Patents by Inventor Kouichi Numazawa

Kouichi Numazawa 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
    Publication number: 20090176671
    Abstract: The present invention provides a grease composition for use in constant velocity joints, having improved wear resistance and endurance characteristics. The grease is made by incorporating in a urea grease (A) a molybdenum dialkyldithiocarbamate, (B) a molybdenum dithiophosphate, (C) 2-(4-morpholinyldithio)benzothiazole and (D) a calcium sulphonate. The blended amount of (A)+(B) is made not more than 10% by weight, and that of (C) and (D) not more than 3% by weight respectively. Also, a grease for use in constant velocity joints is made by further adding (E) zinc dithiophosphate to the aforementioned components (A)+(B)+(C)+(D) in a blended amount of not more than 3% by weight.
    Type: Application
    Filed: May 9, 2007
    Publication date: July 9, 2009
    Applicants: Showa Shell Sekiyu K.K., NTN Corporation
    Inventors: Takahiro Ozaki, Kouichi Numazawa, Shinichi Takabe, Takaaki Shibata
  • Urea grease composition
    Publication number: 20040224859
    Abstract: A urea grease composition is provided containing a lubricating base oil and from 2 to 30 wt.
    Type: Application
    Filed: December 4, 2003
    Publication date: November 11, 2004
    Inventors: Kouichi Numazawa, Kazushige Ohmura, Takahiro Ozaki, Keiji Tanaka