Patents by Inventor Takashi Noro

Takashi Noro has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12158093
    Abstract: A method for estimating a heat generation distribution in a honeycomb structure includes: a first step of allowing a predetermined minute current to flow between electrode layers A1 and B1 to energize a honeycomb structure, and measuring surface potentials at multiple points; a second step of allowing a predetermined minute current to flow between electrode layers A2 and B2 to energize the honeycomb structure, and measuring surface potentials at multiple points; a third step of quantifying, based on the measured surface potentials at the multiple points, at least one of resistances at the multiple points in the honeycomb structure, resistance ratios for energization paths, voltage sharing ratios, and surface potentials of the electrode layers A1, A2, B1 and B2; and a step of estimating a heat generation distribution in the honeycomb structure based on the values quantified in the third step.
    Type: Grant
    Filed: January 24, 2022
    Date of Patent: December 3, 2024
    Assignee: NGK INSULATORS, LTD.
    Inventors: Takashi Noro, Shungo Watanabe, Chikashi Ihara
  • Patent number: 11969721
    Abstract: A method for producing a honeycomb structure includes: a forming step of extruding a forming raw material containing a ceramic raw material mainly based on silicon carbide and metal silicon to obtain a honeycomb formed body, the honeycomb formed body comprising: an outer peripheral wall; and partition walls; a drying step of drying the honeycomb formed body to obtain a honeycomb dried body; and a firing step of firing the honeycomb dried body to obtain a honeycomb fired body. The drying step includes: a first drying step of subjecting the honeycomb formed body to dielectric drying at a frequency of from 2 to 200 MHz so that a moisture scattering rate of the honeycomb formed body after dielectric drying is from 30 to 85%; and a second drying step of subjecting the honeycomb formed body having the moisture scattering rate of from 30 to 85% to hot air drying.
    Type: Grant
    Filed: December 17, 2021
    Date of Patent: April 30, 2024
    Assignee: NGK INSULATORS, LTD.
    Inventors: Masahiro Tokuda, Takashi Noro
  • Publication number: 20230302440
    Abstract: A metal ratio inspection method for inspecting a metal ratio of a thermally sprayed composite material containing at least one metal and at least one ceramic, the method includes: an imaging step (step S11) of imaging the thermally sprayed composite material while irradiating the thermally sprayed composite material with imaging light; and an estimating step (step S12) of estimating a metal ratio of the thermally sprayed composite material based on a luminance distribution of the image of the thermally sprayed composite material obtained in the imaging step.
    Type: Application
    Filed: March 16, 2023
    Publication date: September 28, 2023
    Applicant: NGK Insulators, Ltd.
    Inventors: Rina YOKOI, Takashi NORO, Takamichi SATO
  • Publication number: 20220410137
    Abstract: A honeycomb structure made of ceramics, wherein the honeycomb structure includes: a borosilicate; and silicon particles doped with at least one dopant, the dopant is a Group 13 element or a Group 15 element, the silicon particles have a dopant amount (A) of 1×1016 to 5×1020/cm3, and the honeycomb structure has a silicon particle content (B) of 30 to 80% by mass.
    Type: Application
    Filed: September 2, 2022
    Publication date: December 29, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Makoto HAMAZAKI, Takayuki INOUE, Takashi NORO
  • Publication number: 20220316955
    Abstract: A method for estimating a heat generation distribution in a honeycomb structure includes: a first step of allowing a predetermined minute current to flow between electrode layers A1 and B1 to energize a honeycomb structure, and measuring surface potentials at multiple points; a second step of allowing a predetermined minute current to flow between electrode layers A2 and B2 to energize the honeycomb structure, and measuring surface potentials at multiple points; a third step of quantifying, based on the measured surface potentials at the multiple points, at least one of resistances at the multiple points in the honeycomb structure, resistance ratios for energization paths, voltage sharing ratios, and surface potentials of the electrode layers A1, A2, B1 and B2; and a step of estimating a heat generation distribution in the honeycomb structure based on the values quantified in the third step.
