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Patent Agency Ranking
公开(公告)号：US20160087410A1
公开(公告)日：2016-03-24
申请号：US14856777
申请日：2015-09-17
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Jumpei KITA , Haruki YOSHIDA
Abstract: A spark plug having an insulator that includes a first portion which accommodates a front end of the metallic terminal. A portion of the metallic terminal has a roughened surface portion with a Vickers hardness of 200 Hv or greater and 320 Hv or smaller. A first ratio of an outside diameter of the roughened surface corresponding to at least a part of the first portion of the insulator to the first bore diameter of the insulator is 0.90 or greater. A second ratio of the first bore diameter to the second bore diameter of the insulator is 0.80 or greater and 0.98 or smaller.
Abstract translation: 一种具有绝缘体的火花塞，包括容纳金属端子前端的第一部分。 金属端子的一部分具有维氏硬度为200Hv或更大且320Hv或更小的粗糙表面部分。 对应于绝缘体的第一部分的至少一部分的粗糙表面的外径与绝缘体的第一孔直径的第一比率为0.90或更大。 绝缘体的第一孔径与第二孔径的第二比例为0.80以上且0.98以下。
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公开(公告)号：US20160204580A1
公开(公告)日：2016-07-14
申请号：US14912753
申请日：2014-08-08
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Haruki YOSHIDA , Takamitsu MIZUNO , Masaaki KUMAGAI , Jumpei KITA , Yoshitomo IWASAKI , Toshitaka HONDA
Abstract: A spark plug includes an insulator having an axial hole, a center electrode inserted into a forward portion of the axial hole, a terminal electrode inserted into a rear portion of the axial hole, and an interelectrode insert which contains glass and electrically conductive carbon and is disposed in the axial hole between the center electrode and the terminal electrode. The interelectrode insert has a resistance of 1.0 kΩ to 3.0 kΩ, and the interelectrode insert has a carbon content of 1.5% by mass to 4.0% by mass at a forward portion located forward of a center point between the rear end of the center electrode and the forward end of the terminal electrode. Furthermore, the forward portion is lower in resistance than a rear portion of the interelectrode insert located rearward of the center point.
Abstract translation: 火花塞包括具有轴向孔的绝缘体，插入到轴向孔的前部的中心电极，插入到轴向孔的后部的端子电极和包含玻璃和导电性碳的电极间插入件 设置在中心电极和端子电极之间的轴向孔中。 电极间插入物的电阻为1.0 k＆OHgr; 至3.0kΩ，并且电极间插入物在位于中心电极的后端和端子电极的前端之间的中心点的前部的碳含量为1.5质量％至4.0质量％。 此外，前部的电阻低于位于中心点后方的电极间插入件的后部。
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公开(公告)号：US20160204579A1
公开(公告)日：2016-07-14
申请号：US14913772
申请日：2014-06-02
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Haruki YOSHIDA , Jumpei KITA , Yoshitomo IWASAKI , Toshitaka HONDA
Abstract: A resistor element of a spark plug containing ZrO2, wherein a target region is defined by a rectangular region where the size in the direction perpendicular to an axial line is 1800 μm and the size in the direction of the axial line is 2400 μm. In the case where the target region is divided into a plurality of square regions having lengths of 200 μm on a side, a transverse line-shaped region is defined by a region in a line shape that is constituted of nine square regions arranged in the direction perpendicular to the axial line. A first type region is defined by the square region where a proportion of an area of ZrO2 is 25% or more, and a second type region is defined by the square region where a proportion of an area of ZrO2 is less than 25%.
Abstract translation: 包含ZrO 2的火花塞的电阻元件，其中，目标区域由与轴线垂直的方向的尺寸为1800μm，轴线方向的尺寸为2400μm的矩形区域限定。 在目标区域被分成多个长度为200μm的方形区域的情况下，横向线状区域由线状形状的区域限定，该区域由方向上排列的9个正方形区域 垂直于轴线。 第一类型区域由ZrO 2面积的比例为25％以上的正方形区域限定，第二类型区域由ZrO 2的面积比例小于25％的正方形区域构成。
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公开(公告)号：US20180175592A1
公开(公告)日：2018-06-21
申请号：US15738510
申请日：2016-05-24
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Hironori UEGAKI , Hirokazu KURONO , Jumpei KITA
Abstract: A spark plug including a metal shell having a ground electrode, a cylindrical ceramic insulator held in the metal shell and having therein an axial hole having a small-diameter portion, and a large-diameter portion larger in diameter than the small-diameter portion and connected to a rear end of the small-diameter portion via a stepped portion, a resistor arranged in the large-diameter portion, a center electrode having: a flange portion projecting in a radial direction in the large-diameter portion to contact with the stepped portion; and a leg portion arranged in the small-diameter portion so as to extend from the flange portion toward the front end side, and a seal body arranged in the large-diameter portion and electrically connecting between the center electrode and the resistor. The seal body includes an insulating seal body that comes into contact with the ceramic insulator, and a conductive seal body.
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公开(公告)号：US20150069902A1
公开(公告)日：2015-03-12
申请号：US14478651
申请日：2014-09-05
Applicant: NGK Spark Plug Co., LTD.
Inventor： Jumpei KITA , Haruki YOSHIDA , Takamitsu MIZUNO
Abstract: A spark plug includes an insulator, a terminal electrode, a center electrode, a resistor, and a glass seal layer. The terminal electrode has: a recess part opened to the front end side and having a depth in a center axis direction of the terminal electrode; and a flat part neighboring the recess part at its outer circumference side. The relationship 0.52≦B/A≦0.91 is satisfied, wherein A (mm2) represents an area of a region surrounded by an outline of an outer circumference surface of the terminal electrode, and B (mm2) which represents an area of a region of the terminal electrode surrounded by an outline of an inner surface of the recess part, in a cross section orthogonal to the center axis and located 0.1 mm away from a front end along the center axis to the rear end side.
Abstract translation: 火花塞包括绝缘体，端子电极，中心电极，电阻器和玻璃密封层。 端子电极具有：开口到前端侧并具有端子电极的中心轴方向的深度的凹部; 以及在其外周侧与凹部相邻的平坦部。 满足0.52＆nlE; B / A＆nlE; 0.91的关系，其中A（mm2）表示由端子电极的外周面的轮廓包围的区域的面积，B（mm2）表示区域的面积 在垂直于中心轴线的截面中沿着中心轴线至后端侧位于距离前端0.1mm的位置上，由凹部的内表面的轮廓包围的端子电极。
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