Patents by Inventor Keijirou Amino

Keijirou Amino 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).

  • Magnet rotor, electromagnetic drive device and light quantity adjustment device using the magnet rotor
    Patent number: 7960876
    Abstract: A magnet rotor includes a drive arm with a rotary shaft, and an anisotropic permanent magnet having an axis of magnetization. The drive arm is composed of a light transmitting resin. The magnet has a cylindrical shape with a hollow center portion through which the rotary shaft is disposed. The drive arm and the permanent magnet are bonded together by a light curable resin adhesive.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: June 14, 2011
    Assignee: Nisca Corporation
    Inventors: Keijirou Amino, Akira Hakozaki, Katsura Nakajima
  • Manufacturing method of magnet rotor
    Patent number: 7685698
    Abstract: A magnet rotor includes a drive arm with a rotary shaft and a hollow cylindrical-shaped permanent magnet bonded by a light curable resin. The drive arm is composed of a light transmitting resin, and the permanent magnet is an anisotropic magnet with an axis of easy magnetization. During fabrication, the light curable resin is applied to the rotary shaft, and a hollow portion of the magnet is fitted to the rotary shaft. While holding the magnet in a position where a direction of the axis of easy magnetization corresponds to a magnetic field direction, the drive arm is irradiated with light to cure the resin and bond the drive arm and the permanent magnet.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: March 30, 2010
    Assignee: Nisca Corporation
    Inventors: Keijirou Amino, Akira Hakozaki, Katsura Nakajima
  • Magnet rotor, electromagnetic drive device and light quantity adjustment device using the magnet rotor
    Publication number: 20090195851
    Abstract: A magnet rotor includes a drive arm with a rotary shaft, and an anisotropic permanent magnet having an axis of magnetization. The drive arm is composed of a light transmitting resin. The magnet has a cylindrical shape with a hollow center portion through which the rotary shaft is disposed. The drive arm and the permanent magnet are bonded together by a light curable resin adhesive.
    Type: Application
    Filed: April 9, 2009
    Publication date: August 6, 2009
    Applicant: NISCA CORPORATION
    Inventors: Keijirou Amino, Akira Hakozaki, Katsure Nakajima
  • Manufacturing method of magnet rotor, magnet rotor manufactured by the method, electromagnetic drive device and light quantity adjustment device using the magnet rotor
    Publication number: 20060269281
    Abstract: A magnet rotor includes a drive arm with a rotary shaft and a hollow cylindrical-shaped permanent magnet bonded by a light curable resin. The drive arm is composed of a light transmitting resin, and the permanent magnet is an anisotropic magnet with an axis of easy magnetization. During fabrication, the light curable resin is applied to the rotary shaft, and a hollow portion of the magnet is fitted to the rotary shaft. While holding the magnet in a position where a direction of the axis of easy magnetization corresponds to a magnetic field direction, the drive arm is irradiated with light to cure the resin and bond the drive arm and the permanent magnet.
    Type: Application
    Filed: April 25, 2006
    Publication date: November 30, 2006
    Applicant: NISCA CORPORATION
    Inventors: Keijirou Amino, Akira Hakozaki, Katsura Nakajima