    Type: Application
    Filed: January 24, 2022
    Publication date: October 6, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Takashi NORO, Shungo Watanabe, Chikashi Ihara
  • Publication number: 20220305477
    Abstract: A honeycomb structure according to at least one embodiment of the present invention includes: a honeycomb structure portion having: an outer peripheral wall; and a partition wall arranged inside the outer peripheral wall to define a plurality of cells each extending from a first end surface of the honeycomb structure portion to a second end surface thereof to form a flow path; and a pair of electrode portions arranged on an outer peripheral surface of the outer peripheral wall of the honeycomb structure portion. The electrode portions are each a porous body in which particles of silicon carbide are bound by a binding material, the silicon carbide contains ?-type silicon carbide and ?-type silicon carbide, and the silicon carbide has a D50 in a volume-based cumulative particle size distribution of 25 ?m or less.
    Type: Application
    Filed: December 15, 2021
    Publication date: September 29, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Masaki HOURA, Takayuki INOUE, Takashi NORO
  • Publication number: 20220258149
    Abstract: A method for producing a honeycomb structure includes: a forming step of extruding a forming raw material containing a ceramic raw material mainly based on silicon carbide and metal silicon to obtain a honeycomb formed body, the honeycomb formed body comprising: an outer peripheral wall; and partition walls; a drying step of drying the honeycomb formed body to obtain a honeycomb dried body; and a firing step of firing the honeycomb dried body to obtain a honeycomb fired body. The drying step includes: a first drying step of subjecting the honeycomb formed body to dielectric drying at a frequency of from 2 to 200 MHz so that a moisture scattering rate of the honeycomb formed body after dielectric drying is from 30 to 85%; and a second drying step of subjecting the honeycomb formed body having the moisture scattering rate of from 30 to 85% to hot air drying.
    Type: Application
    Filed: December 17, 2021
    Publication date: August 18, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Masahiro TOKUDA, Takashi NORO
  • Patent number: 10773207
    Abstract: A conductive honeycomb structure, comprising: a columnar ceramic honeycomb structure portion comprising an outer peripheral side wall and partition walls each disposed inside the outer peripheral side wall and defining a plurality of cells penetrating from one bottom surface to another bottom surface to form flow paths; a pair of electrode layers disposed on an outer surface of the outer peripheral side wall across a central axis of the honeycomb structure portion; and a pair of metal terminals joined to the respective electrode layers via one or more welded portions, wherein each of the one or more welded portions comprises a welded area of from 2 to 50 mm2.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: September 15, 2020
    Assignee: NGK Insulators, Ltd.
    Inventor: Takashi Noro
  • Patent number: 10681779
    Abstract: A conductive honeycomb structure includes: a pillar honeycomb structure portion including an outer peripheral side wall and partition walls, each of the partition walls extending through the pillar honeycomb structure from a first end face to a second end face to define a plurality of cells forming a through channel of a first fluid; a pair of electrode portions disposed in contact with an outer surface of the outer peripheral side wall across a central axis of the honeycomb structure portion; and a pair of terminal connecting portions formed on the outer peripheral side wall, each of the terminal connecting portions being at least partially covered with each of the electrode portions. Each of the electrode portions includes band-shape first, second and third electrode layers each having a predetermined electrical resistance.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: June 9, 2020
    Assignee: NGK Insulators, Ltd.
    Inventor: Takashi Noro
  • Publication number: 20190191493
    Abstract: A conductive honeycomb structure includes: a pillar honeycomb structure portion including an outer peripheral side wall and partition walls, each of the partition walls extending through the pillar honeycomb structure from a first end face to a second end face to define a plurality of cells forming a through channel of a first fluid; a pair of electrode portions disposed in contact with an outer surface of the outer peripheral side wall across a central axis of the honeycomb structure portion; and a pair of terminal connecting portions formed on the outer peripheral side wall, each of the terminal connecting portions being at least partially covered with each of the electrode portions. Each of the electrode portions includes band-shape first, second and third electrode layers each having a predetermined electrical resistance.
    Type: Application
    Filed: December 10, 2018
    Publication date: June 20, 2019
    Applicant: NGK INSULATORS, LTD.
