Patents Assigned to NGK Spark Plug Co., Ltd.
  • Publication number: 20200121379
    Abstract: A plasma irradiation device has a gas flow channel and an electric field generation section and is provided in a handpiece. The gas flow channel is a flow channel for supplying a gas from the outside of the handpiece to a distal end portion of the acting member. The electric field generation section has a first electrode portion, a second electrode portion, and a dielectric member and is disposed in the gas flow channel. The electric field generation section generates an electric field in a space within the gas flow channel by using a potential difference between the first electrode portion and the second electrode portion, thereby producing low-temperature plasma discharge.
    Type: Application
    Filed: April 13, 2018
    Publication date: April 23, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Shinsuke ITOH, Takaaki YAMADA
  • Publication number: 20200122248
    Abstract: To improve the adhesion resistance and wear resistance of a surface-coated cutting tool. The surface-coated cutting tool includes a tool substrate, and a single-component coating layer composed of a composite nitride of Cr (chromium), Al (aluminum), and V (vanadium) and disposed on the surface of the tool substrate. The composite nitride is characterized by being represented by a compositional formula: CraAlbVcN satisfying the following relations: 0.11?a?0.26; 0.73?b?0.85; 0<c?0.04; and a+b+c?1 (wherein a, b, and c each represent an atomic proportion). The single-component coating layer has both a hexagonal phase and a cubic phase.
    Type: Application
    Filed: May 11, 2018
    Publication date: April 23, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Shota NOZAKI, Fumihiro KIKKAWA, Atsushi KOMURA
  • Patent number: 10629322
    Abstract: An electrically conductive oxide sintered compact according to one embodiment of the present invention includes a crystal phase that has a perovskite oxide crystal structure represented by the composition formula: REaCobCucNidOx where RE is a rare-earth element; a+b+c+d=1; and 1.25?x?1.75, wherein the values of a, b, c and d respectively satisfy the following conditions: 0.474?a?0.512; 0.050?b?0.350; 0?c?0.250; and 0.050?d?0.350.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: April 21, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Hisashi Kozuka, Yasuyuki Okimura, Kazushige Ohbayashi
  • Patent number: 10626501
    Abstract: A heating device includes a holding member having a resistive heating element, a columnar support member joined to the holding member, power receiving electrodes connected to the resistive heating element, and an electrode terminal unit disposed in each of through holes in the columnar support member. Each of the electrode terminal units includes a first columnar member having one end portion connected to the power receiving electrode and the other end portion connected to a metal stranded wire, and a second columnar member having an end portion connected to the metal stranded wire. A columnar member assembly having a portion of the first columnar member and a portion of the second columnar member includes a general portion and a large-diameter portion. The distance between the large-diameter portion and an inner peripheral surface of the through hole is smaller than the distance between the general portion and the inner peripheral surface.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: April 21, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Jun Kurano, Kazutaka Tanaka
  • Patent number: 10627365
    Abstract: A sensor control apparatus for a gas sensor which detects a particular gas component contained in a gas under measurement. In the case where humidity detection is performed using an electromotive-force-type gas sensor, a sensor control apparatus changes a target voltage of an electromotive force cell to a second target voltage for humidity detection and then to a third target voltage which is lower than a first target voltage which is a target voltage used for detecting the concentration of the particular gas component. In the case where humidity detection is performed using a limiting-current-type gas sensor, the sensor control apparatus changes the voltage applied to a pump cell to a second application voltage for humidity detection and then to a third application voltage which is lower than a first application voltage which is an application voltage used for detecting the concentration of the particular gas component.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: April 21, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Dai Nishijima, Satoshi Teramoto
  • Patent number: 10622789
    Abstract: A spark plug includes a metallic shell having a cylindrical trunk portion with a male screw formed on its outer circumferential surface and a seat portion located adjacent to the rear end of the trunk portion and projecting radially outward. The trunk portion has a first region and a second region. The first region extends, in the direction of the axial line, at least over a range extending from the rear end of the trunk portion to a first screw thread portion of the male screw as counted from the rear end of the male screw. The second region is located adjacent to the first region in the circumferential direction. The first region has a Vickers hardness higher than that of the second region.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: April 14, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventor: Ryoki Yagi
  • Patent number: 10619548
    Abstract: A particulate detection system detects the amount of particulates contained in filtered exhaust gas which has passed through a filter and is discharged to the outside of the vehicle. The particulate detection system includes a sensor disposed on the downstream side of the filter; a sensor circuit section which drives the sensor and obtains in real time a sensor output corresponding to the volumetric particulate amount of the particulates contained in the filtered exhaust gas; and a computation section which computes a distance particulate amount which is the weight or number of the particulates discharged per unit travel distance on the basis of the sensor output obtained by the sensor circuit section, travel distance of the vehicle, and flow rate of the exhaust gas.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: April 14, 2020
    Assignee: NGK Spark Plug Co., LTD.
