Patents by Inventor Takayoshi Yamauchi

Takayoshi Yamauchi 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: 11761487
    Abstract: A sliding member for a thrust bearing is provided. A sliding layer includes fibrous particles dispersed in a synthetic resin, and has a sliding surface side region and an interface side region. The particles have an average particle size Dsur, first and Dsur, second respectively in first and second cross-sections in the sliding surface side region, and Dint, first and Dint, second respectively in first and second cross-sections in the interface side region. Dsur, first and Dint, second are 5-30 ?m, and Dsur, second and Dint, first are 5 to 20% of respectively Dsur, first and Dint, second. A dispersion index of the particles having the major axis length of 20 ?m or longer is 5 or more, both in the sliding surface side region in view of the first cross-section and in the interface side region in view of the second cross-section.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: September 19, 2023
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Takayoshi Yamauchi
  • Patent number: 11236780
    Abstract: A sliding member includes a back-metal layer and a sliding layer on the back-metal layer, and the sliding layer has a sliding surface. The sliding layer includes a synthetic resin and fibrous particles dispersed in the synthetic resin. A volume ratio of the fibrous particles in the sliding layer is 1 to 15%, and the fibrous particles are made of semi-graphite having a nano indenter hardness of 1000 to 5000 MPa. An average aspect ratio of the fibrous particles is not less than 5, where an aspect ratio is defined as a ratio of a major axis to a minor axis of the fibrous particle viewed from the sliding surface. An average grain size of the fibrous particles in cross-sectional view perpendicular to the sliding surface is 5 to 50 ?m.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: February 1, 2022
    Assignee: DAIDO METAL COMPANY LTD.
    Inventors: Yoshifumi Ito, Yu Suzuki, Takayoshi Yamauchi
  • Patent number: 11199223
    Abstract: A sliding member for a journal bearing is provided. A sliding layer includes fibrous particles dispersed in a synthetic resin, and has a sliding surface side region and an interface side region. The particles have an average particle size Dsur, axi and Dsur, cir respectively in an axial and circumferential cross-section in the sliding surface side region, and Dint, axi and Dint, cir respectively in axial and circumferential cross-sections in the interface side region. Dsur, axi and Dint, cir are 5-30 ?m, and Dsur, cir and Dint, axi are 5 to 20% of respectively Dsur, axi and Dint, cir. A dispersion index of the particles having the major axis length of 20 ?m or longer is 5 or more, both in the sliding surface side region in view of the axial cross-section and in the interface side region in view of the circumferential cross-section.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: December 14, 2021
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Takayoshi Yamauchi
  • Publication number: 20210140475
    Abstract: A sliding member includes a back-metal layer and a sliding layer on the back-metal layer, and the sliding layer has a sliding surface. The sliding layer includes a synthetic resin and fibrous particles dispersed in the synthetic resin. A volume ratio of the fibrous particles in the sliding layer is 1 to 15%, and the fibrous particles are made of semi-graphite having a nano indenter hardness of 1000 to 5000 MPa. An average aspect ratio of the fibrous particles is not less than 5, where an aspect ratio is defined as a ratio of a major axis to a minor axis of the fibrous particle viewed from the sliding surface. An average grain size of the fibrous particles in cross-sectional view perpendicular to the sliding surface is 5 to 50 ?m.
