Patents by Inventor Sohei Beppu

Sohei Beppu 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).

  • Retainer for roller bearing and needle roller bearing
    Patent number: 8864387
    Abstract: A retainer for a roller bearing holds needle rollers within slit-shaped pockets which are formed separately by means of partitions arranged with a fixed pitch in the circumferential direction. Each partition is equipped with two side faces, which face the sides of the adjacent partitions, and an outer-circumferential-side end face, which faces the outer circumferential side of the retainer, and retaining protrusions are formed at the corner parts where the outer-circumferential-side end faces and each side face intersect. Each retaining protrusion protrudes farther to the outer circumferential side from the outer-circumferential-side end face, and protrudes obliquely in the direction in which the aperture width of the pockets is narrowed. For each pocket the positions where the retaining protrusions are formed in the longitudinal direction of the partitions are set so as not to overlap the adjacent pockets.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: October 21, 2014
    Assignee: Harmonic Drive Systems, Inc.
    Inventors: Yoshihide Kiyosawa, Keiji Ueura, Sohei Beppu
  • RETAINER FOR ROLLER BEARING AND NEEDLE ROLLER BEARING
    Publication number: 20140016892
    Abstract: A retainer for a roller bearing holds needle rollers within slit-shaped pockets which are formed separately by means of partitions arranged with a fixed pitch in the circumferential direction. Each partition is equipped with two side faces, which face the sides of the adjacent partitions, and an outer-circumferential-side end face, which faces the outer circumferential side of the retainer, and retaining protrusions are formed at the corner parts where the outer-circumferential-side end faces and each side face intersect. Each retaining protrusion protrudes farther to the outer circumferential side from the outer-circumferential-side end face, and protrudes obliquely in the direction in which the aperture width of the pockets is narrowed. For each pocket the positions where the retaining protrusions are formed in the longitudinal direction of the partitions are set so as not to overlap the adjacent pockets.
    Type: Application
    Filed: May 24, 2011
    Publication date: January 16, 2014
    Applicant: HARMONIC DRIVE SYSTEMS, INC.
    Inventors: Yoshihide Kiyosawa, Keiji Ueura, Sohei Beppu