Patents by Inventor Motoyuki Miyaji

Motoyuki Miyaji 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).

  • Friction material
    Patent number: 11905182
    Abstract: A friction material includes granulated hematite fired particle. The granulated hematite fired particle has 25 ?m to 300 ?m of an average particle diameter. The granulated hematite fired particle has 30 mm3/g to 300 mm3/g of a fine pore volume.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: February 20, 2024
    Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Takuya Takada, Motoyuki Miyaji, Kentaro Owa
  • FRICTION MATERIAL
    Publication number: 20220381309
    Abstract: There is provided a friction material including: a friction modifier; a binder; and a fibrous material. A phosphate-based dispersant is contained as the friction modifier. Preferably, a content of the phosphate-based dispersant is 0.2 mass % to 2.0 mass %. Preferably, the phosphate-based dispersant is at least one selected from a group consisting of sodium hexametaphosphate, sodium polyphosphate, and sodium pyrophosphate.
    Type: Application
    Filed: October 16, 2020
    Publication date: December 1, 2022
    Applicant: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Kentaro OWA, Motoyuki MIYAJI, Takuya TAKADA, Kenta KIMURA
  • FRICTION MATERIAL FOR DISC BRAKE
    Publication number: 20220163081
    Abstract: An object of the present invention is to provide a friction material for disc brake that can prevent occurrence of a rust adhesion phenomenon and has stable friction characteristics even after being left in a low temperature and high humidity environment. The present invention relates to a friction material for disc brake, containing: a wax containing, as a main component, an ester of a higher fatty acid and a higher alcohol.
    Type: Application
    Filed: March 16, 2020
    Publication date: May 26, 2022
    Applicant: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Takuya TAKADA, Motoyuki MIYAJI, Kentaro OWA, Kenta KIMURA
  • FRICTION MATERIAL
    Publication number: 20220010857
    Abstract: A friction material includes a friction modifier, a binder, and a fibrous material. An alkali metal salt of phosphoric acid and a metal sulfide are contained as the friction modifier. The alkali metal salt of phosphoric acid may include trisodium phosphate. A wax containing, as a main component, an ester of a higher fatty acid and a higher alcohol may be contained as the friction modifier.
    Type: Application
    Filed: March 16, 2020
    Publication date: January 13, 2022
    Applicant: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Yuta WATANABE, Motoyuki MIYAJI, Hiroshi YAMAMOTO, Takuya TAKADA
  • Friction material composition and friction material
    Patent number: 11209063
    Abstract: A friction material composition of the present invention includes a fibrous base, a friction regulator, and a binder and has a copper content of 0.5 mass % or less in terms of copper element amount. The friction material composition contains regenerated cellulosic fibers as the fibrous base. In an embodiment of the friction material composition, the regenerated cellulose fiber has a fiber length of 2 mm to 20 mm.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: December 28, 2021
    Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Toru Kawata, Takuya Takada, Motoyuki Miyaji
  • FRICTION MATERIAL
    Publication number: 20200239327
    Abstract: A friction material includes granulated hematite fired particle. The granulated hematite fired particle has 25 ?m to 300 ?m of an average particle diameter. The granulated hematite fired particle has 30 mm3/g to 300 mm3/g of a fine pore volume.
    Type: Application
    Filed: August 8, 2018
    Publication date: July 30, 2020
    Applicant: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Takuya TAKADA, Motoyuki MIYAJI, Kentaro OWA
  • FRICTION MATERIAL COMPOSITION AND FRICTION MATERIAL
    Publication number: 20200063814
    Abstract: A friction material composition of the present invention includes a fibrous base, a friction regulator, and a binder and has a copper content of 0.5 mass % or less in terms of copper element amount. The friction material composition contains regenerated cellulosic fibers as the fibrous base. In an embodiment of the friction material composition, the regenerated cellulose fiber has a fiber length of 2 mm to 20 mm.
