Patents by Inventor Kensaku Fujinaka

Kensaku Fujinaka 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 direct-acting devices with the grease composition
    Patent number: 8673830
    Abstract: A grease composition includes: a poly-?-olefin having a kinematic viscosity at 40 degrees C. of 60 to 320 mm2/s, the poly-?-olefin being contained in an amount of 50 mass % or more relative to a whole composition; a thickener that is a lithium salt of a hydroxyl-free fatty acid having 10 to 22 carbon atoms; and an ashless dithiocarbamate and/or zinc dithiocarbamate that are contained in an amount of 0.1 to 1.5 mass % in terms of sulfur relative to a whole composition. In the grease composition, a phosphorous content is 0.05 mass % or less relative to the whole composition, and a worked penetration is in a range from 265 to 310.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: March 18, 2014
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Yukitoshi Fujinami, Shigeo Hara, Hiroyuki Kitano, Kensaku Fujinaka, Hironori Yoshimura, Yasushi Ohara
  • GREASE COMPOSITION AND DIRECT-ACTING DEVICES WITH THE GREASE COMPOSITION
    Publication number: 20110041638
    Abstract: A grease composition includes: a poly-?-olefin having a kinematic viscosity at 40 degrees C. of 60 to 320 mm2/s, the poly-?-olefin being contained in an amount of 50 mass % or more relative to a whole composition; a thickener that is a lithium salt of a hydroxyl-free fatty acid having 10 to 22 carbon atoms; and an ashless dithiocarbamate and/or zinc dithiocarbamate that are contained in an amount of 0.1 to 1.5 mass % in terms of sulfur relative to a whole composition. In the grease composition, a phosphorous content is 0.05 mass % or less relative to the whole composition, and a worked penetration is in a range from 265 to 310.
    Type: Application
    Filed: April 7, 2009
    Publication date: February 24, 2011
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Yukitoshi Fujinami, Shigeo Hara, hiroyuki Kitano, Kensaku Fujinaka, Hironori Youshimura, Yasushi Ohara