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公开(公告)号：US20190067914A1
公开(公告)日：2019-02-28
申请号：US16106103
申请日：2018-08-21
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kazuhiro KUROSAWA , Katsuya TAKAOKA , Kota YOKOYAMA , Kuniharu TANAKA , Hirokazu KURONO , Hironori UEGAKI
IPC: H01T13/05
Abstract: A spark plug having a connection portion disposed between a metal terminal and a center electrode. The connection portion includes: a magnetic substance formed from a Fe-containing oxide; a conductor which is a wire helically disposed on an outer periphery of the magnetic substance and electrically connected to the metal terminal and the center electrode; and an intermediate member which is in contact with the magnetic substance, the conductor, and an inner peripheral surface of the insulator, is disposed between the magnetic substance and the conductor, and the inner peripheral surface of the insulator, and has lower electrical conductivity than the conductor. The conductor is made of one or more of an oxide conductor, carbon, and a carbon compound.
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公开(公告)号：US20160322789A1
公开(公告)日：2016-11-03
申请号：US15108075
申请日：2014-12-25
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Katsuya TAKAOKA , Kazuhiro KUROSAWA , Kuniharu TANAKA , Toshitaka HONDA , Hirokazu KURONO , Haruki YOSHIDA , Hironori UEGAKI
Abstract: A connection portion connecting a center electrode and a terminal metal fixture together in a through hole of the insulator includes a resistor and a magnetic substance structure including a magnetic substance and a conductor The connection portion further includes a first conductive sealing portion, a second conductive sealing portion and a third conductive sealing portion. The first conductive sealing portion is disposed on a leading end side of a first member and is in contact therewith. The second conductive sealing portion is disposed between the first member and a second member and is in contact with the first member and the second member. The third conductive sealing portion is disposed on a rear end side of the second member and is in contact therewith.
Abstract translation: 在绝缘子的通孔中连接中心电极和端子金属固定器的连接部分包括电阻器和包括磁性物质和导体的磁性物质结构。连接部分还包括第一导电密封部分，第二导电密封部分 部分和第三导电密封部分。 第一导电密封部分设置在第一构件的前端侧并与其接触。 第二导电密封部分设置在第一构件和第二构件之间并与第一构件和第二构件接触。 第三导电密封部分设置在第二构件的后端侧并与其接触。
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公开(公告)号：US20190067915A1
公开(公告)日：2019-02-28
申请号：US16106187
申请日：2018-08-21
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kazuhiro KUROSAWA , Katsuya TAKAOKA , Kota YOKOYAMA , Kuniharu TANAKA , Hirokazu KURONO , Hironori UEGAKI
Abstract: A spark plug having a connection portion disposed in the axial hole and between a metal terminal and a center electrode. The connection portion includes: a magnetic substance formed from a Fe-containing oxide; a conductor helically disposed on an outer periphery of the magnetic substance and electrically connected to the metal terminal and the center electrode; and an intermediate member disposed between the magnetic substance and the conductor, and an inner peripheral surface of the insulator and having lower electrical conductivity than the conductor. The conductor includes a base and a conductive layer disposed on an outer periphery of the base and having higher electrical conductivity than the base, and the conductive layer has a thickness of larger than 0.1 μm and equal to or smaller than 25 μm.
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公开(公告)号：US20180166861A1
公开(公告)日：2018-06-14
申请号：US15580903
申请日：2016-05-25
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kazuhiro KUROSAWA , Katsuya TAKAOKA , Kuniharu TANAKA , Toshitaka HONDA , Hirokazu KURONO , Hironori UEGAKI
CPC classification number: H01T13/05 , C01G49/0063 , C01G49/02 , C01G51/04 , C01G53/006 , C01G53/04 , C01P2004/61 , C01P2004/62 , C01P2006/42 , H01T13/20 , H01T13/41
Abstract: A connection structure between a center electrode and a metal terminal of a spark plug having a composite part that contains a plurality of secondary particles each formed of a plurality of primary particles of iron-containing oxide as a magnetic substance, and a conductive material coating the plurality of secondary particles. The iron-containing oxide includes at least one of an oxide represented by M1+AOFe2−AO3 (where −0.5≤A≤0.5; and M is at least one kind of element selected from the group consisting of Mn, Fe, Co, Ni, Cu, Mg, Zn and Ca) and an oxide represented by Q3Fe5O12 (where Q is at least one kind of element selected from the group consisting of Y, Lu, Yb, Tm, Er, Ho, Dy, Tb, Gd and Sm). In cross section, an average particle size of the primary particles is 0.5 μm to 100 μm, an average particle size of the secondary particles is 0.5 mm to 2.0 mm, and a porosity of the inside of the secondary particles is 5% or lower.
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公开(公告)号：US20140336035A1
公开(公告)日：2014-11-13
申请号：US14273026
申请日：2014-05-08
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Katsuya TAKAOKA , Yutaka YOKOYAMA , Kengo FUJIMURA , Hironori UEGAKI , Hiroki TAKEUCHI , Hirokazu KURONO , Toshitaka HONDA , Kuniharu TANAKA , Takeshi MITSUOKA
IPC: H01T13/38 , C04B35/50 , C04B35/505
CPC classification number: H01T13/38 , C04B35/111 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3232 , C04B2235/3241 , C04B2235/3244 , C04B2235/3251 , C04B2235/3262 , C04B2235/3272 , C04B2235/3418 , C04B2235/786 , C04B2235/85
Abstract: An insulator for spark plug with a main constituent of alumina and containing silicon includes a grain boundary phase positioned between alumina particles. The grain boundary phase contains: a group 2A element; a rare earth element; and at least one kind of zirconium, titanium, chrome, niobium, manganese, and iron (a first element). Assuming that a total amount of the rare earth element is X (mass %), a total amount of the group 2A element is Y (mass %), and a total amount of the first element is Z (mass %), the following are met: 0.40≦Y/X≦2.00 0.10≦Z/X≦0.40.