    Inventor: Takeshi Sugiyama
  • Publication number: 20200112146
    Abstract: A spark plug according to one embodiment of the present invention includes an insulator formed of an alumina-based sintered body, wherein the insulator contains 90 wt % or more of an aluminum component in terms of oxide, and wherein crystal grains of the insulator has an average grain size of 1.5 mm or smaller and a grain size standard deviation of 1.2 ?m or smaller.
    Type: Application
    Filed: September 18, 2019
    Publication date: April 9, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Yutaka Yokoyama, Nobuyoshi Araki, Kuniharu Tanaka, Haruki Yoshida, Hironori Uegaki, Toshiki Kon, Yusuke Nomura
  • Patent number: 10615577
    Abstract: A method for manufacturing a spark plug including a reference standard imaging step of imaging a plurality of reference standards to obtain a plurality of reference images, each reference standard having a reference part with a predetermined known dimension; a reference standard measuring step of measuring a measured dimension or a measured number of pixels of the reference part in the plurality of reference images; a regression line deriving step of obtaining a regression line by the least squares method from: the measured dimension or the measured number of pixels of the plurality of reference standards; and the known dimensions; and a determining step of determining whether a target part in a target image is within a predetermined range based on a correction value obtained by correcting a measured dimension of a target part by using a relational expression describing the regression line.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: April 7, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Kota Nishimura, Norihide Kachikawa
  • Patent number: 10612762
    Abstract: The invention provides a wavelength conversion member which can draw heat efficiently away from a region that is prone to generating heat under irradiation of light with a high energy density and which can suppress the thermal quenching of phosphor, and provides a method for manufacturing such wavelength conversion members, and a light-emitting device having such a wavelength conversion member.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: April 7, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Yumi Sato, Yoshifumi Tsutai, Takashi Abe, Yutaka Sato
  • Patent number: 10615060
    Abstract: A heating device includes a holding member and having thereinside a plurality of resistive heating elements connected to different pairs of electrode terminals, and a columnar support joined to the second surface of the holding member. The plurality of resistive heating elements include a first resistive heating element and a second resistive heating element. The first resistive heating element is disposed throughout a first region including a region that overlaps the columnar support member as viewed from the first direction and a second region that is located around the outer periphery of the first region and that does not overlap the columnar support member as viewed from the first direction. The second resistive heating element is disposed at a position closer to the first surface than the first resistive heating element in the first direction and is disposed in only the first region.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: April 7, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventor: Jun Kurano
  • Publication number: 20200106246
    Abstract: A spark plug includes: an insulator with an axial hole; a center electrode held in a front end side of the axial hole; a cylindrical metal shell disposed around the insulator and having a seal part brought into contact with an outer circumferential surface of the insulator; a ground electrode arranged to form a gap with the center electrode; and a cap connected to a front end part of the metal shell to define therein an auxiliary combustion space in which the gap is formed, the cap having at least one through hole formed to provide communication between the auxiliary combustion space and the outside, wherein the condition (B/A)?0.25 is satisfied where A represents a volume of an imaginary space defined at a position frontward of the seal part; and B represents a volume of parts of the ground and center electrodes located in the imaginary space.
    Type: Application
    Filed: August 23, 2019
    Publication date: April 2, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventor: Tatsuya GOZAWA
  • Patent number: 10608416
    Abstract: The spark plug includes: an insulator having an axial hole formed along an axial line; and a metal terminal provided on a rear side of the axial hole of the insulator. The metal terminal has, at a rear end portion thereof, a bottom surface facing rearward and a projection projecting rearward from an outer edge of the bottom surface, and a mark is provided to at least a part of the bottom surface. The Vickers hardness of the projection is 100 HV or higher. A rear end surface of the projection is positioned on a rear side with respect to a rear end of the mark. An area of the rear end surface is 3 mm2 or greater.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: March 31, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventor: Mai Nakamura
  • Publication number: 20200099065
    Abstract: An electrochemical reaction cell stack including a plurality of unit cells and flat plate-shaped electrically conductive members arranged in a first direction. The electrically conductive members include: a first member having a first surface including a first flat portion and a protruding portion and a second member both located on the first side of the first member in the first direction, the second member having a second surface facing the first surface and including a second flat portion and a recessed portion facing the protruding portion. The thickness of the second member is larger than the thickness of the first member in the first direction. The depth of the recessed portion of the second member from the second flat portion is larger than the protruding length of the protruding portion of the first member from the first flat portion in the first direction.
