Patents by Inventor Tadato Ito

Tadato Ito 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: 10918988
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb substrate and a plugging portion provided at an end portion on either an inflow or outflow end face side of cells, wherein, in a section orthogonal to the cell extending direction, the shapes of an inflow cell having the plugging portion and an outflow cell having the plugging portion are hexagonal. In the plurality of cells, a plurality of inflow cells surround one outflow cell such that one side of the inflow cell and one side of the outflow cell adjacent to the inflow cell are parallel. The partition wall includes a first partition wall and a second partition wall, at least one of the first partition walls is configured such that a ratio of a thickness of the second partition wall to the first partition wall is 1.0 to 2.5, and a total open frontal area is 35% to 95%.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: February 16, 2021
    Assignee: NGK Insulators, Ltd.
    Inventors: Tetsuya Makino, Makoto Teranishi, Tadato Ito, Etsuji Ohara
  • Publication number: 20200101410
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb substrate and a plugging portion provided at an end portion on either an inflow or outflow end face side of cells, wherein, in a section orthogonal to the cell extending direction, the shapes of an inflow cell having the plugging portion and an outflow cell having the plugging portion are hexagonal. In the plurality of cells, a plurality of inflow cells surround one outflow cell such that one side of the inflow cell and one side of the outflow cell adjacent to the inflow cell are parallel. The partition wall includes a first partition wall and a second partition wall, at least one of the first partition walls is configured such that a ratio of a thickness of the second partition wall to the first partition wall is 1.0 to 2.5, and a total open frontal area is 35% to 95%.
    Type: Application
    Filed: September 12, 2019
    Publication date: April 2, 2020
    Applicant: NGK Insulators, Ltd.
    Inventors: Tetsuya MAKINO, Makoto TERANISHI, Tadato ITO, Etsuji OHARA
  • Patent number: 9585196
    Abstract: 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 1 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 a total of heat capacities of the pair of electrode parts is from 2 to 150% of a heat capacity of the whole outer peripheral wall.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: February 28, 2017
    Assignee: NGK Insulators, Ltd.
    Inventors: Yoshiyuki Kasai, Atsushi Kaneda, Yusuke Hosoi, Yoshimasa Omiya, Tadato Ito
  • Patent number: 9532402
    Abstract: A honeycomb structure including: a tubular honeycomb structure part having porous partition walls 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 1 to 200 ?cm, each of the pair of electrode parts is formed into a band-like shape, the one electrode part is disposed opposite to the other electrode part via the center of the honeycomb structure part, and a distance from one end portion in the extending direction of the cells to an end portion of the electrode part which faces the one end portion of the honeycomb structure part in the extending direction of the cells is from 1 to 10% of a length of the honeycomb structure part in the extending direction of the cells.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: December 27, 2016
    Assignee: NGK Insulators, Ltd.
    Inventors: Yoshiyuki Kasai, Yoshimasa Omiya, Tadato Ito
  • 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
  • Patent number: 9421495
    Abstract: To provide a catalytic converter that reduces non-uniformity of temperature of a catalyst support and that can approach a uniform temperature distribution, and a structural body for supporting a catalyst that structures this catalytic converter. At a catalyst support, gradually decreasing width portions, at which a width thereof gradually decreases toward electrode centers, are formed at regions where electrodes, are contactingly disposed, as seen in a cross-section orthogonal to a direction in which exhaust flows. The width is shorter than a length of a center line at a given position. Heat generation and heat dissipation of the catalyst support are balanced overall.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: August 23, 2016
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, NGK INSULATORS, LTD.
    Inventors: Keita Hashimoto, Masaru Kakinohana, Takeo Kobayashi, Tsuyoshi Watanabe, Yoshiyuki Kasai, Tadato Ito
  • Publication number: 20140004014
    Abstract: To provide a catalytic converter that reduces non-uniformity of temperature of a catalyst support and that can approach a uniform temperature distribution, and a structural body for supporting a catalyst that structures this catalytic converter. At a catalyst support, gradually decreasing width portions, at which a width thereof gradually decreases toward electrode centers, are formed at regions where electrodes, are contactingly disposed, as seen in a cross-section orthogonal to a direction in which exhaust flows. The width is shorter than a length of a center line at a given position. Heat generation and heat dissipation of the catalyst support are balanced overall.
