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1. 发明申请

US20070216275A1 SPARK PLUG FOR USE IN AN INTERNAL-COMBUSTION ENGINE 有权
标题翻译：火花塞用于内燃机
公开(公告)号：US20070216275A1
公开(公告)日：2007-09-20
申请号：US11687828
申请日：2007-03-19
申请人： Kazuyoshi Torii , Kazumasa Yoshida , Wataru Matsutani
发明人： Kazuyoshi Torii , Kazumasa Yoshida , Wataru Matsutani
IPC分类号： H01T13/20
CPC分类号： H01T21/02 , H01T13/20 , H01T13/36 , H01T13/39
摘要： A spark plug 100 comprised of a metal shell 1, an insulator 2, a center electrode 3 and a ground electrode 4. A rear-end face of the ground electrode 4 is welded to a front-end face of the metal shell 1, and a bent portion 5 located at the intermediated position in the longitudinal direction is bent toward the center of the spark plug 100. The ground electrode 4 assumes a circular-shape with a diameter of 2 mm or less whereby an inflow of an air-fuel mixture is not disturbed even when the air-fuel mixture directly flows into a back face of the ground electrode 4. The ground electrode 4 is comprised of an outer layer 4A made of a nickel alloy and an inner layer 4B made of pure copper with an excellent thermal conductivity, in which a ratio of a cross-sectional area of the inner layer 4B to the entire cross-sectional area of the ground electrode 4 is 10% or more to 35% or less. Thus, the spark plug 100 which is excellent in heat sinking ability and can prevent a spring back phenomenon due to a difference in a coefficient of thermal expansion.
摘要翻译：由金属壳1，绝缘体2，中心电极3和接地电极4构成的火花塞100.接地电极4的后端面焊接在金属壳1的前端面上，位于中间位置的弯曲部分5朝向火花塞100的中心弯曲。接地电极4呈直径为2mm或更小的圆形，由此空气 - 燃料混合物即使当空气 - 燃料混合物直接流入接地电极4的背面时也不会受到干扰。接地电极4包括由镍合金制成的外层4A和由纯铜制成的内层4B，内层4B的截面积与接地电极4的整个横截面积的比率为10％以上35％以下的良好的导热性。因此，具有散热能力优异且能够防止由于热膨胀系数的差异引起的弹回现象的火花塞100。

2. 发明申请

US20070080618A1 Spark plug and method for producing spark plug 有权
标题翻译：火花塞和火花塞生产方法
公开(公告)号：US20070080618A1
公开(公告)日：2007-04-12
申请号：US11545490
申请日：2006-10-11
申请人： Kazuyoshi Torii , Kazumasa Yoshida , Wataru Matsutani
发明人： Kazuyoshi Torii , Kazumasa Yoshida , Wataru Matsutani
IPC分类号： H01T13/20
CPC分类号： H01T21/02 , H01T13/32
摘要： A spark plug comprising: a center electrode extending in a direction of an axis of said spark plug; a cylindrical insulator which has a shaft hole, and which holds said center electrode in said shaft hole in a state where a tip end of said center electrode is projected from a tip end face of said insulator; a metal shell which holds said insulator; and a ground electrode in which one end is joined to a tip end face of said metal shell, and which extends from said one end toward another end, wherein said ground electrode has an inner side face which faces said center electrode, and an outer side face which is a back face with respect to said inner side face, said outer side face is formed as an arcuately curved face when viewed from a side of said another end in an extending direction of said ground electrode, and a columnar noble metal tip is joined to said inner side face.
摘要翻译：一种火花塞，包括：沿所述火花塞的轴线方向延伸的中心电极; 圆柱形绝缘体，其具有轴孔，并且在所述中心电极的前端从所述绝缘体的前端面突出的状态下将所述中心电极保持在所述轴孔中; 保持所述绝缘体的金属外壳; 以及接地电极，其一端接合到所述金属壳的前端面，并且从所述一端向另一端延伸，其中所述接地电极具有面向所述中心电极的内侧面，外侧面是相对于所述内侧面的背面，当从所述另一端的侧面沿着所述接地电极的延伸方向观察时，所述外侧面形成为弧形弯曲面，柱状贵金属电极头为连接到所述内侧面。