    Inventor: Takashi NORO
  • Patent number: 10208878
    Abstract: A joined body 10 includes a ceramic body 12, a metal member 14, and a joint portion 15 that joins the ceramic body 12 and the metal member 14 together. The joint portion 15 includes a first joint layer 16 joined to the ceramic body 12 and a second joint layer 18 joined to the metal member 14. The first joint layer 16 is disposed on the ceramic body 12 side and contains an alloy that contains Fe and Cr as main components, and a compound having a thermal expansion coefficient of 4.0×10?6 (/° C.) or lower is dispersed in the first joint layer 16. The second joint layer 18 is disposed on the metal member 14 side, contains an alloy that contains Fe and Cr as main components, and has a larger thermal expansion coefficient than the first joint layer 16.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: February 19, 2019
    Assignee: NGK Insulators, Ltd.
    Inventors: Yoshimasa Kobayashi, Kisuke Yamamoto, Yunie Izumi, Takashi Noro
  • Publication number: 20180280872
    Abstract: A conductive honeycomb structure, comprising: a columnar ceramic honeycomb structure portion comprising an outer peripheral side wall and partition walls each disposed inside the outer peripheral side wall and defining a plurality of cells penetrating from one bottom surface to another bottom surface to form flow paths; a pair of electrode layers disposed on an outer surface of the outer peripheral side wall across a central axis of the honeycomb structure portion; and a pair of metal terminals joined to the respective electrode layers via one or more welded portions, wherein each of the one or more welded portions comprises a welded area of from 2 to 50 mm2.
    Type: Application
    Filed: March 28, 2018
    Publication date: October 4, 2018
    Applicant: NGK INSULATORS, LTD.
    Inventor: Takashi NORO
  • Patent number: 9993813
    Abstract: A honeycomb structure includes a honeycomb structure body having a porous partition wall which cells and having a circumferential wall at an outer circumference thereof, and also includes a pair of electrodes on a side surface of the honeycomb structure body. An open frontal area of a center part is 0.70 to 0.95 times of that of an outer circumferential part, where the center part is defined as an area from a center of the honeycomb structure body to a position of 10% of a length from the center to the outer circumference in a direction toward the outer circumference in a cross-section orthogonal to the cells' extending direction, and the outer circumferential part is defined as an area from the outer circumference to a position of 10% of a length from the outer circumference to the center in a direction toward the center in the cross-section.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: June 12, 2018
    Assignee: NGK Insulators, Ltd.
    Inventors: Yoshimasa Omiya, Takashi Noro
  • Patent number: 9874132
    Abstract: There are disclosed an information-display-equipped electric-heating-type heater, and a method of using the above information. An information-display-equipped electric-heating-type heater includes a tubular honeycomb structure made of a conductive material and having porous partition walls to define and form a plurality of cells which become through channels for a fluid and extend from one end face to the other end face, and a circumferential wall positioned in an outermost circumference; and a pair of electrodes disposed on the circumferential wall of the honeycomb structure, and information concerning a heater performance of the electric-heating-type heater is displayed in the honeycomb structure.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: January 23, 2018
    Assignee: NGK Insulators, Ltd.
    Inventors: Yoshimasa Omiya, Takashi Noro, Kazumi Mase
  • Publication number: 20170276280
    Abstract: A joined body 10 includes a ceramic body 12, a metal member 14, and a joint portion 15 that joins the ceramic body 12 and the metal member 14 together. The joint portion 15 includes a first joint layer 16 joined to the ceramic body 12 and a second joint layer 18 joined to the metal member 14. The first joint layer 16 is disposed on the ceramic body 12 side and contains an alloy that contains Fe and Cr as main components, and a compound having a thermal expansion coefficient of 4.0×10?6 (/° C.) or lower is dispersed in the first joint layer 16. The second joint layer 18 is disposed on the metal member 14 side, contains an alloy that contains Fe and Cr as main components, and has a larger thermal expansion coefficient than the first joint layer 16.
    Type: Application
    Filed: March 22, 2017
    Publication date: September 28, 2017
    Applicant: NGK INSULATORS, LTD.