    Type: Application
    Filed: November 2, 2020
    Publication date: May 13, 2021
    Inventors: Yoshifumi Ito, Yu Suzuki, Takayoshi Yamauchi
  • Patent number: 10995296
    Abstract: A sliding member includes a back metal layer and a sliding layer on the back metal layer. The sliding layer includes a synthetic resin matrix and graphite particles dispersed in the matrix in a volume ratio of 5-50% of that of the sliding layer. The graphite particles are composed of spheroidal and flake-like particles. The flake-like particles have a volume ratio of 10-40% of total graphite particles. The spheroidal particles have a cross-sectional structure with a plurality of AB planes of a graphite crystal laminated along a curved particle surface, from the surface toward a center direction. The flake-like graphite particles have a cross-sectional structure with the plurality of AB planes laminated in a thickness direction of the thin plate shape. The spheroidal particles have an average particle size of 3-50 ?m, and the flake-like graphite particles have an average particle size of 1-25 ?m.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: May 4, 2021
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Takayoshi Yamauchi
  • Patent number: 10794426
    Abstract: Provided is a partially-cylindrical sliding member including a sliding layer including fibrous particles having an average particle size of 5-25 ?m dispersed in a synthetic resin at a volume ratio of 10-35% of the sliding layer. The particles having a major axis length ?20 ?m are included at a volume ratio of ?10% to total particles. A sliding surface side area is defined from the sliding surface and has a thickness of 25% of a sliding layer thickness T, where the fibrous particles having a major axis length of ?20 ?m have a dispersion index of 1.1-6. An interface side area is defined from the interface and has a thickness of 25% of T, where the dispersion index is 1.1-6. An intermediate area is defined between the both areas, where the dispersion index is 0.1 to less than 1.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: October 6, 2020
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Takayoshi Yamauchi
  • Publication number: 20200309193
    Abstract: A sliding member for a journal bearing is provided. A sliding layer includes fibrous particles dispersed in a synthetic resin, and has a sliding surface side region and an interface side region. The particles have an average particle size Dsur, axi and Dsur, cir respectively in an axial and circumferential cross-section in the sliding surface side region, and Dint, axi and Dint, cir respectively in axial and circumferential cross-sections in the interface side region. Dsur, axi and Dint, cir are 5-30 ?m, and Dsur, cir and Dint, axi are 5 to 20% of respectively Dsur, axi and Dint, cir. A dispersion index of the particles having the major axis length of 20 ?m or longer is 5 or more, both in the sliding surface side region in view of the axial cross-section and in the interface side region in view of the circumferential cross-section.
    Type: Application
    Filed: March 24, 2020
    Publication date: October 1, 2020
    Inventor: Takayoshi YAMAUCHI
  • Publication number: 20200309194
    Abstract: A sliding member for a thrust bearing is provided. A sliding layer includes fibrous particles dispersed in a synthetic resin, and has a sliding surface side region and an interface side region. The particles have an average particle size Dsur, first and Dsur, second respectively in first and second cross-sections in the sliding surface side region, and Dint, first and Dint, second respectively in first and second cross-sections in the interface side region. Dsur, first and Dint, second are 5-30 ?m, and Dsur, second and Dint, first are 5 to 20% of respectively Dsur, first and Dint, second. A dispersion index of the particles having the major axis length of 20 ?m or longer is 5 or more, both in the sliding surface side region in view of the first cross-section and in the interface side region in view of the second cross-section.
    Type: Application
    Filed: March 24, 2020
    Publication date: October 1, 2020
    Inventor: Takayoshi YAMAUCHI
  • Patent number: 10458471
    Abstract: Provided is a partially-annular sliding member including a sliding layer including fibrous particles having an average particle size of 5-25 ?m dispersed in a synthetic resin at a volume ratio of 10-35% of the sliding layer. The particles having a major axis length?20 ?m are included at a volume ratio of ?10% to total particles. A sliding surface side area is defined from the sliding surface and has a thickness of 25% of a sliding layer thickness T, where the fibrous particles having a major axis length of ?20 ?m have a dispersion index of 1.1-6. An interface side area is defined from the interface and has a thickness of 25% of T, where the dispersion index is 1.1-6. An intermediate area is defined between the both areas, where the dispersion index is 0.1 to less than 1.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: October 29, 2019
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Takayoshi Yamauchi
  • Patent number: 10422380