    Type: Application
    Filed: November 1, 2017
    Publication date: February 27, 2020
    Applicant: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Toru KAWATA, Takuya TAKADA, Motoyuki MIYAJI
  • Friction material composition, friction material and production method thereof
    Patent number: 10323708
    Abstract: A friction material composition containing an alkali metal salt as a friction adjusting material. The alkali metal salt is spherical and porous. The alkali metal salt has an average particle diameter of 20 ?m to 240 ?m. A friction material is produced by using the friction material composition.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: June 18, 2019
    Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Motoyuki Miyaji, Yuji Iwao
  • Friction material
    Patent number: 10233989
    Abstract: A friction material includes a fiber base material, a friction modifying material and a binder. The friction modifying material includes alumina particles including, as a main component, ?-alumina particles. The ?-alumina particles are contained in an amount of 1 mass % or more in the friction material.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: March 19, 2019
    Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Takuya Takada, Motoyuki Miyaji, Toru Kawata
  • Friction material
    Patent number: 10190649
    Abstract: This friction material contains a fiber base material, a friction modifier and a binder. The content of copper in the friction material is not more than 0.5 mass % in terms of elemental copper, and the content of the binder is at least 10 mass %. Furthermore, the friction material contains calcium hydroxide and zinc, and has a pH of at least 11.7.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: January 29, 2019
    Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Motoyuki Miyaji, Katsumi Shibuya, Takayuki Watanabe
  • Mold for brake pad friction material, manufacturing apparatus, manufacturing method, preform, and brake pad
    Patent number: 10144189
    Abstract: A mold of a brake pad friction material, including a mold member fitted into a mold frame into which a powder material of the brake pad friction material is put, in which the mold member is configured such that a pressing surface in a surface of the mold member, which forms a region abutting the powder material put into a mold frame, has a concave shape that is formed by being gradually recessed from both end portion sides to a center portion side of the pressing surface.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: December 4, 2018
    Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Hiroshi Kasuya, Takuya Kitami, Motoyuki Miyaji, Michinori Yanagi
  • FRICTION MATERIAL
    Publication number: 20170254378
    Abstract: A friction material includes a fiber base material, a friction modifying material and a binder. The friction modifying material includes alumina particles including, as a main component, ?-alumina particles. The ?-alumina particles are contained in an amount of 1 mass % or more in the friction material.
    Type: Application
    Filed: March 2, 2017
    Publication date: September 7, 2017
    Applicant: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Takuya TAKADA, Motoyuki MIYAJI, Toru KAWATA
  • FRICTION MATERIAL COMPOSITION, FRICTION MATERIAL AND PRODUCTION METHOD THEREOF
    Publication number: 20160312846
    Abstract: A friction material composition containing an alkali metal salt as a friction adjusting material. The alkali metal salt is spherical and porous. The alkali metal salt has an average particle diameter of 20 ?m to 240 ?m. A friction material is produced by using the friction material composition.
    Type: Application
    Filed: April 25, 2016
    Publication date: October 27, 2016
    Inventors: Motoyuki MIYAJI, Yuji IWAO
  • FRICTION MATERIAL
    Publication number: 20160273604
    Abstract: This friction material contains a fiber base material, a friction modifier and a binder. The content of copper in the friction material is not more than 0.5 mass % in terms of elemental copper, and the content of the binder is at least 10 mass %. Furthermore, the friction material contains calcium hydroxide and zinc, and has a pH of at least 11.7.
    Type: Application
    Filed: November 11, 2014
    Publication date: September 22, 2016
    Inventors: Motoyuki MIYAJI, Katsumi SHIBUYA, Takayuki WATANABE
  • FRICTION MATERIAL COMPOSITION AND FRICTION MATERIAL
    Publication number: 20160245353
    Abstract: A friction material composition including a fiber base material, a binder and a friction modifier. A content of copper in the friction material composition is 0.5% by mass or less and the friction material composition includes a fluorine-based polymer particle. A friction material is formed by molding the friction material composition.
    Type: Application
    Filed: November 11, 2014
    Publication date: August 25, 2016
    Inventors: Yuji HANAIE, Katsuji SEKI, Yoshiyuki SUGAI, Motoyuki MIYAJI
  • MOLD FOR BRAKE PAD FRICTION MATERIAL, MANUFACTURING APPARATUS, MANUFACTURING METHOD, PREFORM, AND BRAKE PAD
    Publication number: 20160129656
    Abstract: A mold of a brake pad friction material, including a mold member fitted into a mold frame into which a powder material of the brake pad friction material is put, in which the mold member is configured such that a pressing surface in a surface of the mold member, which forms a region abutting the powder material put into a mold frame, has a concave shape that is formed by being gradually recessed from both end portion sides to a center portion side of the pressing surface.
    Type: Application
    Filed: June 17, 2014
    Publication date: May 12, 2016
    Applicant: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Hiroshi KASUYA, Takuya KITAMI, Motoyuki MIYAJI, Michinori YANAGI
  • Friction material
    Publication number: 20070287768
    Abstract: Anon-asbestos friction material is provided with a fibrous base material, a friction modifier, and a binder, wherein a partially graphitized coke is blended in a ratio of 0.5 vol % to 2.5 vol %. By blending the partially graphitized coke, compression strain of the friction material is adjusted so as to improve brake feeling without deteriorating friction properties.
    Type: Application
    Filed: June 8, 2007
    Publication date: December 13, 2007
    Inventors: Motoyuki Miyaji, Daisuke Hamagata, Satoshi Kusaka, Shuichi Oshiden