    Type: Application
    Filed: May 31, 2018
    Publication date: March 26, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Kenta MANABE, Takeshi OHNO
  • Patent number: 10598628
    Abstract: A gas sensor includes a sensor element having electrode pads, metal terminal members connected to the respective electrode pads, separators, and lead wires connected to the rear ends of the metal terminal members. Each metal terminal member has a forward locking portion and a rear locking portion provided at the forward and rear ends, respectively. The separator is composed of a forward separator and a rear separator connected to each other. The forward separator includes a first locking portion having a rearward-facing surface, and the rear separator includes a second locking portion having a forward-facing surface. The metal terminal member is held between the forward separator and the rear separator in a state in which the forward locking portion is in locking engagement with the rearward-facing surface and the rear locking portion is in locking engagement with the forward-facing surface.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: March 24, 2020
    Assignee: NGK Spark Plug Co., LTD.
    Inventors: Shogo Nagata, Takehiro Oba, Shunya Mihara, Kenji Masuda
  • Patent number: 10601202
    Abstract: A spark plug enabling suppression of reduction in the strength of an insulator. In the spark plug, a rear end portion of an engagement portion formed on an outer peripheral surface of a tubular insulator extending along an axial line from a front side to a rear side, is engaged with a to-be-engaged portion of a tubular metal shell disposed on the outer peripheral surface of the insulator. The insulator is made from ceramic such as alumina. On at least a part of the outer peripheral surface of the insulator, a projected and recessed portion is formed on the front side relative to the engagement portion so as to helically extend in a circumferential direction of the insulator.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: March 24, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Kengo Fujimura, Kimihiro Nishizono, Hiroki Ota
  • Patent number: 10590341
    Abstract: The invention provides a wavelength conversion member and a light emitting device which each has a reduced proportion of voids and transmits less source light without causing a decrease in light conversion efficiency offered by phosphor particles having a large particle size. A wavelength conversion member 100 is configured to convert light with a specific wavelength to light with other wavelength, and includes a substrate 110 including an inorganic material, and a phosphor layer 120 joined to the substrate 110 and including phosphor particles 122 that absorb light and emit converted light and a translucent ceramic 121 that binds the phosphor particles 122 to one another. The phosphor particles 122 include two kinds of particles each having a designated particle size distribution.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: March 17, 2020
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Yumi Sato, Yoshifumi Tsutai, Takashi Abe, Yutaka Sato
  • Publication number: 20200080989
    Abstract: Provided is an exhalation sensor that utilizes heat effectively and can operate with low power consumption. The exhalation sensor has a surface layer on its surface that faces a sensor main body, and the performance of the surface layer to reflect radiant heat is higher than that of a housing. Specifically the radiant heat reflectivity of the surface layer is higher than that of the housing. Therefore, the surface layer can reflect radiant heat emitted from the sensor main body more efficiently than the housing. The radiant heat emitted from the sensor main body is less likely to escape to the outside of the housing, so that the heat generated by a heater of the sensor main body can be efficiently stored within the housing. This can reduce the power consumed by the heater to heat a conversion section and a sensing section to their operating temperatures.
    Type: Application
    Filed: October 27, 2017
    Publication date: March 12, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Takafumi SHICHIDA, Kenji NISHIO, Masatoshi UEKI, Tsuyoshi INOUE
  • Publication number: 20200083545
    Abstract: An electrochemical reaction unit includes a unit cell including an electrolyte layer, and a cathode and an anode which face each other in a first direction with the electrolyte layer intervening therebetween, and one or a plurality of structural members. The electrochemical reaction unit further includes a glass seal member which contains glass and is in contact with two members facing each other in the first direction, the two members being selected from the unit cell and the one or the plurality of structural members. The glass seal member contains a plurality of crystal grains each having a ratio of a vertical dimension in the first direction to a horizontal dimension in a second direction orthogonal to the first direction of 1.5 or more.
    Type: Application
    Filed: November 22, 2017
    Publication date: March 12, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Yoshiaki SATO, Ryoji TANIMURA, Kenta EGUCHI, Makoto KURIBAYASHI
  • Publication number: 20200083674
    Abstract: The spark plug includes an insulator, a metal shell, and a buffering member. The buffering member is filled in a space that is enclosed by an inner peripheral surface of the metal shell and an outer peripheral surface of the insulator. 3 mm2?L×T is satisfied in a case where: a length in a direction of an axial line of a filled portion filled with the buffering member is defined as a filling length L; a thickness, of a screw portion of the metal shell, that is half a difference left after subtraction of the inner diameter of the metal shell from the pitch diameter of the screw portion is defined as an effective thickness; and a minimum value of the effective thickness of a portion, of the screw portion, present rearward of an inner diameter reduction portion of the metal shell is defined as a minimum thickness T.
    Type: Application
    Filed: August 8, 2017
    Publication date: March 12, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventor: Susumu IMAI