Patents by Inventor Fumihiko YOSHIOKA

Fumihiko YOSHIOKA 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).

  • Publication number: 20200306740
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls provided, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face, and porous plugging portions provided either at the ends on the inflow end face or the outflow end face of the cells, wherein the plugging portions are composed of a porous material, the honeycomb structure has a central region and a circumferential region, and a ratio of an area of the circumferential region with respect to that of the central region ranges from 0.1 to 0.5, a plugging length L1 in the cell extending direction of a central plugging portion in the central region is larger than a plugging length L2 of a circumferential plugging portion in the circumferential region, L1 ranges from 7 to 9 mm, and L2 from 3 to 6 mm.
    Type: Application
    Filed: March 11, 2020
    Publication date: October 1, 2020
    Applicant: NGK Insulators, Ltd.
    Inventor: Fumihiko Yoshioka
  • Publication number: 20200306681
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls provided, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face, and porous plugging portions provided either at the ends on the inflow end face side or the outflow end face side of the cells, wherein the plugging portions are composed of a porous material, the honeycomb structure has a central region and a circumferential region, and a ratio of an area of the circumferential region with respect to that of the central region ranges from 0.1 to 0.5, porosity of a central plugging portion in the central region, is higher than that of a circumferential plugging portion in the circumferential region, and the porosity of the central plugging portion ranges from 76% to 85%, and that of the circumferential plugging portion from 60% to 75%.
    Type: Application
    Filed: March 11, 2020
    Publication date: October 1, 2020
    Applicant: NGK Insulators, Ltd.
    Inventor: Fumihiko YOSHIOKA
  • Publication number: 20200306739
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls provided, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face, and porous plugging portions provided either at the ends on the inflow end face or the outflow end face of the cells, wherein the plugging portions are composed of a porous material, the honeycomb structure has a central region and a circumferential region and a ratio of an area of the circumferential region with respect to that of the central region ranges from 0.1 to 0.5, and a plugging length L1 in the cell extending direction of a central plugging portion in the central region is smaller than a plugging length L2 of a circumferential plugging portion in the circumferential region, L1 ranges from 3 to 6 mm, and L2 from 7 to 9 mm.
    Type: Application
    Filed: March 11, 2020
    Publication date: October 1, 2020
    Applicant: NGK Insulators, Ltd.
    Inventor: Fumihiko YOSHIOKA
  • Publication number: 20200306680
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls placed, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face; and porous plugging portions provided either at the ends on the inflow end face side of the cells or at the ends on the outflow end face side of the cells, wherein the plugging portions include plugging portions that have voids therein, and in the plugging portions having the voids, porosity including the voids as pores ranges from 68% to 83%.
    Type: Application
    Filed: March 11, 2020
    Publication date: October 1, 2020
    Applicant: NGK Insulators, Ltd.
    Inventors: Kimiko KISHINE, Fumihiko YOSHIOKA
  • Publication number: 20200306738
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls provided, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face, and a porous plugging portion provided either at an end on the inflow end face or the outflow end face of the cells, wherein the plugging portion is composed of a porous material, the honeycomb structure has a central region and a circumferential region, and a ratio of an area of the circumferential region with respect to that of the central region ranges from 0.1 to 0.5, porosity of a central plugging portion in the central region is lower than that of a circumferential plugging portion in the circumferential region, and the porosity of the central plugging portions ranges from 60% to 68%, and that of the circumferential plugging portions ranges from 70% to 85%.
    Type: Application
    Filed: March 11, 2020
    Publication date: October 1, 2020
    Applicant: NGK Insulators, Ltd.
    Inventor: Fumihiko YOSHIOKA
  • Patent number: 10669906
    Abstract: A honeycomb filter, including: a honeycomb structure, wherein the honeycomb structure further includes a platinum group element-containing catalyst layer, the platinum group element-containing catalyst layer is disposed only on a side of an inner surface of the partition walls surrounding the inflow cells, and the platinum group element-containing catalyst layer is disposed in a range of at least up to 35% with respect to an overall length of the cells starting from the inflow end face and is not disposed in a range of at least up to 30% with respect to the overall length of the cells starting from the outflow end face, in an extending direction of the cells of the honeycomb structure.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: June 2, 2020
    Assignees: NGK Insulators, Ltd., Honda Motor Co., Ltd.
