Patents by Inventor Rikuhiro Hanai

Rikuhiro Hanai 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).

  • Automatic balancing apparatus, rotating apparatus, disc drive apparatus, balancer, and housing
    Patent number: 7882512
    Abstract: An automatic balancing apparatus is disclosed. The automatic balancing apparatus includes a housing, magnetic fluid, and a plurality of balancers. The housing is rotatable. The magnetic fluid is contained in the housing. Each of the plurality of balancers is movable in the housing and has a magnet and a yoke which is mounted thereto and which has a raised portion or a depressed portion formed on an inner circumferential side of a rotation of the housing.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: February 1, 2011
    Assignee: Sony Corporation
    Inventors: Rikuhiro Hanai, Takashi Mochida, Yuji Shishido
  • Automatic balancing apparatus, rotating apparatus, disc drive apparatus, and balancer
    Patent number: 7696655
    Abstract: An automatic balancing apparatus is disclosed. The automatic balancing apparatus includes a plurality of magnets, magnetic fluid, and a rotatable housing. The magnets function as balancers. The rotatable housing has a moving path disposed along a peripheral direction of the rotation. Each of the magnets is moved through the moving path. The rotatable housing accommodates the magnets and the magnetic fluid.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: April 13, 2010
    Assignee: Sony Corporation
    Inventors: Yuji Shishido, Takashi Mochida, Rikuhiro Hanai
  • AUTOMATIC BALANCING APPARATUS, ROTATING APPARATUS, DISC DRIVE APPARATUS, BALANCER, AND HOUSING
    Publication number: 20080095022
    Abstract: An automatic balancing apparatus is disclosed. The automatic balancing apparatus includes a housing, magnetic fluid, and a plurality of balancers. The housing is rotatable. The magnetic fluid is contained in the housing. Each of the plurality of balancers is movable in the housing and has a magnet and a yoke which is mounted thereto and which has a raised portion or a depressed portion formed on an inner circumferential side of a rotation of the housing.
    Type: Application
    Filed: October 23, 2007
    Publication date: April 24, 2008
    Applicant: SONY CORPORATION
    Inventors: Rikuhiro Hanai, Takashi Mochida, Yuji Shishido
  • Automatic balancing apparatus, rotating apparatus, disc drive apparatus, and balancer
    Publication number: 20070150910
    Abstract: An automatic balancing apparatus is disclosed. The automatic balancing apparatus includes a plurality of magnets, magnetic fluid, and a rotatable housing. The magnets function as balancers. The rotatable housing has a moving path disposed along a peripheral direction of the rotation. Each of the magnets is moved through the moving path. The rotatable housing accommodates the magnets and the magnetic fluid.
    Type: Application
    Filed: November 20, 2006
    Publication date: June 28, 2007
    Applicant: Sony Corporation
    Inventors: Yuji Shishido, Takashi Mochida, Rikuhiro Hanai