Patents by Inventor Yukio Miyairi

Yukio Miyairi 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).

  • Exhaust gas purification filter
    Patent number: 9061942
    Abstract: An exhaust gas purification filter includes a honeycomb structure having porous ceramic partition walls separating and forming a plurality of cells functioning as exhaust gas passages and extending from one end portion to the other end portion, and plugging portions disposed in one side open end portions of predetermined cells and in the other side open end portions of the other cells. The partition walls have a thickness of 0.05 mm or more and 0.18 mm or less and an average pore size of 10 ?m or more and 18 ?m or less and the proportion of the volume of the pores having a size of twice the average pore size or more in the entire pore volume in a pore size distribution of the partition walls measured by mercury porosimetry is 5% or more and 40% or less.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: June 23, 2015
    Assignee: NGK Insulators, Ltd.
    Inventor: Yukio Miyairi
  • Honeycomb catalyst body
    Patent number: 9006138
    Abstract: There is provided a honeycomb catalyst body including, a honeycomb substrate, plugging portions, and a three way catalyst. All the cells are open in the inflow side end face, the honeycomb substrate has two regions of an inflow side region and an outflow side region, the inflow side region of the honeycomb substrate is a region from the inflow side end face to a position of 10 to 90% of a length in an central axial direction of the honeycomb substrate from the inflow side end face, and 100 to 400 g/L of the three way catalyst is loaded on the partition walls in the inflow side region, no catalyst is loaded on the partition walls in the outflow side region, and a ratio of the length to a diameter of the inflow side end face of the honeycomb substrate is 1.1 to 2.0.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: April 14, 2015
    Assignee: NGK Insulators, Ltd.
    Inventors: Chika Goto, Masataka Yamashita, Yukio Miyairi
  • WALL FLOW TYPE EXHAUST GAS PURIFICATION FILTER
    Publication number: 20140298779
    Abstract: A wall flow type exhaust gas purification filter includes a honeycomb structure body and plugging portions. Four inlet opening cells having a substantially hexagonal shape in cross section surround one outlet opening cell having a substantially square shape in cross section, where one side of an inlet opening cell and one side of the outlet opening cell have a substantially same length and are substantially parallel and adjacent to each other. Distance a between the partition wall defining a first side of the outlet opening cell and the partition wall defining an opposed second side is in a range of exceeding 0.8 mm and less than 2.4 mm, and distance b between the partition wall defining a third side of the inlet opening cell and the partition wall defining an opposed fourth side has a ratio to the distance a in a range exceeding 0.4 and less than 1.1.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 9, 2014
    Applicant: NGK Insulators, Ltd.
    Inventor: Yukio MIYAIRI
  • Honeycomb structure and honeycomb catalyst body
    Patent number: 8778825
    Abstract: Partition walls are provided with small pores and large pores, a porosity of the partition walls is from 50 to 70%, a porosity of the large pores of the partition walls is 30% or larger, a ratio of a total volume of the small pores to a total volume of the large pores is 20% or larger, and in a graph showing a pore diameter distribution of the partition walls, the pore diameter at a maximum peak value of the large pores is from 20 to 200 ?m, and the pore diameter at a maximum peak value of the small pores is from 0.1 to 8 ?m. Furthermore, a value obtained by dividing a porosity value (%) of the large pores by a thickness value (?m) of the partition walls is 0.2 or larger in a honeycomb structure.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: July 15, 2014
    Assignee: NGK Insulators, Ltd.
    Inventors: Shogo Hirose, Yukio Miyairi
  • FINE PARTICLE COLLECTING FILTER
    Publication number: 20140165520
    Abstract: A fine particle collecting filter includes a honeycomb structure in which a plurality of honeycomb segments are integrally joined by a joining material, and has a constitution where an exhaust gas allowed to flow from an inlet end surface into cells passes partition walls, and then flows out from an outlet end surface to the outsides of the cells. In the partition walls, SiC which is an aggregate is bound by Si which is a binding agent, at least one of an average open diameter of the pores of an inlet side of the exhaust gas passing the partition wall and an average open diameter of the pores of an outlet side is from 0.1 to 5 ?m, an average pore diameter of the whole partition wall is from 10 to 30 ?m, and a thermal conductivity of the partition walls at room temperature is from 50 to 80 W/mK.
    Type: Application
    Filed: December 12, 2013
    Publication date: June 19, 2014
    Applicant: NGK INSULATORS, LTD.
