Patents by Inventor Masaaki Inagi

Masaaki Inagi 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).

  • Production method of fluid dynamic-pressure bearing in spindle motor
    Patent number: 7908737
    Abstract: A gas is fed, so as to cause a gas flow to occur from a lower opening of a bearing hole of a sleeve 6 in an outward direction of an annular portion 12a of a rotor hub 12 via a radial gap 50 and an upper opening of the bearing hole, thereby lifting a rotor section 10. In a condition where the rotor section 10 is lifted, the magnitude of run-out synchronized with the rotation of the rotor section 10 is measured by using a displacement gauge 40. Then, based on the magnitude of run-out synchronized with the rotation, the run-out of the rotor section 10 is adjusted.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: March 22, 2011
    Assignee: Nidec Corporation
    Inventors: Hosei Kudou, Hirofumi Takayama, Takashi Nishina, Masaaki Inagi
  • PRODUCTION METHOD OF FLUID DYNAMIC-PRESSURE BEARING AND SPINDLE MOTOR FURNISHED WITH THE FLUID DYNAMIC-PRESSURE BEARING
    Publication number: 20080265703
    Abstract: A gas is fed, so as to cause a gas flow to occur from a lower opening of a bearing hole of a sleeve 6 in an outward direction of an annular portion 12a of a rotor hub 12 via a radial gap 50 and an upper opening of the bearing hole, thereby lifting a rotor section 10. In a condition where the rotor section 10 is lifted, the magnitude of run-out synchronized with the rotation of the rotor section 10 is measured by using a displacement gauge 40. Then, based on the magnitude of run-out synchronized with the rotation, the run-out of the rotor section 10 is adjusted.
    Type: Application
    Filed: April 23, 2008
    Publication date: October 30, 2008
    Applicant: NIDEC CORPORATION
    Inventors: Hosei KUDOU, Hirofumi TAKAYAMA, Takashi NISHINA, Masaaki INAGI
  • Shower bath apparatus and spray nozzle
    Patent number: 6195814
    Abstract: A shower bath apparatus which enables hot water bathing in a relaxed condition and provides a warm feeling over the whole body, equivalent to bathing in a bath tub. The shower bath apparatus comprises a shower bath apparatus body, a seat, on which a bathing person is seated, a spray nozzle for jetting hot water to the bathing person, and an arm provided with at least one spray nozzle. Sprayed hot water envelops the whole body of a user in a seated position to give the user a warm feeling.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: March 6, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroaki Yoshida, Shigeru Shirai, Masaaki Kawaguri, Kazushige Kawahara, Masaaki Inagi, Masaki Yamamoto, Hirofumi Gyokusen
  • Shower bath apparatus and spray nozzle
    Patent number: RE38841
    Abstract: A shower bath apparatus which enables hot water bathing in a relaxed condition and provides a warm feeling over the whole body, equivalent to bathing in a bath tub. The shower bath apparatus comprises a shower bath apparatus body, a seat, on which a bathing person is seated, a spray nozzle for jetting hot water to the bathing person, and an arm provided with at least one spray nozzle. Sprayed hot water envelops the whole body of a user in a seated position to give the user a warm feeling.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: October 25, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroaki Yoshida, Shigeru Shirai, Masaaki Kawaguri, Kazushige Kawahara, Masaaki Inagi, Masaki Yamamoto, Hirofumi Gyokusen