Patents by Inventor Kouichirou NAITOU

Kouichirou NAITOU 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).

  • Double row ball bearing and shaft support device
    Patent number: 9752619
    Abstract: A double row ball bearing includes: an outer ring; an inner ring; a plurality of first balls disposed between the outer ring and the inner ring to form a first ball row; a plurality of second balls disposed between the outer ring and the inner ring to form a second ball row having a pitch circle diameter larger than that of the first ball row; an annular first cage having a plurality of first pockets in which the first balls are held; an annular second cage having a plurality of second pockets in which the second balls are held; and an annular portion that covers, together with the outer ring, a portion of each second ball held in the second pocket from the radially outside, the portion being exposed on the outside of the second pocket and oriented radially outward.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: September 5, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Yuzuru Takahashi, Daisuke Okamoto, Kouichirou Naitou
  • DOUBLE ROW BALL BEARING AND SHAFT SUPPORT DEVICE
    Publication number: 20150292559
    Abstract: A double row ball bearing includes: an outer ring; an inner ring; a plurality of first balls disposed between the outer ring and the inner ring to form a first ball row; a plurality of second balls disposed between the outer ring and the inner ring to form a second ball row having a pitch circle diameter larger than that of the first ball row; an annular first cage having a plurality of first pockets in which the first balls are held; an annular second cage having a plurality of second pockets in which the second balls are held; and an annular portion that covers, together with the outer ring, a portion of each second ball held in the second pocket from the radially outside, the portion being exposed on the outside of the second pocket and oriented radially outward.
    Type: Application
    Filed: April 15, 2015
    Publication date: October 15, 2015
    Inventors: Yuzuru TAKAHASHI, Daisuke OKAMOTO, Kouichirou NAITOU