Patents by Inventor Hidekazu YOSHIWARA

Hidekazu YOSHIWARA 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 and manufacturing method for tapered roller bearing
    Patent number: 10634192
    Abstract: In a tapered roller bearing, neighboring pillar parts constitute a first engagement allowance in which an inner diameter-side opening width of each of the pockets becomes smaller than a roller diameter at a position of the opening width in a direction of a rotation axis of each of the tapered rollers at at least a part of an inner diameter side of each of the pockets, and constitute a second engagement allowance in which an outer diameter-side opening width of each of the pockets becomes smaller than the roller diameter at a position of the opening width in the direction at at least a part of an outer diameter side of each of the pockets. Bumps are formed on an inner surface of the small diameter ring part in the pockets. Small diameter-side end faces of the tapered rollers facing the bumps are substantially flat surfaces.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: April 28, 2020
    Assignee: NSK LTD.
    Inventors: Hidekazu Yoshiwara, Hidenobu Magami, Masateru Kondo, Makoto Koganei, Shunichi Kiyono
  • TAPERED ROLLER BEARING AND MANUFACTURING METHOD FOR TAPERED ROLLER BEARING
    Publication number: 20190360530
    Abstract: In a tapered roller bearing, neighboring pillar parts constitute a first engagement allowance in which an inner diameter-side opening width of each of the pockets becomes smaller than a roller diameter at a position of the opening width in a direction of a rotation axis of each of the tapered rollers at at least a part of an inner diameter side of each of the pockets, and constitute a second engagement allowance in which an outer diameter-side opening width of each of the pockets becomes smaller than the roller diameter at a position of the opening width in the direction at at least a part of an outer diameter side of each of the pockets. Bumps are formed on an inner surface of the small diameter ring part in the pockets. Small diameter-side end faces of the tapered rollers facing the bumps are substantially flat surfaces.
    Type: Application
    Filed: September 16, 2016
    Publication date: November 28, 2019
    Applicant: NSK LTD.
    Inventors: Hidekazu YOSHIWARA, Hidenobu MAGAMI, Masateru KONDO, Makoto KOGANEI, Shunichi KIYONO