3. 发明授权

US07839064B2 Spark plug for internal combustion engine 有权
标题翻译：内燃机火花塞
公开(公告)号：US07839064B2
公开(公告)日：2010-11-23
申请号：US11717638
申请日：2007-03-14
申请人： Kazumasa Yoshida , Kazuyoshi Torii , Wataru Matsutani
发明人： Kazumasa Yoshida , Kazuyoshi Torii , Wataru Matsutani
IPC分类号： H01T13/20
CPC分类号： H01T13/36 , H01T13/20 , H01T13/32 , H01T13/39
摘要： A spark plug including: a center electrode as defined herein; a substantially cylindrical insulator as defined herein; a cylindrical metal shell as defined herein; and a ground electrode as defined herein, wherein a spark discharge gap is provided between the leading end portion of the center electrode and the leading end portion of the ground electrode, and the ground electrode has a bulging curved face on a side opposite to a side in which the center electrode is provided, and a maximum of width of the ground electrode within a range of ±1 mm from a center point of the spark discharge gap in the axial direction, as viewed in a direction where the center electrode and the ground electrode overlap, is 105% or less of a width of an ordinary portion having a substantially constant width.
摘要翻译：一种火花塞，包括：如本文所定义的中心电极; 如本文所定义的基本上圆柱形的绝缘体; 如本文所定义的圆柱形金属壳; 以及如本文所定义的接地电极，其中在中心电极的前端部分和接地电极的前端部分之间设置火花放电间隙，并且接地电极在与侧面相反的一侧具有凸出的曲面其中设置中心电极，并且从中心电极和地面的方向观察，距离火花放电间隙的轴向中心点±1mm的范围内的接地电极的最大宽度电极重叠的宽度为宽度基本恒定的普通部分的宽度的105％以下。

4. 发明申请

US20070216277A1 Spark plug for internal combustion engine 有权
标题翻译：内燃机火花塞
公开(公告)号：US20070216277A1
公开(公告)日：2007-09-20
申请号：US11717638
申请日：2007-03-14
申请人： Kazumasa Yoshida , Kazuyoshi Torii , Wataru Matsutani
发明人： Kazumasa Yoshida , Kazuyoshi Torii , Wataru Matsutani
IPC分类号： H01T13/20
CPC分类号： H01T13/36 , H01T13/20 , H01T13/32 , H01T13/39
摘要： A spark plug including: a center electrode as defined herein; a substantially cylindrical insulator as defined herein; a cylindrical metal shell as defined herein; and a ground electrode as defined herein, wherein a spark discharge gap is provided between the leading end portion of the center electrode and the leading end portion of the ground electrode, and the ground electrode has a bulging curved face on a side opposite to a side in which the center electrode is provided, and a maximum of width of the ground electrode within a range of ±1 mm from a center point of the spark discharge gap in the axial direction, as viewed in a direction where the center electrode and the ground electrode overlap, is 105% or less of a width of an ordinary portion having a substantially constant width.
摘要翻译：一种火花塞，包括：如本文所定义的中心电极; 如本文所定义的基本上圆柱形的绝缘体; 如本文所定义的圆柱形金属壳; 以及如本文所定义的接地电极，其中在中心电极的前端部分和接地电极的前端部分之间设置火花放电间隙，并且接地电极在与侧面相反的一侧具有凸出的曲面其中设置中心电极，并且从中心电极和地面的方向观察，距离火花放电间隙的轴向中心点±1mm的范围内的接地电极的最大宽度电极重叠的宽度为宽度基本恒定的普通部分的宽度的105％以下。

5. 发明授权

US08072125B2 Spark plug for use in an internal-combustion engine with a bilayer ground electrode 有权
标题翻译：用于具有双层接地电极的内燃机的火花塞
公开(公告)号：US08072125B2
公开(公告)日：2011-12-06
申请号：US11687828
申请日：2007-03-19
申请人： Kazuyoshi Torii , Kazumasa Yoshida , Wataru Matsutani
发明人： Kazuyoshi Torii , Kazumasa Yoshida , Wataru Matsutani
IPC分类号： H01T13/32 , H01T13/39
CPC分类号： H01T21/02 , H01T13/20 , H01T13/36 , H01T13/39
摘要： A spark plug 100 comprised of a metal shell 1, an insulator 2, a center electrode 3 and a ground electrode 4. A rear-end face of the ground electrode 4 is welded to a front-end face of the metal shell 1, and a bent portion 5 located at the intermediated position in the longitudinal direction is bent toward the center of the spark plug 100. The ground electrode 4 assumes a circular-shape with a diameter of 2 mm or less whereby an inflow of an air-fuel mixture is not disturbed even when the air-fuel mixture directly flows into a back face of the ground electrode 4. The ground electrode 4 is comprised of an outer layer 4A made of a nickel alloy and an inner layer 4B made of pure copper with an excellent thermal conductivity, in which a ratio of a cross-sectional area of the inner layer 4B to the entire cross-sectional area of the ground electrode 4 is 10% or more to 35% or less. Thus, the spark plug 100 which is excellent in heat sinking ability and can prevent a spring back phenomenon due to a difference in a coefficient of thermal expansion.
摘要翻译：由金属壳1，绝缘体2，中心电极3和接地电极4构成的火花塞100.接地电极4的后端面焊接在金属壳1的前端面上，位于中间位置的弯曲部分5朝向火花塞100的中心弯曲。接地电极4呈直径为2mm或更小的圆形，由此空气 - 燃料混合物即使当空气 - 燃料混合物直接流入接地电极4的背面时也不会受到干扰。接地电极4包括由镍合金制成的外层4A和由纯铜制成的内层4B，其具有优异的内层4B的截面积与接地电极4的整个横截面积的比率为10％以上且35％以下的导热率。因此，具有散热能力优异且能够防止由于热膨胀系数的差异引起的弹回现象的火花塞100。

