Patents by Inventor Michitaka Yoshihara

Michitaka Yoshihara 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).

  • GREASE COMPOSITION AND ROLLING BEARING
    Publication number: 20230272299
    Abstract: The present invention relates to a grease composition including: a base oil; a thickener; a rust inhibitor; and an extreme pressure agent, in which the rust inhibitor includes, with respect to a total mass of the grease composition: 0.10 mass % to 10.00 mass % of a calcium sulfonate; 0.20 mass % to 10.00 mass % of a zinc sulfonate; and 0.10 mass % to 10.00 mass % of a zinc carboxylate, and the extreme pressure agent includes, with respect to the total mass of the grease composition, 2.00 mass % to 14.00 mass % of a zinc dialkyldithiophosphate.
    Type: Application
    Filed: July 5, 2021
    Publication date: August 31, 2023
    Applicants: JTEKT CORPORATION, KYODO YUSHI CO., LTD.
    Inventors: Kanako NIIYA, Kazunori MIYAKE, Masayuki MURAKAMI, Shota AKIMOTO, Takahiro MAEDA, Kaname NISHI, Michitaka YOSHIHARA, Kazuki ISA, Koki ANDO
  • Grease composition for constant velocity joints and constant velocity joint charged with the grease composition
    Patent number: 10612601
    Abstract: The invention provides a grease composition for constant velocity joints, which contains (a) a base oil, (b) a diurea thickener, (c) benzotriazole and/or a derivative thereof, and (d) a phosphate and/or an amine salt thereof; and a constant velocity joint where the grease composition is packed.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: April 7, 2020
    Assignees: KYODO YUSHI CO., LTD., NTN CORPORATION
    Inventors: Michitaka Yoshihara, Yuji Onuki, Mika Kohara, Shinichi Takabe
  • GREASE COMPOSITION FOR CONSTANT VELOCITY JOINTS AND CONSTANT VELOCITY JOINT CHARGED WITH THE GREASE COMPOSITION
    Publication number: 20160305488
    Abstract: The invention provides a grease composition for constant velocity joints, which contains (a) a base oil, (b) a diurea thickener, (c) benzotriazole and/or a derivative thereof, and (d) a phosphate and/or an amine salt thereof; and a constant velocity joint where the grease composition is packed.
    Type: Application
    Filed: December 4, 2014
    Publication date: October 20, 2016
    Applicants: KYODO YUSHI CO., LTD., NTN CORPORATION
    Inventors: Michitaka YOSHIHARA, Yuji ONUKI, Mika KOHARA, Shinichi TAKABE
  • GREASE COMPOSITION AND CONSTANT VELOCITY JOINT
    Publication number: 20120195678
    Abstract: The invention provides a grease composition containing (a) a base oil, (b) a lithium soap based thickener, (c) at least one stearic acid metallic salt selected from the group consisting of Ca stearate, Mg stearate and Zn stearate, (d) molybdenum dialkyl dithiocarbamate sulfide, and (e) zinc dialkyl dithiocarbamate sulfide. The present invention also provides a constant velocity joint such as a Barfield constant velocity joint (BJ), double offset constant velocity joint (DOJ), tripod constant velocity joint (TJ) or the like, containing the above-mentioned grease composition therein. The grease composition of the invention is excellent in antiwear properties and suitable for the constant velocity joint.
    Type: Application
    Filed: October 5, 2010
    Publication date: August 2, 2012
    Applicants: NTN CORPORATION, KYODO YUSHI CO., LTD.
    Inventors: Mitsuhiro Kakizaki, Daigo Nagumo, Michitaka Yoshihara, Shinichi Takabe