Patents by Inventor Yoshihisa Imamoto

Yoshihisa Imamoto 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 hub unit bearing
    Patent number: 8895489
    Abstract: The invention provides a grease composition for hub unit bearing, containing (a) an aromatic diurea thickener, (b) a base oil, (c) a metal salt of oxidized wax, (d) diphenyl hydrogen phosphate, and (e) at least one rust preventive selected from the group consisting of sulfonate rust preventives and carboxylic acid rust preventives. The grease composition of the invention shows excellent anti-fretting properties at low temperature, and at the same time, exhibit excellent rust preventing properties.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: November 25, 2014
    Assignees: Kyodo Yushi Co., Ltd., NTN Corporation
    Inventors: Takashi Azuma, Yoshihisa Imamoto, Motohiro Ito, Yasushi Shibata
  • GREASE COMPOSITION FOR HUB UNIT BEARING
    Publication number: 20130157915
    Abstract: The invention provides a grease composition for huh unit bearing, containing (a) an aromatic diurea thickener, (b) a base oil, (c) a metal salt of oxidized wax, (d) diphenyl hydrogen phosphate, and (e) at least one rust preventive selected from the group consisting of sulfonate rust preventives and carboxylic acid rust preventives. The grease composition of the invention shows excellent anti-fretting properties at low temperature, and at the same time, exhibit excellent rust preventing properties.
    Type: Application
    Filed: September 2, 2011
    Publication date: June 20, 2013
    Applicants: NTN CORPORATION, KYODO YUSHI CO., LTD.
    Inventors: Takashi Azuma, Yoshihisa Imamoto, Motohiro Ito, Yasushi Shibata