    Inventor: Yukio MIYAIRI
  • FINE PARTICLE COLLECTING FILTER
    Publication number: 20140165519
    Abstract: A fine particle collecting filter includes a honeycomb structure in which a plurality of honeycomb segments are integrally joined by a joining material, and has a constitution where an exhaust gas allowed to flow from an inlet end surface into cells passes partition walls, and then flows out from an outlet end surface to the outsides of the cells. The partition walls are made of a material containing SiC as a main component, at least one of an average open diameter of pores of an inlet side of the exhaust gas passing the partition wall and an average open diameter of the pores of an outlet side of the exhaust gas passing is from 0.1 to 5 ?m, an average pore diameter of the whole partition wall is from 10 to 30 ?m, and a thermal conductivity of the partition walls at room temperature is from 80 to 110 W/mK.
    Type: Application
    Filed: December 12, 2013
    Publication date: June 19, 2014
    Applicant: NGK INSULATORS, LTD.
    Inventor: Yukio MIYAIRI
  • Exhaust gas purification filter
    Patent number: 8734558
    Abstract: An exhaust gas purification filter 100 includes: a honeycomb structure 10 having partition walls 12, plugging portions 13, and a surface trapping layer 14 having an average pore size of 0.1 ?m or more and 5 ?m or less, a porosity of 50% or more and 80% or less, and a thickness of 1 ?m or more and 50 ?m or less. The partition walls 12 have a thickness of 0.05 mm or more and 0.18 mm or less and an average pore size of 10 or more and 18 ?m or less, and the proportion of the volume of the pores having a size of twice the average pore size or more in the entire pore volume in a pore size distribution of the partition walls 12 is 5% or more and 40% or less.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: May 27, 2014
    Assignee: NGK Insulators, Ltd.
    Inventor: Yukio Miyairi
  • Catalyst carrier
    Patent number: 8721978
    Abstract: Disclosed is a catalyst carrier which is used for carrying a catalyst thereon. The catalyst carrier is characterized in that the apparent specific heat measured at 800° C. is 1.8 times or more greater than that measured at room temperature, wherein the apparent specific heat means a charge heat amount required for substantially increasing the temperature of a unit mass (kg) by 1 K, inclusive of the influence of endotherm or exotherm caused by change in crystalline form, partial melting, coagulation, phase transformation, vitrification, amorphous-formation, crystallization and the like.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: May 13, 2014
    Assignee: NGK Insulators, Ltd.
    Inventor: Yukio Miyairi
  • HONEYCOMB FILTER
    Publication number: 20140116016
    Abstract: A honeycomb filter includes a honeycomb structure and plugged portions. Partition walls of the honeycomb structure are made of a partition wall material including a plurality of aggregates containing silicon carbide or silicon nitride as a main component, and a binding material at a content of 15 to 35 mass %. The binding material is made of a material in which mullite particles as reinforcing particles may be dispersed in cordierite. A thermal expansion coefficient of the partition walls at 40 to 800° C. is 4.2×10?6 1/K or less. When a value of a stress applied to the partition wall material at 900° C. is normalized by the maximum value of the stress applied to the partition wall material, a percentage of a plastic deformation displacement in a total displacement at a normalized stress value of 0.9 is in a range of 0.3 to 10%.
    Type: Application
    Filed: October 28, 2013
    Publication date: May 1, 2014
    Applicant: NGK INSULATORS, LTD.
    Inventors: Atsushi MIZUNO, Suguru KODAMA, Yasushi UCHIDA, Takahiro KONDO, Yukio MIYAIRI
  • Wall flow type exhaust gas purification filter
    Patent number: 8709349
    Abstract: There is provided a wall flow type exhaust gas purification filter is provided with a honeycomb structure having porous ceramic partition walls 12 and plugging portions disposed in one side opening end portions of predetermined cells and the other side opening end portions of the other cells. In the exhaust gas purification filter, when an average pore size is obtained for each region of ? mm×? mm in a range of 10 mm2 in an arbitrary cross section perpendicular to a surface of the partition walls 12, a large pore region having an average pore size of 15 ?m or more has an area of 0.1 mm2 or more, and a small pore region having an average pore size of 8 ?m or less has an area of 0.1 mm2 or more.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: April 29, 2014
    Assignee: NGK Insulators, Ltd.
