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    Particulate detection apparatus
    31.
    发明授权
    Particulate detection apparatus 有权

    公开(公告)号：US11137332B2

    公开(公告)日：2021-10-05

    申请号：US16505262

    申请日：2019-07-08

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Takeshi Sugiyama ,  Yoshinori Hibino

    IPC: G01N15/06 ,  B01D46/44 ,  B01D46/00 ,  F01N11/00 ,  G01N15/00

    Abstract: A particulate detection apparatus for controlling a particulate sensor which detects the amount of particulates discharged from a filter for collecting particulates contained in exhaust gas. The particulate sensor includes a detection section configured to electrify particulates contained in exhaust gas so as to produce electrified particulates. The particulate detection apparatus includes a period judgment section, an output obtainment section and an anomaly judgment section. The period judgment section judges whether or not the present point in time is within a previously set anomaly determination period just after completing a filter regeneration process. The output obtainment section obtains a sensor output representing the result of detection by the particulate sensor in the case where the present point in time is judged to be within the anomaly determination period. The anomaly judgment section judges whether or not the particulate sensor is anomalous based on the sensitivity characteristic of the sensor output.

    Spark plug having a plurality of ground electrodes
    32.
    发明授权
    Spark plug having a plurality of ground electrodes 有权

    公开(公告)号：US11128109B2

    公开(公告)日：2021-09-21

    申请号：US16763601

    申请日：2019-01-18

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Kei Takahashi ,  Daisuke Kasahara

    IPC: H01T13/46 ,  H01T13/32

    Abstract: A spark plug includes: a central electrode extending from a front end side to a rear end side along an axis; an insulator including a front end section formed to be a bottomed tube surrounding a tip of the central electrode; a metal shell shaped to be tubular and structured to support the insulator such that the front end section of the insulator projects to the front end side from a front end section of the metal shell; and a plurality of ground electrodes each of which includes a first end forming a discharge gap with the front end section of the insulator and includes a second end connected to the front end section of the metal shell. The plurality of ground electrodes include a pair of ground electrodes different from each other in size of their discharge gaps.

    Pressure sensor having a heat receiver including a first portion and a second portion
    33.
    发明授权
    Pressure sensor having a heat receiver including a first portion and a second portion 有权

    公开(公告)号：US11112324B2

    公开(公告)日：2021-09-07

    申请号：US16622319

    申请日：2018-10-25

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Daisuke Kasahara ,  Hirotaka Saito

    IPC: G01L9/00 ,  G01L23/18 ,  G01L23/10 ,  G01L19/14

    Abstract: A pressure sensor includes: a housing having a tubular shape, and including a front end including an opening; a diaphragm that is disposed to close the opening, and is structured to deform depending on a pressure exerted on a front side of the diaphragm, and includes a hole extending rearwardly from a front end face of the diaphragm; a sensor element structured to output a signal varying depending on an amount of the deformation of the diaphragm; and a heat receiver including a first portion and a second portion. The first portion is disposed in the hole of the diaphragm, and is joined with an inner periphery of the diaphragm defining the hole. The second portion is formed integrally with the first portion, and is disposed adjacent to a front end of the first portion, and is structured to cover the front end face of the diaphragm.

    Substrate holding member
    34.
    发明授权
    Substrate holding member 有权

    公开(公告)号：US11101161B2

    公开(公告)日：2021-08-24

    申请号：US16013340

    申请日：2018-06-20

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Norio Onodera ,  Takashi Teshima

    IPC: H01L21/683 ,  H01L21/687

    Abstract: A substrate holding member includes a base, and a plurality of convex parts formed at an upper surface of the base and configured to hold a substrate at top surfaces thereof. Each convex part has a root portion extending from the upper surface of the base, and a top portion formed on the root portion and including the top surface. In each convex part, a cross-sectional area of the root portion is larger than a cross-sectional area of the top portion. At least a portion including the top surface of the top portion is formed of a holding member made of a material having a greater Young's modulus than a material forming the base. The respective holding members are spaced apart from each other.

