Patents Assigned to NGK Spark Plug Co., Ltd.
  • Patent number: 10680416
    Abstract: A tip is welded appropriately using an energy beam. The tip is welded to a base portion by irradiating the interface between the base portion and the tip with the energy beam. The welding the tip to the base portion includes: applying the energy beam continuously, while moving the irradiation position of the energy beam, in a first period of time; and applying the energy beam a plurality of times according to a pulsed output pattern, while moving the irradiation position of the energy beam, in a second period of time subsequent to the first period of time.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: June 9, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Yusuke Tenkumo, Susumu Imai
  • Patent number: 10671103
    Abstract: A voltage supply apparatus for supplying a voltage to a detection circuit, including a power supply filter (4) and a control section (5) which supply a sensor drive voltage Vbg to a sensor device (2) having a ratiometric characteristic. The power supply filter (4) has supply paths PL1 and PL2. The control section (5) determines whether or not a switching determination time has elapsed after startup. In the case where the switching determination time has not yet elapsed, the power supply filter (4) supplies the sensor drive voltage Vbg through supply path PL1. In the case where the switching determination time has elapsed, the power supply filter (4) supplies the sensor drive voltage Vbg through supply path PL2. The response of the sensor drive voltage Vbg to a variation in power supply voltage Vcc is slower when supplied through the supply path PL2 than through the supply path PL1.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: June 2, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventor: Yuzo Higuchi
  • Patent number: 10669963
    Abstract: An anomaly determination apparatus determines an anomaly of a current control apparatus which supplies a control current to a control target and includes a current anomaly determination section. The current anomaly determination section is configured to compare a normal numerical range within which a state quantity changing with the control current falls in a particular state with a particular state quantity which is the state quantity corresponding to the control current generated by the control current generation section in the particular state, and determine that at least one of the reference resistor, the reference current generation section, and the control current generation section is in an anomalous state in the case where the particular state quantity has deviated from the normal numerical range. By using the current anomaly determination section, the anomaly determination apparatus can determine an anomaly of the current control apparatus.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: June 2, 2020
    Assignee: NGK Spark Plug Co., LTD.
    Inventors: Junichiro Mitsuno, Satoru Abe, Chihiro Tomimatsu, Hidetoshi Makino
  • Patent number: 10674614
    Abstract: A wiring substrate for electronic component inspection apparatus includes a first laminate which is formed by stacking a plurality of ceramic layers and which has a front surface and a back surface, and a plurality of studs joined to the back surface of the first laminate Each of the studs is composed of a flange portion which is circular in bottom view, and a bolt portion which perpendicularly extends from a center portion of an outside surface of the flange portion. The flange portion has a truncated conical shape and the outside surface from which the bolt portion protrudes, such that the outside surface slopes from the proximal end side of the bolt portion toward the peripheral edge of the flange portion and gradually approaches the inside surface of the flange portion.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: June 2, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Takakuni Nasu, Masaomi Hattori
  • Patent number: 10666023
    Abstract: A spark plug includes: a center electrode; an insulating member; a metal shell; a ground electrode; and a cap covers an opening of the metal shell on the front end side to define an auxiliary combustion space in which the gap is disposed, a first angle being formed by a second line and a first tangent line, a second angle being formed by the second line and a second tangent line, the second angle being greater than the first angle, and at least a portion of the opening of the specific through hole on the auxiliary combustion space side being positioned on a range of the second angle.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: May 26, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventor: Tatsuya Gozawa
  • Patent number: 10665761
    Abstract: An optical wavelength conversion member including a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains of a component represented by formula A3B5O12:Ce, wherein A is at least one element selected from Sc, Y and lanthanoids (except for Ce), and B is at least one element selected from Al and Ga. Further, the following relations are satisfied: 0%?X?25%, 9%?Y?45%, and 48%?Z?90%, wherein X represents a proportion corresponding to the ratio a/N, Y represents a proportion corresponding to the ratio b/N, and Z represents a proportion corresponding to the ratio c/N and a, b, c and N are as defined herein. Also disclosed is a light-emitting device including the optical wavelength conversion member.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: May 26, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Jun Moteki, Shohei Takaku, Yusuke Katsu, Takeshi Mitsuoka, Tsuneyuki Ito