    Inventors: Fumihiko Yoshioka, Yoshiaki Hatakeyama, Noritaka Masumitsu
  • Patent number: 10557390
    Abstract: A honeycomb filter, including: a honeycomb structure, wherein the honeycomb structure further includes a platinum group element-containing catalyst layer and a trapping layer, the platinum group element-containing catalyst layer is disposed at least on an entire surface of a side of an inner surface of the partition walls surrounding either one of the inflow cells or the outflow cells, the trapping layer does not contain a platinum group element, and the trapping layer is disposed in a range of at least up to 50% with respect to an overall length of the honeycomb structure starting from the outflow end face and is not disposed in a range of at least up to 40% with respect to the overall length starting from the inflow end face, in an extending direction of the cells of the honeycomb structure.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: February 11, 2020
    Assignees: NGK Insulators, Ltd., Honda Motor Co., Ltd.
    Inventors: Fumihiko Yoshioka, Norihiro Wakida, Yoshiaki Hatakeyama, Noritaka Masumitsu
  • Patent number: 10525394
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb substrate including a porous partition wall that defines a plurality of cells extending from an inflow end face to an outflow end face, an inflow side plugging portion disposed at the inflow end face of the honeycomb substrate to plug open ends of outflow cells and an outflow side plugging portion disposed at the outflow end face of the honeycomb substrate to plug open ends of inflow cells other than the outflow cells. The honeycomb substrate includes the partition wall that defines two of the inflow cells by division. An average of the plugging length LIN of the inflow side plugging portions disposed in the outflow cells of the honeycomb substrate is larger than an average of the plugging length LOUT of the outflow side plugging portions disposed in the inflow cells of the honeycomb substrate.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: January 7, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Fumihiko Yoshioka, Kazuto Miura
  • Patent number: 10478766
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb substrate including a porous partition wall that defines a plurality of cells extending from an inflow end face to an outflow end face, an inflow side plugging portion disposed at the inflow end face of the honeycomb substrate to plug open ends of outflow cells; and an outflow side plugging portion disposed at the outflow end face of the honeycomb substrate to plug open ends of inflow cells other than the outflow cells. The honeycomb substrate includes the partition wall that defines two of the inflow cells by division. An average of the plugging length LOUT of the outflow side plugging portions disposed in the inflow cells of the honeycomb substrate is larger than an average of the plugging length LIN of the inflow side plugging portions disposed in the outflow cells of the honeycomb substrate.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: November 19, 2019
    Assignee: NGK Insulators, Ltd.
    Inventors: Fumihiko Yoshioka, Kazuto Miura
  • Publication number: 20190301328
    Abstract: A honeycomb filter, including: a honeycomb structure, wherein the honeycomb structure further includes a platinum group element-containing catalyst layer and a trapping layer, the platinum group element-containing catalyst layer is disposed at least on an entire surface of a side of an inner surface of the partition walls surrounding either one of the inflow cells or the outflow cells, the trapping layer does not contain a platinum group element, and the trapping layer is disposed in a range of at least up to 50% with respect to an overall length of the honeycomb structure starting from the outflow end face and is not disposed in a range of at least up to 40% with respect to the overall length starting from the inflow end face, in an extending direction of the cells of the honeycomb structure.
    Type: Application
    Filed: March 18, 2019
    Publication date: October 3, 2019
    Applicants: NGK Insulators, Ltd., Honda Motor Co., Ltd.
    Inventors: Fumihiko Yoshioka, Norihiro Wakida, Yoshiaki Hatakeyama, Noritaka Masumitsu
  • Publication number: 20190301325
    Abstract: A honeycomb filter, including: a honeycomb structure, wherein the honeycomb structure includes a platinum group element-containing catalyst layer, the platinum group element-containing catalyst layer is disposed only on a side of an inner surface of the partition walls surrounding the inflow cells, and the platinum group element-containing catalyst layer is disposed in a range of at least up to 40% with respect to an overall length of the cells starting from the outflow end face and is not disposed in a range of at least up to 30% with respect to the overall length of the cells starting from the inflow end face, in an extending direction of the cells of the honeycomb structure.
    Type: Application
    Filed: March 18, 2019
    Publication date: October 3, 2019
    Applicants: NGK Insulators, Ltd, Honda Motor Co., ltd.