6. 发明授权

US07714489B2 Spark plug including ground electrode with arcuately curved face 有权
标题翻译：火花塞包括具有弧形曲面的接地电极
公开(公告)号：US07714489B2
公开(公告)日：2010-05-11
申请号：US11545490
申请日：2006-10-11
申请人： Kazuyoshi Torii , Kazumasa Yoshida , Wataru Matsutani
发明人： Kazuyoshi Torii , Kazumasa Yoshida , Wataru Matsutani
IPC分类号： F02M57/06 , H01T13/20
CPC分类号： H01T21/02 , H01T13/32
摘要： A spark plug comprising: a center electrode extending in a direction of an axis of said spark plug; a cylindrical insulator which has a shaft hole, and which holds said center electrode in said shaft hole in a state where a tip end of said center electrode is projected from a tip end face of said insulator; a metal shell which holds said insulator; and a ground electrode in which one end is joined to a tip end face of said metal shell, and which extends from said one end toward another end, wherein said ground electrode has an inner side face which faces said center electrode, and an outer side face which is a back face with respect to said inner side face, said outer side face is formed as an arcuately curved face when viewed from a side of said another end in an extending direction of said ground electrode, and a columnar noble metal tip is joined to said inner side face.
摘要翻译：一种火花塞，包括：沿所述火花塞的轴线方向延伸的中心电极; 圆柱形绝缘体，其具有轴孔，并且在所述中心电极的前端从所述绝缘体的前端面突出的状态下将所述中心电极保持在所述轴孔中; 保持所述绝缘体的金属外壳; 以及接地电极，其一端接合到所述金属壳的前端面，并且从所述一端向另一端延伸，其中所述接地电极具有面向所述中心电极的内侧面，外侧面是相对于所述内侧面的背面，当从所述另一端的侧面沿着所述接地电极的延伸方向观察时，所述外侧面形成为弧形弯曲面，柱状贵金属电极头为连接到所述内侧面。

7. 发明授权

US08120235B2 Spark plug for internal combustion engine and method for manufacturing spark plug 有权
标题翻译：用于内燃机的火花塞和用于制造火花塞的方法
公开(公告)号：US08120235B2
公开(公告)日：2012-02-21
申请号：US12741901
申请日：2008-11-20
申请人： Kenji Nunome , Hiroaki Kuki , Hiroyuki Kameda , Kazumasa Yoshida
发明人： Kenji Nunome , Hiroaki Kuki , Hiroyuki Kameda , Kazumasa Yoshida
IPC分类号： H01T13/00
CPC分类号： H01T13/39 , H01T21/02
摘要： A spark plug including a center electrode and a ground electrode. A center electrode noble metal tip is joined to a leading end portion of a center electrode, and a ground electrode noble metal tip is joined to a center-electrode-side side surface of the ground electrode. A distal end portion of the ground electrode noble metal tip protrudes from a distal-end surface of the ground electrode by 0.1 mm to 1.5 mm. A center-electrode-side side surface of the ground electrode noble metal tip projects from a center-electrode-side side surface by 0.15 mm to 0.6 mm. The ground electrode includes chamfered portions. Thickness lengths and widthwise lengths of the respective chamfered portions achieved within a cross section perpendicular to a center axis of the ground electrode are set to 0.2 mm or more.
摘要翻译：一种包括中心电极和接地电极的火花塞。中心电极用贵金属电极头接合于中心电极的前端部，接地电极用贵金属电极头接合于接地电极的中心电极侧面。接地电极用贵金属电极头的前端部从接地电极的前端面突出0.1mm〜1.5mm。接地电极用贵金属电极头的中心电极侧面从中心电极侧面突出0.15mm〜0.6mm。接地电极包括倒角部分。在与接地电极的中心轴垂直的截面内实现的各个倒角部的厚度长度和宽度方向的长度设定为0.2mm以上。