    Inventor: Yukio Miyairi
  • HONEYCOMB FILTER
    Publication number: 20140093436
    Abstract: A honeycomb filter 100 includes honeycomb segments 4, plugging portions 5, and joining layers 7, area of outflow end surface 12 of honeycomb segment is larger than area of inflow end surface 11, and shape of cross section of honeycomb segment vertical to axial direction X has a similarity in axial direction X. Moreover, thickness of joining layer decreases in at least a part of joining layer in direction from inflow end surface side toward outflow end surface side, and length L2 of joining layer in axial direction X is smaller than 95% of length L1 of honeycomb segment in axial direction X. Furthermore, a region of honeycomb segments 4, 5 mm or more from outflow end surface 12 in axial direction X, is not provided with joining layers 7 which join side surfaces of honeycomb segments 4 to each other.
    Type: Application
    Filed: September 13, 2013
    Publication date: April 3, 2014
    Applicant: NGK INSULATORS, LTD.
    Inventors: Akifumi NISHIO, Takahiro KONDO, Yukio MIYAIRI
  • Honeycomb structure
    Patent number: 8663356
    Abstract: A honeycomb structure wherein the thickness of each partition wall is 50.8 ?m inclusive to 161.5 ?m exclusive, the cell density is 15.5 to 62.0 cells/cm2, the cell opening ratio of the honeycomb structure body is 76 to 91%, the porosity of the partition walls is 35 to 45%, the average pore diameter of the partition walls is 2 ?m inclusive to 10 ?m exclusive, the material for the partition walls includes at least one member selected from the group consisting of cordierite, aluminum titanate, silicon carbide, alumina and mullite, and the value obtained by dividing the average pore diameter of the partition walls by the thickness of the partition walls is larger than 0.04 but smaller than 0.065.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: March 4, 2014
    Assignee: NGK Insulators, Ltd.
    Inventors: Chika Goto, Masataka Yamashita, Yukio Miyairi
  • Honeycomb structure and honeycomb catalytic body
    Patent number: 8609581
    Abstract: A honeycomb structure includes: porous partition walls having a large number of pores and disposed to form a plurality of cells communicating between two end faces, and plugged portions disposed to plug each of the cells on one of the end faces. A percentage of the number of carbon particulates contained in combustion exhaust gas satisfying the following condition (1) and passing through a honeycomb structure is 80% or more at a space velocity of 25000/h. The condition (1) is that the carbon particulates has a mean diameter of 0.07 to 0.2 ?m, a ratio of the carbon particulates having a diameter of 1 ?m or more is 0.1% or less in number and that a concentration of the carbon particulates is 10 mg/m3. The honeycomb structure is excellent in purification efficiency, has low pressure loss, and is mountable even in a limited space.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: December 17, 2013
    Assignee: NGK Insulators, Ltd.
    Inventor: Yukio Miyairi
  • Honeycomb catalyst body
    Patent number: 8603942
    Abstract: There is provided a honeycomb catalyst body comprising a honeycomb base body having porous partition walls forming a plurality of divided cells which extend from one end face of honeycomb base body to its other end face and which function as a fluid passage, and an outer wall present at the outermost peripheral portion of honeycomb base body, plugged portions provided so as to plug part of the plurality of divided cells, and a catalyst loaded on the partition walls of honeycomb base body. The plurality of divided cells include outermost peripheral cells formed by the partition walls and the outer wall, and of the outermost peripheral cells, those cells whose hydraulic diameter is 5 to 75% of the hydraulic diameter of a cell other than the outermost peripheral cells, are through-cells having no plugged portion.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: December 10, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Chika Goto, Masataka Yamashita, Toshio Yamada, Yukio Miyairi
  • HONEYCOMB STRUCTURE, HONEYCOMB CATALYST BODY USING THE SAME, AND MANUFACTURING METHOD OF HONEYCOMB STRUCTURE
    Publication number: 20130243999
    Abstract: A honeycomb structure including porous partition walls, a porosity of the partition walls is from 45 to 70%, and when pores having the maximum width in excess of 10 ?m in a cross section of each of the partition walls are large pores and the partition wall is equally divided into three regions of a center region and surface layer regions present on both sides of the center region, a total area of cross sections of the large pores which appear in the surface layer regions is from 60 to 100% of a total area of cross sections of all the pores which appear in the surface layer regions, and a total area of cross sections of the large pores which appear in the center region is from 0 to 40% of the total area of cross sections of all the pores which appear in the center region.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 19, 2013
    Applicant: NGK INSULATORS, LTD.