Abstract translation: 具有主要成分为氧化铝和含硅的火花塞的绝缘体包括位于氧化铝颗粒之间的晶界相。 晶界相包含：2A族元素; 稀土元素; 和至少一种锆，钛，铬，铌，锰和铁（第一元素）。 假设稀土元素的总量为X（质量％），则2A族元素的总量为Y（质量％），第一元素的总量为Z（质量％），以下为 满足：0.40＆nlE; Y / X＆nlE; 2.00 0.10＆nlE; Z / X＆lt;
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Patent Agency Ranking
公开(公告)号：US20210037613A1
公开(公告)日：2021-02-04
申请号：US16975527
申请日：2019-11-13
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Ryunosuke SAKAMAKI , Katsuya TAKAOKA , Hiroshi WATANABE
IPC: H05B3/28
Abstract: A holding device including a ceramic member formed of a sintered ceramic material containing aluminum nitride as a main component, a heating resistor element formed of a metal and disposed in the ceramic member, an electrically conductive electricity supply connection member in contact with the heating resistor element, and an electrically conductive electricity supply terminal electrically connected to the electricity supply connection member. The holding device holds an object on the surface of the ceramic member. In the holding device, at least a portion of the surface of the electricity supply connection member, excluding its contact surface for contact with the heating resistor element and its connection surface for connection with the electricity supply terminal, is covered with a coat layer formed of a nitride containing at least one of Al, Ti, Zr, V, Ta, and Nb. Also disclosed is a method of manufacturing the holding device.
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公开(公告)号：US20180358784A1
公开(公告)日：2018-12-13
申请号：US16001451
申请日：2018-06-06
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Hironori UEGAKI , Shoma TSUMAGARI , Kazuhiro KUROSAWA , Katsuya TAKAOKA , Kuniharu TANAKA
Abstract: A spark plug has an insulator, a rod-shaped electrode member disposed in an axial hole of the insulator, and a cylindrical magnetic member disposed on an outer circumference of the electrode member within the axial hole. The insulator includes a large inner diameter region, a middle inner diameter region located frontward of the large inner diameter region and having an inner diameter smaller than that of the large inner diameter region, and a small inner diameter region located frontward of the middle inner diameter region and having an inner diameter smaller than that of the middle inner diameter region. The electrode member is retained on a step portion of the insulator between the middle inner diameter region and the small inner diameter region. The magnetic member is positioned in the axial hole at a location within the large inner diameter region.
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公开(公告)号：US20150349498A1
公开(公告)日：2015-12-03
申请号：US14723506
申请日：2015-05-28
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Katsuya TAKAOKA , Kazuhiro KUROSAWA , Kuniharu TANAKA , Haruki YOSHIDA , Hirokazu KURONO , Toshitaka HONDA
IPC: H01T13/04
Abstract: A spark plug including an insulator having an axial hole, a center electrode held at one end side and a terminal electrode held at the other end side of the axial hole, an electrical connection portion electrically connecting the center electrode and the terminal electrode inside the axial hole, wherein the electrical connection portion includes a conductor including a ceramic phase and a metal wire having a spiral structure portion, wherein the metal wire has a wire diameter of 0.1 mm or greater and 0.5 mm or smaller, and wherein the spiral structure portion of the metal wire is configured such that an outer diameter thereof is 1.0 mm or greater and 3 mm or smaller, a pitch thereof is 0.3 mm or greater and 1 mm or smaller, and a height thereof is 8 mm or greater and 30 mm or smaller.
Abstract translation: 一种火花塞，其包括具有轴孔的绝缘体，一端保持的中心电极和保持在所述轴孔的另一端侧的端子电极，在所述轴向孔内电连接所述中心电极和所述端子电极的电连接部 其特征在于，所述电连接部包括具有陶瓷相的导体和具有螺旋结构部的金属线，所述金属线的线径为0.1mm以上且0.5mm以下，其特征在于， 金属线的外径为1.0mm以上且3mm以下，间距为0.3mm以上且1mm以下，高度为8mm以上且30mm以下 。
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公开(公告)号：US20220059263A1
公开(公告)日：2022-02-24
申请号：US17421201
申请日：2020-03-11
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Hiroshi WATANABE , Satoshi MORI , Manami FUJII , Katsuya TAKAOKA , Hiroki TAKEUCHI , Hisashi KOZUKA
Abstract: The iron loss of a dust core is reduced. A dust core (1) includes soft magnetic metal particles (3) having an average particle size of 5 μm or more and 30 μm or less, and a particle boundary phase (6). The particle boundary phase (6) includes a polycrystalline compound containing Al (aluminum). When a sectional structure of the dust core (1) is observed, an area percentage of α-Al2O3 in the particle boundary phase (6) is 75% or less. An average thickness Ta of the particle boundary phase (6) is 10 nm or more and 300 nm or less. According to the present invention, the iron loss is reduced.
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公开(公告)号：US20180375298A1
公开(公告)日：2018-12-27
申请号：US16064772
申请日：2016-09-19
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kazuhiro KUROSAWA , Katsuya TAKAOKA , Kuniharu TANAKA , Toshitaka HONDA , Hirokazu KURONO , Hironori UEGAKI
Abstract: The present invention allows reduction in high frequency noise of a spark plug. A Fe-containing oxide layer is formed on the surface of a beneath-flange rod-shaped portion, of a metal terminal of the spark plug, between a terminal flange portion and an upper end of a metal shell. The surface area of the Fe-containing oxide layer is not less than 10% of the surface area of the beneath-flange rod-shaped portion.
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