    Abstract: A sliding member includes a sliding layer including graphite particles dispersed in a synthetic resin matrix. The graphite particles have a volume ratio of 5% to 50% and are composed of spheroidal particles and flake-like particles, respectively having a graphitization degree K1 and K2. The flake-like particles have a volume ratio of 10 to 40% with respect to a total volume of the graphite particles. The spheroidal particles have a cross-sectional structure with AB planes of a graphite crystal laminated from a surface toward a center. The flake-like particles have a cross-sectional structure with the AB planes laminated in a thickness direction. The spheroidal particles and the flake-like particles have an average particle size of 3 to 50 ?m, and 1 to 25 ?m respectively. K1 is 0.80 to 0.97 and K2 is greater than K1, and a difference K2 ?K1 is 0.03 to 0.15.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: September 24, 2019
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Takayoshi Yamauchi
  • Patent number: 10309139
    Abstract: Provided is a guide roller for a vehicular slide door. The guide roller has an annular metal inner ring; a retainer holding a bearing; an annular metal outer ring and a sliding layer including a synthetic resin. When the sliding layer is sectionalized into a sliding surface side area, an intermediate area and an interface side area, from the sliding surface to an interface with the outer ring, the synthetic resins in the sliding surface side area, the intermediate area and the interface side area have, respectively, a degree of crystallizations X1, X2 and X3 and nanoindenter hardnesses Y1, Y2 and Y3 wherein X2?X1 is less than 5%, and X2?X3 is less than 5% and wherein Y2 is not less than 115% of Y1, and Y2 is not less than 115% of Y3.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: June 4, 2019
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Takayoshi Yamauchi
  • Publication number: 20190055766
    Abstract: Provided is a guide roller for a vehicular slide door. The guide roller has an annular metal inner ring; a retainer holding a bearing; an annular metal outer ring and a sliding layer including a synthetic resin. When the sliding layer is sectionalized into a sliding surface side area, an intermediate area and an interface side area, from the sliding surface to an interface with the outer ring, the synthetic resins in the sliding surface side area, the intermediate area and the interface side area have, respectively, a degree of crystallizations X1, X2 and X3 and nanoindenter hardnesses Y1, Y2 and Y3 wherein X2?X1 is less than 5%, and X2?X3 is less than 5% and wherein Y2 is not less than 115% of Y1, and Y2 is not less than 115% of Y3.
    Type: Application
    Filed: August 2, 2018
    Publication date: February 21, 2019
    Inventor: Takayoshi YAMAUCHI
  • Publication number: 20180258990
    Abstract: Provided is a partially-annular sliding member including a sliding layer including fibrous particles having an average particle size of 5-25 ?m dispersed in a synthetic resin at a volume ratio of 10-35% of the sliding layer. The particles having a major axis length ?20 ?m are included at a volume ratio of ?10% to total particles. A sliding surface side area is defined from the sliding surface and has a thickness of 25% of a sliding layer thickness T, where the fibrous particles having a major axis length of ?20 ?m have a dispersion index of 1.1-6. An interface side area is defined from the interface and has a thickness of 25% of T, where the dispersion index is 1.1-6. An intermediate area is defined between the both areas, where the dispersion index is 0.1 to less than 1.
    Type: Application
    Filed: March 7, 2018
    Publication date: September 13, 2018
    Inventor: Takayoshi YAMAUCHI
  • Publication number: 20180258992
    Abstract: Provided is a partially-cylindrical sliding member including a sliding layer including fibrous particles having an average particle size of 5-25 ?m dispersed in a synthetic resin at a volume ratio of 10-35% of the sliding layer. The particles having a major axis length ?20 ?m are included at a volume ratio of ?10% to total particles. A sliding surface side area is defined from the sliding surface and has a thickness of 25% of a sliding layer thickness T, where the fibrous particles having a major axis length of ?20 ?m have a dispersion index of 1.1-6. An interface side area is defined from the interface and has a thickness of 25% of T, where the dispersion index is 1.1-6. An intermediate area is defined between the both areas, where the dispersion index is 0.1 to less than 1.
    Type: Application
    Filed: March 7, 2018
    Publication date: September 13, 2018
    Inventor: Takayoshi YAMAUCHI
  • Publication number: 20180087574
    Abstract: A sliding member includes a sliding layer including graphite particles dispersed in a synthetic resin matrix. The graphite particles have a volume ratio of 5% to 50% and are composed of spheroidal particles and flake-like particles, respectively having a graphitization degree K1 and K2. The flake-like particles have a volume ratio of 10 to 40% with respect to a total volume of the graphite particles. The spheroidal particles have a cross-sectional structure with AB planes of a graphite crystal laminated from a surface toward a center. The flake-like particles have a cross-sectional structure with the AB planes laminated in a thickness direction. The spheroidal particles and the flake-like particles have an average particle size of 3 to 50 and 1 to 25 ?m respectively. K1 is 0.80 to 0.97 and K2 is greater than K1, and a difference K2 ?K1 is 0.03 to 0.15.
