Patents by Inventor Masamitsu Ohtsubo

Masamitsu Ohtsubo 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).

  • Resin gear for electric power steering apparatus and electric power steering apparatus equipped with the same
    Patent number: 7475612
    Abstract: A resin gear for an electric power steering apparatus is provided which offers excellent mechanical strength and durability, and in which damage of teeth, does not occur even when the gear is employed in an electric power steering apparatus equipped with a high-power electric actuator. The resin gear for an electric power steering apparatus includes a worm wheel, and a gear portion thereof is formed of a resin molding material containing a thermosetting resin and polyparaphenylene-benzobisoxazole fibers (PBO fibers) as essential constituents.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: January 13, 2009
    Assignees: Asahi Organic Chemicals Industry Co., Ltd., JTEKT Corporation
    Inventors: Toshihiko Kaneiwa, Masamitsu Ohtsubo, Takanori Kurokawa, Hirokazu Arai
  • RESIN GEAR FOR ELECTRIC POWER STEERING APPARATUS AND ELECTRIC POWER STEERING APPARATUS EQUIPPED WITH THE SAME
    Publication number: 20080066993
    Abstract: It is an object of the present invention to provide a resin gear for an electric power steering apparatus excellent in mechanical strength and durability, in which damage of teeth, for example, does not occur even when the gear is employed in an electric power steering apparatus equipped with a high-power electric actuator. In a resin gear for an electric power steering apparatus in the form of a worm wheel 10, a gear portion 16 thereof is formed of a resin molding material containing a thermosetting resin and polyparaphenylene-benzobisoxazole fibers (PBO fibers) as essential constituents.
    Type: Application
    Filed: November 5, 2007
    Publication date: March 20, 2008
    Applicants: Asahi Organic Chemicals Industry Co., Ltd., JTEKT Corporation
    Inventors: Toshihiko Kaneiwa, Masamitsu Ohtsubo, Takanori Kurokawa, Hirokazu Arai