Patents by Inventor Atsushi Minakami

Atsushi Minakami 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).

  • Cage and rolling bearing
    Patent number: 8985859
    Abstract: A cage 11 for holding a plurality of rolling elements 20 incorporated between an inner ring and an outer ring by a plurality of pockets with their centers arranged at regular intervals in the revolving direction of the rolling elements 20 includes at least one drive pocket 14 having a smaller clearance 22 in the revolving direction of the cage 11 and rolling elements 20 than the clearances of the remaining non-drive pockets 15 in the cage 11. Thus, drive power to be applied to the cage 11 can be always maintained constant and the swinging motion of the cage 11 during revolution can be prevented, thereby being able to reduce cage sounds.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: March 24, 2015
    Assignee: NSK Ltd.
    Inventors: Kenta Kenmochi, Atsushi Minakami, Yoshiaki Katsuno
  • CAGE AND ROLLING BEARING
    Publication number: 20140193111
    Abstract: A cage 11 for holding a plurality of rolling elements 20 incorporated between an inner ring and an outer ring by a plurality of pockets with their centers arranged at regular intervals in the revolving direction of the rolling elements 20 includes at least one drive pocket 14 having a smaller clearance 22 in the revolving direction of the cage 11 and rolling elements 20 than the clearances of the remaining non-drive pockets 15 in the cage 11. Thus, drive power to be applied to the cage 11 can be always maintained constant and the swinging motion of the cage 11 during revolution can be prevented, thereby being able to reduce cage sounds.
    Type: Application
    Filed: November 29, 2012
    Publication date: July 10, 2014
    Inventors: Kenta Kenmochi, Atsushi Minakami, Yoshiaki Katsuno
  • Ball screw device
    Patent number: 7921743
    Abstract: A ball circulating member constructed in an external face of a nut is provided with ball scooping sections for scooping up balls rolling on between ball screw grooves of a screw shaft and the nut, along a line tangent to a center orbital circle of the balls. The path length of a ball scooping path section formed in the ball scooping sections is set to be ½ or greater of the diameter of the ball.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: April 12, 2011
    Assignee: NSK Ltd.
    Inventors: Tsutomu Ohkubo, Atsushi Minakami
  • Ball screw device
    Publication number: 20060027038
    Abstract: A ball circulating member constructed in an external face of a nut is provided with ball scooping sections for scooping up balls rolling on between ball screw grooves of a screw shaft and the nut, along a line tangent to a center orbital circle of the balls. The path length of a ball scooping path section formed in the ball scooping sections is set to be ½ or greater of the diameter of the ball.
    Type: Application
    Filed: August 5, 2005
    Publication date: February 9, 2006
    Inventors: Tsutomu Ohkubo, Atsushi Minakami