Patents by Inventor Hiroto Yasutake

Hiroto Yasutake 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).

  • Rotary anode type X-ray tube and X-ray tube apparatus provided with the same
    Patent number: 6449339
    Abstract: Disclosed is a rotary anode type X-ray comprising a substantially columnar stator, a cylindrical first rotor coupled around the stator, at least one hydrodynamic slide bearing region including a spiral groove, and arranged in the coupled portion between the stator and the first rotor, and a cylindrical second rotor arranged coaxial with and outside the first rotor with a gap for the heat insulation and bonded directly or indirectly to a anode disk, the second rotor being bonded to the first rotor in an open edge region positioned remote from the anode disk in terms of the heat transmission route, wherein a plurality of slits extending substantially along the axis of rotation are formed apart from each other in the circumferential direction in the open edge region in which the second rotor is bonded to the first rotor.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: September 10, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hiroto Yasutake
  • Rotary anode type x-ray tube and x-ray tube apparatus provided with the same
    Publication number: 20010055365
    Abstract: Disclosed is a rotary anode type X-ray comprising a substantially columnar stator, a cylindrical first rotor coupled around the stator, at least one hydrodynamic slide bearing region including a spiral groove, and arranged in the coupled portion between the stator and the first rotor, and a cylindrical second rotor arranged coaxial with and outside the first rotor with a gap for the heat insulation and bonded directly or indirectly to a anode disk, the second rotor being bonded to the first rotor in an open edge region positioned remote from the anode disk in terms of the heat transmission route, wherein a plurality of slits extending substantially along the axis of rotation are formed apart from each other in the circumferential direction in the open edge region in which the second rotor is bonded to the first rotor.
    Type: Application
    Filed: June 14, 2001
    Publication date: December 27, 2001
    Inventor: Hiroto Yasutake