Patents by Inventor Takumi Takeuchi

Takumi Takeuchi 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).

  • Tapered roller bearing resin cage and tapered roller bearing
    Patent number: 9039288
    Abstract: There is provided a resin cage of a tapered roller bearing. The cage includes a small diameter annular portion, a large diameter annular portion, and a plurality of bar portions arranged at intervals in a circumferential direction to connect the annular portions. The bar portion has a pair of circumferentially-directed side surfaces, each having a roller guide surface, and an inner-side inner peripheral surface, a circumferential width of which is smaller on a side of the large diameter annular portion than on a side of the small diameter annular portion, and has a roller retaining region in which a radially outer side pocket width and a radially inner side pocket width between the opposed circumferentially-directed side surfaces of the adjacent bar portions are smaller than a diameter of the roller.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: May 26, 2015
    Assignee: NSK LTD.
    Inventors: Takumi Takeuchi, Ryosuke Yamada, Kinji Yukawa, Tomoharu Saito, Hiroki Maejima, Kimiko Nakai
  • TAPERED ROLLER BEARING RESIN CAGE AND TAPERED ROLLER BEARING
    Publication number: 20110142389
    Abstract: There is provided a resin cage of a tapered roller bearing. The cage includes a small diameter annular portion, a large diameter annular portion, and a plurality of bar portions arranged at intervals in a circumferential direction to connect the annular portions. The bar portion has a pair of circumferentially-directed side surfaces, each having a roller guide surface, and an inner-side inner peripheral surface, a circumferential width of which is smaller on a side of the large diameter annular portion than on a side of the small diameter annular portion, and has a roller retaining region in which a radially outer side pocket width and a radially inner side pocket width between the opposed circumferentially-directed side surfaces of the adjacent bar portions are smaller than a diameter of the roller.
    Type: Application
    Filed: July 7, 2009
    Publication date: June 16, 2011
    Applicant: NSK LTD.
    Inventors: Takumi Takeuchi, Ryosuke Yamada, Kinji Yukawa, Tomoharu Saito, Hiroki Maejima, Kimiko Nakai