  • Patent number: 10665872
    Abstract: A fuel cell stack including a plurality of electricity generation units fastened by means of a plurality of fastening members. Each electricity generation unit includes a single cell, and a sealing member sandwiched between two other members thereby sealing one of the anode chamber and the cathode chamber. The surface of the sealing member included in at least one electricity generation units, the surface facing either of the two other members, has a surface roughness Ra of 3.0 ?m or less.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: May 26, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Nobuyuki Hotta, Hideki Ishikawa, Shunta Ohashi, Yasuki Izutsu
  • Patent number: 10661378
    Abstract: Disclosed is a method for manufacturing a spark plug of the type in which a tip is joined to a ground electrode. In a positioning step, the ground electrode is positioned with respect to a first electrode by means of a pressing member. In a tip pressing step, the tip is pressed against a tip weld site of the ground electrode by means of a second electrode. In a welding step, the tip is resistance welded to the tip weld site of the ground electrode by the passage of electric current between the first and second electrodes.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: May 26, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventor: Shunsuke Maki
  • Patent number: 10660990
    Abstract: A method of producing an article with a foamed surface which includes: a step 1 of forming small pores in a surface of a base made of a plastic to produce a base with small pores; a step 2 of immersing the base with small pores, obtained in step 1, in a solution including a foaming agent to prepare a foaming agent-including base; a step 3 of immersing the foaming agent-including base, obtained in step 2, in a foaming solution that makes the plastic swell and the foaming agent foam to prepare a foamed base; and a step 4 of immersing the foamed base, obtained in step 3, in a coagulating solution that coagulates the swollen plastic.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: May 26, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Shinjiro Kasahara, Takenori Sawamura
  • Patent number: 10663426
    Abstract: A sensor controller includes a signal reception determination section and a use suspension section. The signal reception determination section determines whether or not the sensor controller has received a specific state signal that indicates a specific state in which exhaust gas may contain a specific gas that differs from ammonia and reacts with an ammonia sensor. When the signal reception determination section determines that the sensor controller has received the specific state signal, the use suspension section suspends at least temporarily use of a detection result detected by the ammonia sensor after the determination. Specifically, upon reception of the specific state signal, the sensor controller suspends at least temporarily the use of the detection result detected by the ammonia sensor after the reception of the specific state signal.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: May 26, 2020
    Assignee: NGK Spark Plug Co., LTD.
    Inventor: Yoshihiro Nakano
  • Publication number: 20200153207
    Abstract: A spark plug that prevents a decrease in strength of a member to which a mark is attached while ensuring a readability of the mark, and a method of manufacturing the spark plug. The spark plug is configured to ignite an air-fuel mixture in an internal combustion engine. The spark plug includes: a mark formed of an oxide film generated on a surface of a metallic member or is formed of the metallic member and the oxide film; and a coating material covering the whole mark and allowing transmission of light.
    Type: Application
    Filed: October 30, 2019
    Publication date: May 14, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventor: Naoki SADAKA
  • Publication number: 20200153019
    Abstract: An electrochemical cell including a solid electrolyte layer containing ZrO2 containing a first rare earth element; a cathode disposed on one side of the solid electrolyte layer; and an anode disposed on the other side of the solid electrolyte layer. The anode contains CeO2 containing a second rare earth element and Ni or an Ni-containing alloy. The electrochemical cell further includes an intermediate layer disposed between the solid electrolyte layer and the anode. The intermediate layer contains a solid solution containing Zr, Ce, the first rare earth element, and the second rare earth element. Also disclosed is an electrochemical stack including a plurality of the electrochemical cells, where the electrochemical stack is a solid oxide fuel cell stack or a solid oxide electrolysis cell stack.
    Type: Application
    Filed: May 17, 2018
    Publication date: May 14, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Keisuke YAMADA, Yoshihiro FUNAHASHI, Katsuya YAMAGIWA
  • Patent number: 10651630
    Abstract: A spark plug electrode wearing rate estimating method for a spark plug in which spark discharge occurs between two electrodes by application of voltage generated by an ignition coil, includes the step of estimating a wearing rate of a first electrode in one spark discharge based on a temperature of the first electrode, and a spark discharge voltage and supply energy from the ignition coil. The first electrode contains any one of Ir, Ru, W, and Ni as a main component.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: May 12, 2020
    Assignee: NGK Spark Plug Co., LTD.