    Inventors: Yoshimasa KOBAYASHI, Kisuke YAMAMOTO, Yunie IZUMI, Takashi NORO
  • Patent number: 9516702
    Abstract: There is disclosed a honeycomb structure including a tubular honeycomb structure part having porous partition walls with which a plurality of cells are formed and an outer peripheral wall, and a pair of electrode parts arranged on a side surface of the honeycomb structure part, an electrical resistivity of the honeycomb structure part is from 10 to 200 ?cm, each of the pair of electrode parts is formed into a band-like shape extending in a direction in which the cells extend, in a cross section perpendicular to the extending direction of the cells, the one electrode part is disposed opposite to the other electrode part via the center of the honeycomb structure part, and the electrode part has portions having a thickness of 0 to 70% of the maximum thickness of the electrode part.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: December 6, 2016
    Assignee: NGK Insulators, Ltd.
    Inventors: Takashi Noro, Kazumi Nagareda, Tsuyoshi Watanabe, Shuhei Kuno, Tadato Ito
  • Publication number: 20160346776
    Abstract: A honeycomb structure includes a honeycomb structure body having a porous partition wall which cells and having a circumferential wall at an outer circumference thereof, and also includes a pair of electrodes on a side surface of the honeycomb structure body. An open frontal area of a center part is 0.70 to 0.95 times of that of an outer circumferential part, where the center part is defined as an area from a center of the honeycomb structure body to a position of 10% of a length from the center to the outer circumference in a direction toward the outer circumference in a cross-section orthogonal to the cells' extending direction, and the outer circumferential part is defined as an area from the outer circumference to a position of 10% of a length from the outer circumference to the center in a direction toward the center in the cross-section.
    Type: Application
    Filed: August 10, 2016
    Publication date: December 1, 2016
    Applicant: NGK INSULATORS, LTD.
    Inventors: Yoshimasa OMIYA, Takashi NORO
  • Patent number: 9409127
    Abstract: A honeycomb structure includes a tubular honeycomb structure body including porous partition walls defining a plurality of cells, and an outer peripheral wall and a pair of electrode parts disposed on a side face of the honeycomb structure body, wherein the honeycomb structure body has electric resistivity of 1 to 200 ?cm, each electrode part has a belt-like shape extending in an extending direction of the cells, each electrode part is placed on an opposite side each other across a center of the honeycomb structure body, the honeycomb structure body includes an inflow-side area that is an area on the inflow-side and covering the inflow end face, and an outflow-side area that is an area other than the inflow-side area, and the inflow-side area is made of a material having electric resistivity lower than electric resistivity of a material of the outflow-side area.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: August 9, 2016
    Assignee: NGK Insulators, Ltd.
    Inventors: Kazumi Mase, Yoshimasa Omiya, Atsushi Kaneda, Takashi Noro
  • Patent number: 9359929
    Abstract: A honeycomb structure includes a tubular honeycomb structure body having porous partition walls to define and form a plurality of cells and an outer peripheral wall, and a pair of electrodes disposed on a side surface of the honeycomb structure body. An electrical resistivity of the honeycomb structure body is from 1 to 200 ?cm, each of the pair of electrodes is formed into a band-like shape extending in an extending direction of the cells of the honeycomb structure body, one electrode in the pair of electrodes is disposed on a side opposite to the other electrode in the pair of electrodes via a center of the honeycomb structure body, the honeycomb structure body has a central region and an outer peripheral region, and an electrical resistivity of the central region is lower than an electrical resistivity of the outer peripheral region.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: June 7, 2016
    Assignee: NGK Insulators, Ltd.
    Inventors: Kazumi Mase, Yoshimasa Omiya, Atsushi Kaneda, Takashi Noro
  • Patent number: 9279356
    Abstract: A honeycomb structure includes a tubular honeycomb structure body having porous partition walls to define and form a plurality of cells and an outer peripheral wall, and a pair of electrodes disposed on a side surface of the honeycomb structure body. An electrical resistivity of the honeycomb structure body is from 1 to 200 ?cm, each of the pair of electrodes is formed into a band-like shape extending in an extending direction of the cells of the honeycomb structure body, one electrode in the pair of electrodes is disposed on a side opposite to the other electrode in the pair of electrodes via a center of the honeycomb structure body, the honeycomb structure body is constituted of an outer peripheral region and a central region, and an electrical resistivity of a material constituting the outer peripheral region is lower than an electrical resistivity of a material constituting the central region.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: March 8, 2016
    Assignee: NGK Insulators, Ltd.
    Inventors: Kazumi Mase, Yoshimasa Omiya, Atsushi Kaneda, Takashi Noro