Patents by Inventor Makoto Kutsukake

Makoto Kutsukake 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).

  • Dynamic fluid pressure bearing, spindle motor, disk drive apparatus and method for manufacturing the dynamic fluid pressure bearing
    Patent number: 8215842
    Abstract: A fluid dynamic pressure bearing includes a shaft arranged along a central axis, an annular member fixed to the shaft, a sleeve, a lubricant, and a lubricating film. A stepped surface is provided on the outer circumferential surface of the shaft. The annular member preferably includes a lower surface extending radially with respect to the central axis and arranged to make contact with the stepped surface in the inner edge portion of the lower surface. The sleeve preferably includes an upper surface axially opposed to the lower surface of the annular member. The lubricant is provided between the shaft and the sleeve and between the annular member and the sleeve. The lubricating film is provided on the lower surface of the annular member at least over a region lying radially outwardly of the inner edge portion of the lower surface.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: July 10, 2012
    Assignee: Nidec Corporation
    Inventors: Tetsuya Maruyama, Makoto Kutsukake, Hirofumi Kojima, Michihiro Ito, Masayoshi Saichi
  • DYNAMIC FLUID PRESSURE BEARING, SPINDLE MOTOR, DISK DRIVE APPARATUS AND METHOD FOR MANUFACTURING THE DYNAMIC FLUID PRESSURE BEARING
    Publication number: 20090196540
    Abstract: A fluid dynamic pressure bearing includes a shaft arranged along a central axis, an annular member fixed to the shaft, a sleeve, a lubricant, and a lubricating film. A stepped surface is provided on the outer circumferential surface of the shaft. The annular member preferably includes a lower surface extending radially with respect to the central axis and arranged to make contact with the stepped surface in the inner edge portion of the lower surface. The sleeve preferably includes an upper surface axially opposed to the lower surface of the annular member. The lubricant is provided between the shaft and the sleeve and between the annular member and the sleeve. The lubricating film is provided on the lower surface of the annular member at least over a region lying radially outwardly of the inner edge portion of the lower surface.
    Type: Application
    Filed: January 30, 2009
    Publication date: August 6, 2009
    Applicant: Nidec Corporation
    Inventors: Tetsuya MARUYAMA, Makoto KUTSUKAKE, Hirofumi KOJIMA, Michihiro ITO, Masayoshi SAICHI