    Inventor: Takahiro Karumi
  • Patent number: 10651632
    Abstract: A spark plug includes a tip extending in a first direction and an electrode base metal having an extending portion extending in the first direction and connected to the tip through a fusion zone. In a section taken along the first direction and containing a center axis of the tip, in a case where two ends of the interface between the extending portion and the fusion zone are located at the same position with respect to the first direction, the linear distance between the ends is denoted by A, or, in a case where one end is located forward of the other end, the distance from the one end to an intersection between a straight line passing the one end and extending perpendicularly to the center axis and the outline of the fusion zone is denoted by A. The interface length B satisfies a relational expression B/A?1.2.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: May 12, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventor: Junji Kimura
  • Patent number: 10644483
    Abstract: A plurality of assemblies are prepared, and a predetermined voltage is applied to a center electrode of each of the plurality of assemblies. The voltage applied to each of the plurality of center electrodes is detected by respective voltage sensors, and a differentiated value is calculated by differentiating the applied voltage, detected by each voltage sensor, with respect to time. A judgment is made as to whether or not a differentiated value change state in which an absolute value of the differentiated value becomes equal to or greater than a predetermined threshold value occurs. A judgment is made as to whether or not the occurrence of the differentiated value change state is caused by the noise, according to the voltage applied, for a specific time from the occurrence of the differentiated value change state, to the center electrode where the differentiated value change state has occurred.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: May 5, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventor: Masafumi Okuda
  • Patent number: 10639736
    Abstract: A ceramic-metal structure in which a metallic body (2) is inserted into or disposed above a through hole (4h) of a ceramic substrate (4) and which includes an annular pad layer (6) disposed around the through hole; an annular ring member (8) joined to the pad layer via a first brazing filler portion (10) and having a coefficient of thermal expansion smaller than that of the metallic body; a second brazing filler portion (12) intervening between the ring member and metallic body; and brazing filler flow prevention layers (7a, 7b) covering an outer surface of the pad layer so as to expose a central region (6c) of the outer surface of the pad layer facing the first brazing filler portion. The first brazing filler portion joins the central region and the ring member without projecting to a radially inner or outer side of the flow prevention layers.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: May 5, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Muneyuki Iwata, Yoshiaki Nagaya, Toshikazu Horio, Shigeyuki Yamamoto
  • Patent number: 10633289
    Abstract: Disclosed is a manufacturing method of a gas sensor element. The gas sensor element has a plate shape extending in a direction of an axis thereof and includes: a detection portion arranged on a front end side of the gas sensor element to detect a specific gas component in a gas under measurement; and a porous protective layer formed around the detection portion. The manufacturing method of the gas sensor element is characterized in that the porous protective layer is formed by press forming of a raw material powder.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: April 28, 2020
    Assignee: NGK SPARK PLUG CO., LTD
    Inventors: Yuri Saito, Tatsuhiko Muraoka, Masaki Nakagawa
  • Patent number: 10637212
    Abstract: A method for manufacturing an insulator for a spark plug includes a molding process of forming a cylindrical molded product having an axial hole that extends in a direction of an axial line, by means of injection molding using a mold that has a columnar cavity therein and a bar-shaped member disposed in the cavity and extending in the direction of the axial line. In this method, the molding process includes an injection step of injecting a material containing a ceramic. In the injection step, the material is injected into the cavity from a plurality of injection openings that are opened at an inner circumferential surface, of the mold, that forms the cavity. The plurality of injection openings include two or more injection openings located at different positions in the direction of the axial line, or two or more injection openings located at different positions in a circumferential direction.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: April 28, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Hironori Uegaki, Hirokazu Kurono, Toshitaka Honda, Hiroyuki Hazama
  • Patent number: 10634639
    Abstract: A method for producing a gas sensor element (10), the gas sensor element including a diffusive porous layer (113) disposed in a measurement chamber (111) and exposed to the outside and a ceramic insulating layer (115) forming sidewalls of the measurement chamber. The method includes transferring green diffusive porous layer pieces (113x) cut in advance so as to have prescribed dimensions onto a first ceramic green sheet (110x); applying an insulating paste which later becomes the ceramic insulating layer to the first ceramic green sheet; laminating the first ceramic green sheet onto a second ceramic green sheet (120x) to form a ceramic laminate (200x); cutting the ceramic laminate along prescribed cutting lines C to obtain a plurality of gas sensor element pieces 10x; and firing the gas sensor element pieces.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: April 28, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Ai Igarashi, Kouji Toida, Akinori Kojima, Akihiro Hara, Hitoshi Furuta
  • Patent number: 10637075
    Abstract: A fuel cell stack including a plurality of electricity generation units fastened by means of a plurality of fastening members. Each electricity generation unit includes a single cell, and a sealing member sandwiched between two other members thereby sealing one of the anode chamber and the cathode chamber. The surface of the sealing member included in at least one electricity generation units, the surface facing either of the two other members, has a surface roughness Ra of 3.0 ?m or less.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: April 28, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Nobuyuki Hotta, Hideki Ishikawa, Shunta Ohashi, Yasuki Izutsu