Patents by Inventor Tomoaki SAKASE

Tomoaki SAKASE 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).

  • Machined cage for thrust ball bearing, design method of the same, and thrust ball bearing including the cage
    Patent number: 10228021
    Abstract: In a copper alloy machined cage for a thrust ball bearing, an inside surface of a pocket includes a cylindrical surface, a support surface which is continuous with the cylindrical surface and contacts a ball in an axial direction, and two protruding portions which are formed at an equal interval in a circumferential direction of the pocket, at a ball insertion side of the pocket which is opposite to the support surface in the axial direction and protrude from the cylindrical surface. The protruding portions prevent falling out of the ball from a ball insertion side opening of the pocket and are either elastically deformed or elastic-plastically deformed by the ball during insertion of the ball into the pocket.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: March 12, 2019
    Assignee: NSK LTD.
    Inventors: Tomoaki Sakase, Takanori Kurokawa
  • Machined cage for thrust ball bearing, design method of the same, and thrust ball bearing including the cage
    Patent number: 10190632
    Abstract: In a copper alloy machined cage for a thrust ball bearing, an inside surface of a pocket includes a cylindrical surface, a support surface which is continuous with the cylindrical surface and contacts a ball in an axial direction, and two protruding portions which are formed at an equal interval in a circumferential direction of the pocket, at a ball insertion side of the pocket which is opposite to the support surface in the axial direction and protrude from the cylindrical surface. The protruding portions prevent falling out of the ball from a ball insertion side opening of the pocket and are either elastically deformed or elastic-plastically deformed by the ball during insertion of the ball into the pocket.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: January 29, 2019
    Assignee: NSK LTD.
    Inventors: Tomoaki Sakase, Takanori Kurokawa
  • MACHINED CAGE FOR THRUST BALL BEARING, DESIGN METHOD OF THE SAME, AND THRUST BALL BEARING INCLUDING THE CAGE
    Publication number: 20170089392
    Abstract: In a copper alloy machined cage for a thrust ball bearing, an inside surface of a pocket includes a cylindrical surface, a support surface which is continuous with the cylindrical surface and contacts a ball in an axial direction, and two protruding portions which are formed at an equal interval in a circumferential direction of the pocket, at a ball insertion side of the pocket which is opposite to the support surface in the axial direction and protrude from the cylindrical surface. The protruding portions prevent falling out of the ball from a ball insertion side opening of the pocket and are either elastically deformed or elastic-plastically deformed by the ball during insertion of the ball into the pocket.
    Type: Application
    Filed: March 16, 2015
    Publication date: March 30, 2017
    Applicant: NSK LTD.
    Inventors: Tomoaki SAKASE, Takanori KUROKAWA