Patents by Inventor Yasuha TOKUMO

Yasuha TOKUMO 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 for constant velocity joints, and constant velocity joint in which same is sealed
    Patent number: 10829714
    Abstract: The present invention provides a grease composition for constant velocity joints, which includes a lubricating base oil, a thickener including a nitrogen-containing compound, a triglyceride, a diester, and a boron nitride, wherein a total content of the triglyceride and the diester is 1 to 5 mass % based on a total amount of the grease composition, and a mass ratio of a content of the triglyceride to a content of the diester (triglyceride/diester) is 0.3 to 1.5.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: November 10, 2020
    Assignees: JXTG NIPPON OIL & ENERGY CORPORATION, NTN CORPORATION
    Inventors: Takashi Arai, Yasuha Tokumo, Minoru Ishijima, Takeyoshi Konomoto
  • GREASE COMPOSITION FOR CONSTANT VELOCITY JOINTS, AND CONSTANT VELOCITY JOINT IN WHICH SAME IS SEALED
    Publication number: 20190177644
    Abstract: The present invention provides a grease composition for constant velocity joints, which includes a lubricating base oil, a thickener including a nitrogen-containing compound, a triglyceride, a diester, and a boron nitride, wherein a total content of the triglyceride and the diester is 1 to 5 mass % based on a total amount of the grease composition, and a mass ratio of a content of the triglyceride to a content of the diester (triglyceride/diester) is 0.3 to 1.5.
    Type: Application
    Filed: June 22, 2017
    Publication date: June 13, 2019
    Applicants: JXTG NIPPON OIL & ENERGY CORPORATION, NTN CORPORATION
    Inventors: Takashi ARAI, Yasuha TOKUMO, Minoru ISHIJIMA, Takeyoshi KONOMOTO