    Inventors: Fumihiko YOSHIOKA, Yoshiaki HATEKAYAMA, Noritaka MASUMITSU
  • Publication number: 20190299147
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall surrounding cells each of which has one end plugged by a plugging portion. An open frontal area O (%) of the cells in the honeycomb structure body is 75 to 80%, a porosity P (%) of the partition wall measured by a mercury press-in method is 52 to 58%, an average pore diameter D (?m) of the partition wall measured by the mercury press-in method is 6 to 12 ?m, and a pore volume rate A (%) of pores whose pore diameters are not less than 20 ?m with respect to an overall pore volume of the partition wall is not more than 13.5%.
    Type: Application
    Filed: March 11, 2019
    Publication date: October 3, 2019
    Applicant: NGK Insulators, Ltd.
    Inventor: Fumihiko Yoshioka
  • Publication number: 20190301326
    Abstract: A honeycomb filter, including: a honeycomb structure, wherein the honeycomb structure includes a platinum group element-containing catalyst layer, the platinum group element-containing catalyst layer is disposed only on a side of an inner surface of the partition walls surrounding the outflow cells, and the platinum group element-containing catalyst layer is disposed in a range of at least up to 35% with respect to an overall length of the cells starting from the outflow end face and is not disposed in a range of at least up to 30% with respect to the overall length of the cells starting from the inflow end face, in an extending direction of the cells of the honeycomb structure.
    Type: Application
    Filed: March 18, 2019
    Publication date: October 3, 2019
    Applicants: NGK Insulators, Ltd., Honda Motor Co., Ltd.
    Inventors: Fumihiko YOSHIOKA, Yoshiaki HATEKAYAMA, Noritaka MASUMITSU
  • Publication number: 20190301327
    Abstract: A honeycomb filter, including: a honeycomb structure, wherein the honeycomb structure further includes a platinum group element-containing catalyst layer, the platinum group element-containing catalyst layer is disposed only on a side of an inner surface of the partition walls surrounding the inflow cells, and the platinum group element-containing catalyst layer is disposed in a range of at least up to 35% with respect to an overall length of the cells starting from the inflow end face and is not disposed in a range of at least up to 30% with respect to the overall length of the cells starting from the outflow end face, in an extending direction of the cells of the honeycomb structure.
    Type: Application
    Filed: March 18, 2019
    Publication date: October 3, 2019
    Applicants: NGK Insulators, Ltd., Honda Motor Co., Ltd.
    Inventors: Fumihiko YOSHIOKA, Yoshiaki HATEKAYAMA, Noritaka MASUMITSU
  • Publication number: 20170274311
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb substrate including a porous partition wall that defines a plurality of cells extending from an inflow end face to an outflow end face, an inflow side plugging portion disposed at the inflow end face of the honeycomb substrate to plug open ends of outflow cells; and an outflow side plugging portion disposed at the outflow end face of the honeycomb substrate to plug open ends of inflow cells other than the outflow cells. The honeycomb substrate includes the partition wall that defines two of the inflow cells by division. An average of the plugging length LOUT of the outflow side plugging portions disposed in the inflow cells of the honeycomb substrate is larger than an average of the plugging length LIN of the inflow side plugging portions disposed in the outflow cells of the honeycomb substrate.
    Type: Application
    Filed: March 10, 2017
    Publication date: September 28, 2017
    Applicant: NGK INSULATORS, LTD.
    Inventors: Fumihiko YOSHIOKA, Kazuto MIURA
  • Publication number: 20170274312
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb substrate including a porous partition wall that defines a plurality of cells extending from an inflow end face to an outflow end face, an inflow side plugging portion disposed at the inflow end face of the honeycomb substrate to plug open ends of outflow cells and an outflow side plugging portion disposed at the outflow end face of the honeycomb substrate to plug open ends of inflow cells other than the outflow cells. The honeycomb substrate includes the partition wall that defines two of the inflow cells by division. An average of the plugging length LIN of the inflow side plugging portions disposed in the outflow cells of the honeycomb substrate is larger than an average of the plugging length LOUT of the outflow side plugging portions disposed in the inflow cells of the honeycomb substrate.
    Type: Application
    Filed: March 10, 2017
    Publication date: September 28, 2017
    Applicant: NGK INSULATORS, LTD.
    Inventors: Fumihiko YOSHIOKA, Kazuto MIURA