    Inventors: Shogo HIROSE, Yukio MIYAIRI
  • HONEYCOMB STRUCTURE AND HONEYCOMB CATALYST
    Publication number: 20130236687
    Abstract: There is disclosed a honeycomb structure usable as a support of a honeycomb catalyst onto which a large amount of catalyst can be loaded and which has a good purification efficiency, and the honeycomb structure includes porous partition walls 5 defining a plurality of cells to form through channels of a fluid and having a plurality of pores 10 therein, wherein a porosity of the partition walls 5 is from 45 to 70%, and in a cross section perpendicular to an extending direction of the cells, a total area of macro pores 12 having the largest pore diameter of larger than 10 ?m is 50% or more with respect to a total area of the pores 10.
    Type: Application
    Filed: March 5, 2013
    Publication date: September 12, 2013
    Applicant: NGK INSULATORS, LTD.
    Inventors: Shogo HIROSE, Yukio MIYAIRI
  • Honeycomb filter
    Patent number: 8496883
    Abstract: A honeycomb filter includes a cell having one open end and another closed end that serves as a fluid flow path and a cell having one closed end and another open end, wherein the cells are alternately disposed. The honeycomb filter includes an undeposited region in an upstream region of a partition portion, which has no trapping layer and has a length of 5% or more and 30% or less of the length of the inlet cell. The upstream region of the partition portion includes an undeposited region having an area of 10% or more of that of the cell in a cross-section perpendicular to the exhaust gas flow direction. The undeposited region with no trapping layer in the upstream region decreases the permeation resistance of the partition portion in the upstream region and facilitates fluid passage through the partition portion in the upstream region.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: July 30, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Takashi Mizutani, Koji Nagata, Yukio Miyairi
  • Honeycomb filter and method for producing honeycomb filter
    Patent number: 8470254
    Abstract: There is provided a honeycomb filter wherein particles having an average particle diameter smaller that of the particles constituting partition walls are deposited at least in open pores formed by the particles constituting the partition walls and/or gaps between the particles in a surface layer portion of the partition walls on the exhaust gas inflow side, thereby forming a composite region. The average pore diameter of the partition walls is 5 to 40 ?m, and the porosity of the partition wall is 35 to 75%. The particles to be deposited have an average particle diameter of 1 to 15 ?m, and the height of the composite region is not more than 80 ?m in the direction from the outermost contour line of the partition walls to the surface of the partition walls.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: June 25, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Takashi Mizutani, Shingo Iwasaki, Yukio Miyairi
  • Honeycomb filter and method for producing honeycomb filter
    Patent number: 8470255
    Abstract: There is provided a honeycomb filter wherein particles having an average particle diameter smaller than the average pore diameter of partition walls are deposited at least in open pores formed in the surface layer of the partition wall and in the pores of the partition wall in a surface layer portion of the partition walls on the exhaust gas inflow side, thereby forming a composite region. The average pore diameter of the partition walls is 5 to 40 ?m, and the porosity of the partition wall is 35 to 75%. The particles to be deposited have an average particle diameter of 1 to 15 ?m, and the height of the composite region is not more than 80 ?m in the direction from the outermost contour line of the partition walls to the surface of the partition walls.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: June 25, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Takashi Mizutani, Shingo Iwasaki, Yukio Miyairi
  • Honeycomb filter
    Patent number: 8444739
    Abstract: A honeycomb filter including partition walls having a porous partition wall base material and a surface layer provided on only inflow side or both inflow and outflow sides of the partition wall base material, and satisfying the following conditions capable of using as a DPF. The surface layer has a peak pore diameter of from 0.3 ?m to 20 ?m (exclusive) being equal to or smaller than the average pore diameter of the base material; the porosity of from 60% to 95% (exclusive) when measured by mercury porosimetry being larger than that of the base material; and the thickness L1 of from 0.5% to 30% (exclusive) of the partition wall thickness L2; and mass per filtration area of from 0.01 mg/cm2 to 6 mg/cm2 (exclusive). The base material has an average pore diameter of from 10 ?m to 60 ?m (exclusive) and a porosity of from 40% to 65% (exclusive).
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: May 21, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukio Mizuno, Naomi Noda, Toshio Yamada, Yukio Miyairi, Yukari Nakane, Yasushi Noguchi