containing 10-20 wt. % chromium. The platinum tip is welded to the outer electrode to form a welded portion between the platinum tip and the outer electrode and the platinum tip is positioned to terminate slightly short of the core metal so that the distance between a circumferential edge of the welded portion and a front end of the core metal is in the range 0.0 mm-2.0 mm measured lengthwise along direction the outer electrode.
摘要翻译： 提供火花塞，其具有通过绝缘体设置在金属壳体中的中心电极，使得中心电极的前端与外部电极形成火花隙。 铂尖被固定到与中心电极的前端相对定位的外电极。 外部电极设置有由基体金属包覆的导热芯金属，该基体金属由含有10-20重量％的镍基合金制成。 ％铬。 将铂尖焊接到外电极，以形成铂尖端和外电极之间的焊接部分，并且铂尖端被定位成稍微短于芯金属，使得焊接部分的周边边缘与 核心金属的前端在沿着外部电极的方向上沿长度方向测量的0.0mm-2.0mm的范围内。
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公开(公告)号：US5793793A
公开(公告)日：1998-08-11
申请号：US883145
申请日：1997-06-27
申请人： Wataru Matsutani , Junichi Kagawa
发明人： Wataru Matsutani , Junichi Kagawa
CPC分类号： H01T13/39
摘要： Spark plug has a central electrode, an insulator provided exterior to the central electrode, main metallic shell provided exterior to the insulator in such a way that the central electrode protrudes from one end, and a ground electrode coupled at one end to the main metallic shell and which has the other end disposed to face the central electrode 3, with a chip being secured to either the central electrode or the ground electrode or both to form spark discharge gap g. The chip is made of a metal based on Ir which contains Rh in an amount ranging from 3 to 50 wt % (50 wt % being not inclusive).
摘要翻译： 火花塞具有中心电极，设置在中心电极外部的绝缘体，主金属外壳设置在绝缘体的外部，使得中心电极从一端突出，并且接地电极在一端连接到主金属外壳 并且其另一端设置为面对中心电极3，其中芯片固定到中心电极或接地电极或两者以形成火花放电间隙g。 该芯片由含有3〜50重量％（不包括50重量％）量的Rh的基于Ir的金属制成。
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公开(公告)号：US4838218A
公开(公告)日：1989-06-13
申请号：US62138
申请日：1987-06-12
CPC分类号： F01L3/02 , F01L3/10 , F02F2001/008
摘要： A ceramic valve supporting structure for use in an internal combustion engine comprising: a ceramic valve having an integral stem, an upper portion of which is provided with a circular groove therearound; a frusto-conical shaped cotter comprising a pair of semi-cylindrical pieces, each inner surface of which has a lock projection located within said groove when secured to an outer surface of said stem; an annular retainer secured to an outer surface of said cotter to support said valve through said cotter, said retainer having an inner surface tapered to engage the outer surface of said cotter by wedging action due to a spring force acting upon to said retainer to bring said cotter into tight engagement with said stem; and an elastic layer provided between an inner surface of said cotter and the outer surface of said stem to absorb stress when said cotter engages said stem.
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公开(公告)号：US6064143A
公开(公告)日：2000-05-16
申请号：US749309
申请日：1996-11-14
申请人： Junichi Kagawa
发明人： Junichi Kagawa
摘要： In order to provide a multielectrode spark plug which is excellent in resistance to fouling and in which the voltage required for producing a spark can be lowered, the tip portion of at least one of plural ground electrodes is positioned by the side of an annular front end face of an insulator to form a semi-creeping spark discharging gap elongating along the surface of the insulator with the tip portion of a center electrode, and the tip portions of the ground other electrodes form aerial spark discharging gaps with the tip portion of the center electrode.
摘要翻译： 为了提供耐污垢性优异并且可以降低产生火花所需的电压的多电极火花塞，多个接地电极中的至少一个的前端部分位于环形前端侧 形成绝缘体的表面，以形成沿中心电极的前端部沿着绝缘体的表面延伸的半蠕变火花放电间隙，并且接地的其他电极的尖端部分与中心的尖端部分形成架空火花放电间隙 电极。
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