    Type: Application
    Filed: September 14, 2017
    Publication date: March 29, 2018
    Inventor: Takayoshi YAMAUCHI
  • Publication number: 20170233671
    Abstract: A sliding member includes a back metal layer and a sliding layer on the back metal layer. The sliding layer includes a synthetic resin matrix and graphite particles dispersed in the matrix in a volume ratio of 5-50% of that of the sliding layer. The graphite particles are composed of spheroidal and flake-like particles. The flake-like particles have a volume ratio of 10-40% of total graphite particles. The spheroidal particles have a cross-sectional structure with a plurality of AB planes of a graphite crystal laminated along a curved particle surface, from the surface toward a center direction. The flake-like graphite particles have a cross-sectional structure with the plurality of AB planes laminated in a thickness direction of the thin plate shape. The spheroidal particles have an average particle size of 3-50 ?m, and the flake-like graphite particles have an average particle size of 1-25 ?m.
    Type: Application
    Filed: February 14, 2017
    Publication date: August 17, 2017
    Inventor: Takayoshi YAMAUCHI
  • Patent number: 9684135
    Abstract: In an optoelectrical connector including two connectors to be interconnected, each having at least one optical connection part and at least two electrical connection parts, the electrical connection parts of one of the connectors are pins and the electrical connection parts of the other connector are spring contacts. The connector having the spring contacts includes, before the spring contacts, positioning holes in which the pins are to be inserted. The tips of the pins come into contact with the spring contacts to make electrical connection. The bases of the pins fit in the positioning holes to perform positioning for optical connection. The optoelectrical connector can be smaller, lighter, and thinner.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: June 20, 2017
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Keiichi Mori, Takayoshi Yamauchi, Masuo Nishimoto, Shuichi Aihara
  • Patent number: 9632262
    Abstract: An optical module is formed of a first optical block and a second optical block each equipped with a lens the optical axis of which needs to be aligned, the blocks being positioned and secured to each other, and has stepwise positioning means. A positioning means includes spring pieces each having an abutting slope, and edges. Four spring pieces are formed in the second optical block such that their abutting slopes are disposed at four corners of the second optical block. Positioning is implemented when the abutting slopes meet the edges of the first optical block. Another positioning means includes a depressed part and a guide slope formed in one of the two optical blocks and a raised part formed in the other optical block. The raised part is fitted into the depressed part.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: April 25, 2017
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Shuichi Aihara, Keiichi Mori, Takayoshi Yamauchi, Osamu Hashiguchi, Eiichi Asami, Yoshihiko Hamada, Masuo Nishimoto, Hideo Sugimoto, Akira Watanabe, Satoshi Kai
  • Publication number: 20170075082
    Abstract: An optical module is formed of a first optical block and a second optical block each equipped with a lens the optical axis of which needs to be aligned, the blocks being positioned and secured to each other, and has stepwise positioning means. A positioning means includes spring pieces each having an abutting slope, and edges. Four spring pieces are formed in the second optical block such that their abutting slopes are disposed at four corners of the second optical block. Positioning is implemented when the abutting slopes meet the edges of the first optical block. Another positioning means includes a depressed part and a guide slope formed in one of the two optical blocks and a raised part formed in the other optical block. The raised part is fitted into the depressed part.
    Type: Application
    Filed: April 15, 2015
    Publication date: March 16, 2017
    Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Shuichi AIHARA, Keiichi MORI, Takayoshi YAMAUCHI, Osamu HASHIGUCHI, Eiichi ASAMI, Yoshihiko HAMADA, Masuo NISHIMOTO, Hideo SUGIMOTO, Akira WATANABE, Satoshi KAI
  • Patent number: D775082
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: December 27, 2016
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Satoshi Kai, Shuichi Aihara, Keiichi Mori, Takayoshi Yamauchi, Osamu Hashiguchi, Eiichi Asami, Yoshihiko Hamada, Masuo Nishimoto, Hideo Sugimoto, Akira Watanabe