    SPARK PLUG
    35.
    发明申请
    SPARK PLUG 有权

    公开(公告)号：US20210257816A1

    公开(公告)日：2021-08-19

    申请号：US17275054

    申请日：2020-06-23

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Hiroki SHIMADA ,  Haruki YOSHIDA ,  Naoya HARATA

    IPC: H01T13/20 ,  H01T21/02

    Abstract: An insulator for a spark plug including a first portion; a second portion located on the rear side of the first portion, an outer diameter F at a front end of the second portion being smaller than an outer diameter of the first portion; a third portion located on the front side of the first portion, an outer diameter D at a rear end of the third portion being smaller than the outer diameter of the first portion and the outer diameter F at the front end of the second portion; a first slope portion connecting the first portion and the second portion; and a second slope portion connecting the first portion and the third portion. A length A of the second slope portion and a length B of the first slope portion satisfy 2.0≤A/B≤3.9, and 0.50≤D/F≤0.88 is satisfied.

    HOLDING DEVICE AND METHOD FOR MANUFACTURING HOLDING DEVICE
    37.
    发明申请
    HOLDING DEVICE AND METHOD FOR MANUFACTURING HOLDING DEVICE 有权

    公开(公告)号：US20210233785A1

    公开(公告)日：2021-07-29

    申请号：US17052349

    申请日：2019-01-08

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Makoto KURIBAYASHI ,  Masahiro INOUE ,  Toshimasa SAKAKIBARA

    IPC: H01L21/67 ,  H01L21/683 ,  H01J37/32 ,  H05B3/28 ,  H05B1/02 ,  B32B9/00 ,  B32B37/12 ,  B32B41/00

    Abstract: A holding device includes a ceramic member and a base member joined together via a joining portion. When a second direction is perpendicular to a first direction and a third direction is perpendicular to the first and second directions, the joining portion includes a first joining part which extends through the joining portion in the second direction, as viewed in the first direction, and whose thickness in the first direction is uniform in an arbitrary cross section perpendicular to the second direction and in an arbitrary cross section perpendicular to the third direction, and at least one second joining part which is located between the first joining part and one end of the joining portion in the third direction and whose thickness in the first direction increases from the first joining part side toward the end of the joining portion in an arbitrary cross section perpendicular to the second direction.

    Ceramic member
    38.
    发明授权
    Ceramic member 有权

    公开(公告)号：US11043401B2

    公开(公告)日：2021-06-22

    申请号：US15941040

    申请日：2018-03-30

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Toshiya Umeki ,  Tetsuo Kitabayashi

    IPC: H01L21/67 ,  H01C1/02 ,  H01L21/683 ,  H01J37/32 ,  H05B3/36 ,  H01L21/687 ,  H05B3/28 ,  H05B6/10

    Abstract: A ceramic heater includes an RF plate having a placement surface on which a wafer is to be placed, and made of a ceramic sintered body in which an RF electrode is embedded; and a heater plate made of a ceramic sintered body in which a heater is embedded, the RF plate and the heater plate being joined with a space interposed therebetween on a side opposite to the placement surface. The relationship among a minimum height H (mm) of the space in a direction perpendicular to the placement surface, a proportion A of a total area of portions where the RF plate and the heater plate are joined, with respect to an area of a plane along the placement surface that is defined by an outer edge of the placement surface, and a distance D (mm) between the RF electrode and the heater, satisfies H/A≤1000 and H/A+(D−H)/(1−A)≥14.

    SILICON NITRIDE-BASED SINTERED BODY AND CUTTING INSERT
    40.
    发明申请
    SILICON NITRIDE-BASED SINTERED BODY AND CUTTING INSERT 有权

    公开(公告)号：US20210155550A1

    公开(公告)日：2021-05-27

    申请号：US17168426

    申请日：2021-02-05

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Hiroko NAKAYAMA ,  Atsushi KOMURA

    IPC: C04B35/584 ,  B23B27/14

    Abstract: A silicon nitride-based sintered body containing silicon nitride-based grains, which are formed of sialon grains. In the silicon nitride-based sintered body, when the size of each silicon nitride-based grain is represented by its maximum grain size, the ratio of the number of silicon nitride-based grains having a maximum grain size of 1 μm or less to the number of the entire silicon nitride-based grains is 70% or higher. Furthermore, in the distribution profile of no. % of silicon nitride-based grains with respect to maximum grain size, the maximum value of no. % (i.e., maximum no. %) of silicon nitride-based grains is 15 no. % or higher. Also disclosed is a cutting insert, which is formed of the silicon nitride-based sintered body.

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