    Type: Application
    Filed: March 12, 2012
    Publication date: January 2, 2014
    Applicants: NGK INSULATORS, LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keita Hashimoto, Masaru Kakinohana, Takeo Kobayashi, Tsuyoshi Watanabe, Yoshiyuki Kasai, Tadato Ito
  • Publication number: 20130284720
    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 1 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 a total of heat capacities of the pair of electrode parts is from 2 to 150% of a heat capacity of the whole outer peripheral wall.
    Type: Application
    Filed: June 21, 2013
    Publication date: October 31, 2013
    Inventors: Yoshiyuki KASAI, Atsushi KANEDA, Yusuke HOSOI, Yoshimasa OMIYA, Tadato ITO
  • Publication number: 20130284719
    Abstract: There is disclosed a honeycomb structure including: a tubular honeycomb structure part having porous partition walls 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 1 to 200 ?cm, each of the pair of electrode parts is formed into a band-like shape, the one electrode part is disposed opposite to the other electrode part via the center of the honeycomb structure part, and a distance from one end portion in the extending direction of the cells to an end portion of the electrode part which faces the one end portion of the honeycomb structure part in the extending direction of the cells is from 1 to 10% of a length of the honeycomb structure part in the extending direction of the cells.
    Type: Application
    Filed: June 21, 2013
    Publication date: October 31, 2013
    Inventors: Yoshiyuki KASAI, Yoshimasa OMIYA, Tadato ITO
  • Publication number: 20130277360
    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: Application
    Filed: June 20, 2013
    Publication date: October 24, 2013
    Inventors: Takashi NORO, Kazumi NAGAREDA, Tsuyoshi WATANABE, Shuhei KUNO, Tadato ITO
  • Patent number: 7384441
    Abstract: There is provided a honeycomb filter obtained by bonding, into one piece, a plurality of honeycomb segments comprising partition walls having filtering function, and a number of through-holes divided from each other by the partition walls and extending in an axial direction. Predetermined through-holes are plugged at one end face of the filter, and the remaining through-holes are plugged at the other end face of the filter. The honeycomb filter is characterized in that the honeycomb segment disposed in a peripheral portion of the honeycomb filter has a lower average bulk density than that of the honeycomb segment disposed in a central portion.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: June 10, 2008
    Assignee: NGK Insulators, Ltd.
    Inventors: Tadato Ito, Shigeharu Hashimoto
  • Patent number: 7138002
    Abstract: There is provided a honeycomb structure in which the structure is not segmented, or a smaller number of segments are integrated to suppress a local temperature rise and to reduce breakage by thermal stress at the time of use, and a method of manufacturing the structure. There is disclosed a honeycomb structure 1 comprising: a large number of cells 3 partitioned by cell walls 2 and extending through an axial direction. A flow channel separator 6 is formed in the honeycomb structure 1. There is disclosed a method of manufacturing the honeycomb structure 1 in which the flow channel separator 6 is formed by extrusion. There is disclosed a method of manufacturing the honeycomb structure 1 in which the flow channel separator 6 is formed by clogging.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: November 21, 2006
    Assignee: NGK Insulators, Ltd.
    Inventors: Toshiyuki Hamanaka, Tadato Ito
  • Patent number: 7073327
    Abstract: There are disclosed an exhaust emission control system including an internal combustion engine, a filter, and an exhaust pipe, a method of manufacturing a filter suitable for the system, and a method of calculating a pressure loss. The system comprises combustion means for intermittently burning particulate matters arrested by the filter, the filter includes porous partition walls extending from one end face to the other end face thereof, and a large number of through channels partitioned by the partition walls, predetermined through channels are sealed at either of the end faces, and assuming that a partition wall thickness is (X) ?m, and the number of through channels per unit area in a cross section vertical to a longitudinal direction of the through channels is (Y) cells/cm2, X and Y come within a range surrounded by straight lines connecting points A1, B1, C1, and D1 in this order in FIG. 1 in the exhaust emission control system.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: July 11, 2006
    Assignee: NGK Insulators, Ltd.
    Inventors: Shigeharu Hashimoto, Yukio Miyairi, Tadato Ito
  • Patent number: 7037567
    Abstract: A honeycomb structure includes a plurality of honeycomb segments each having a number of throughholes divided from each other by partition walls and extending in the axial direction of honeycomb segment, wherein the honeycomb segments are bonded at their surfaces parallel to the axial direction to form an integrated body, such that the honeycomb segments comprise those honeycomb segments in which the outer portion 6 has a larger per-unit-volume heat capacity than the central portion does.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: May 2, 2006
    Assignee: NGK Insulators, Ltd.