8. 发明授权

US5929556A Spark plug with center electrode having variable diameter portion retracted from front end on insulator 失效
标题翻译：具有可变直径部分的中心电极的火花塞从绝缘体上的前端缩回
公开(公告)号：US5929556A
公开(公告)日：1999-07-27
申请号：US746766
申请日：1996-11-15
申请人： Yoshihiro Matsubara , Akio Kokubu , Kazumasa Yoshida
发明人： Yoshihiro Matsubara , Akio Kokubu , Kazumasa Yoshida
IPC分类号： H01T13/14 , H01T13/20 , H01T13/52
CPC分类号： H01T13/14 , H01T13/52
摘要： In a spark plug in use for an internal combustion engine, a ground electrode is secured to a front end of the metal shell so that a front end surface of the ground electrode faces an elevational side of a front end of the center electrode to cause semi-creeping spark discharges therebetween along a front end surface of the insulator. A front end portion of the center electrode has an electrode base in the axial bore and an electrode front defined diametrically smaller than the electrode base by way of a diameter-variable portion. A diametrical difference between an initial point of the diameter-variable portion of the center electrode and the axial bore of the insulator is 1 mm or less, and the initial point of the diameter-variable portion is retracted by 0.0 mm-1.0 mm from the front end surface of the insulator.
摘要翻译：在用于内燃机的火花塞中，将接地电极固定在金属壳的前端，使得接地电极的前端面朝向中心电极的前端的前端，使半 - 沿着绝缘体的前端表面在其间放电。中心电极的前端部分在轴向孔中具有电极基座，电极前端通过直径可变部分沿直径小于电极基座。中心电极的直径可变部分的初始点与绝缘体的轴向孔之间的直径差为1mm以下，并且直径可变部的初始点从离开的距离缩短0.0mm-1.0mm 绝缘子的前端面。

9. 发明授权

US07892468B2 Polytetrafluoroethylene slit yarn and method for manufacturing same 有权
标题翻译：聚四氟乙烯狭缝纱及其制造方法
公开(公告)号：US07892468B2
公开(公告)日：2011-02-22
申请号：US12620681
申请日：2009-11-18
申请人： Kazumasa Yoshida
发明人： Kazumasa Yoshida
IPC分类号： B29C53/48
CPC分类号： D02G3/06 , B01D69/10 , D01D5/426 , D01F6/12 , D10B2321/042 , Y10T428/2419 , Y10T442/3033 , Y10T442/3041
摘要： A slit yarn wherein both side parts of the slit yarn are folded one or more times, and the folded width is substantially uniform along the direction of length of the yarn. In this slit yarn, when the width is measured at 20 or more points at intervals of 0.5 m, and the fluctuation coefficient X shown in the following Equation (1) is calculated on the basis of the average value W(avg) and the standard deviation W(σ), this X is (for example) approximately 4% or less. Furthermore, in the slit yarn of the present invention, the abovementioned folded parts are ordinarily shape-set. X(%)=W(σ)/W(avg)×100 (1)
摘要翻译：狭缝纱线，其中狭缝纱线的两个侧面部分被折叠一次或多次，并且折叠宽度沿着纱线的长度方向基本均匀。在该狭缝纱中，当以0.5μm的间隔在20个以上的点进行宽度测定时，根据平均值W（avg）和标准（avg）计算下述式（1）所示的变动系数X 偏差W（＆sgr;），该X为（例如）约4％以下。此外，在本发明的狭缝纱中，上述折叠部分通常成形。 X（％）= W（＆sgr）/ W（avg）×100（1）

10. 发明授权

US06244247B1 Ignition device for internal combustion engines 失效
标题翻译：内燃机点火装置
公开(公告)号：US06244247B1
公开(公告)日：2001-06-12
申请号：US09180928
申请日：1999-01-25
申请人： Yoshihiro Matsubara , Akio Kokubu , Kazumasa Yoshida , Tetsusi Suzuki
发明人： Yoshihiro Matsubara , Akio Kokubu , Kazumasa Yoshida , Tetsusi Suzuki
IPC分类号： F02D4304
CPC分类号： F02P15/08 , F02D41/064 , F02P5/1506 , H01T13/467 , H01T13/52 , Y02T10/46
摘要： In an internal combustion engine, an engine control device 40 judges based on a cooling water temperature of an engine in what state the engine is. When judged that the engine is in a cold state, the engine control device 40 produces an ignition signal to feed it to an igniter 6b so as to spark spark plugs 7 which are individually placed in cylinders at an exhaust stroke or expansion stroke.
摘要翻译：在内燃机中，发动机控制装置40基于发动机的状态来判断发动机的冷却水温度。当发动机处于冷态时，发动机控制装置40产生点火信号以将其送入点火器6b，以便在排气冲程或膨胀冲程中点燃单独放置在气缸中的火花塞7。

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