    Inventors: Shigeharu Hashimoto, Tadato Ito
  • Publication number: 20050138921
    Abstract: There are disclosed an exhaust emission control system including an internal combustion engine, a filter, and an exhaust pipe, a method of manufacturing a filter suitable for the system, and a method of calculating a pressure loss. The system comprises combustion means for intermittently burning particulate matters arrested by the filter, the filter includes porous partition walls extending from one end face to the other end face thereof, and a large number of through channels partitioned by the partition walls, predetermined through channels are sealed at either of the end faces, and assuming that a partition wall thickness is (X) ?m, and the number of through channels per unit area in a cross section vertical to a longitudinal direction of the through channels is (Y) cells/cm2, X and Y come within a range surrounded by straight lines connecting points A1, B1, C1, and D1 in this order in FIG. 1 in the exhaust emission control system.
    Type: Application
    Filed: February 28, 2003
    Publication date: June 30, 2005
    Applicant: NGK INSULATORS, LTD.
    Inventors: Shigeharu Hashimoto, Yukio Miyairi, Tadato Ito
  • Publication number: 20050126140
    Abstract: There is provided a honeycomb filter obtained by bonding, into one piece, a plurality of honeycomb segments comprising partition walls having filtering function, and a number of through-holes divided from each other by the partition walls and extending in an axial direction. Predetermined through-holes are plugged at one end face of the filter, and the remaining through-holes are plugged at the other end face of the filter. The honeycomb filter is characterized in that the honeycomb segment disposed in a peripheral portion of the honeycomb filter has a lower average bulk density than that of the honeycomb segment disposed in a central portion.
    Type: Application
    Filed: March 19, 2003
    Publication date: June 16, 2005
    Applicant: Ngk Insulators, Ltd.
    Inventors: Tadato Ito, Shigeharu Hashimoto
  • Publication number: 20040211164
    Abstract: There is provided a honeycomb structure in which the structure is not segmented, or a smaller number of segments are integrated to suppress a local temperature rise and to reduce breakage by thermal stress at the time of use, and a method of manufacturing the structure. There is disclosed a honeycomb structure 1 comprising: a large number of cells 3 partitioned by cell walls 2 and extending through an axial direction. A flow channel separator 6 is formed in the honeycomb structure 1. There is disclosed a method of manufacturing the honeycomb structure 1 in which the flow channel separator 6 is formed by extrusion. There is disclosed a method of manufacturing the honeycomb structure 1 in which the flow channel separator 6 is formed by clogging.
    Type: Application
    Filed: January 21, 2004
    Publication date: October 28, 2004
    Inventors: Toshiyuki Hamanaka, Tadato Ito
  • Publication number: 20040142145
    Abstract: There is provided a honeycomb structure which hardly generates cracks caused by the thermal stress appearing therein during the use and which is superior in durability.
    Type: Application
    Filed: December 8, 2003
    Publication date: July 22, 2004
    Inventors: Shigeharu Hashimoto, Tadato Ito
  • Patent number: 6031213
    Abstract: An electrode structure includes: a metallic electrode; a case for accommodating and holding the electrode, and one end of a lead wire connecting to the electrode; and an insulating member interposed between the electrode and the case in order to ensure insulation between the electrode and the case, in which structure a waterproof member is interposed between the case and the lead wire in order to prevent the incoming of water from between the case and the lead wire, and an electric heater havinging the above electrode structure.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: February 29, 2000
    Assignees: NGK Insulators, Ltd., Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Shigeharu Hashimoto, Tadato Ito, Yuichi Shimasaki, Hiroaki Kato, Takashi Komatsuda, Akihisa Saito, Takuya Aoki, Tetsu Teshirogi
  • Patent number: 5935473
    Abstract: An electrode structure includes a metallic electrode having a configuration of a bending cylinder and having a plurality of members disposed successively in an axial direction of the electrode and mutually connected with adjacent member(s); a case for installing the metallic electrode and one end of a lead wire for electrification therein; and an insulating member which is positioned between the case and the electrode and which the case from the electrode. An electric heater includes a housing, a honeycomb structure installed in the housing, and the electrode structure for electrifying the honeycomb structure. The electrode structure exhibits excellent composability, waterproof ability, and gas sealability.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: August 10, 1999
    Assignee: NGK Insulators, Ltd.
    Inventors: Shigeharu Hashimoto, Makoto Miyazaki, Tadato Ito, Hironori Ohkawa