Patents by Inventor Takanobu Igarashi

Takanobu Igarashi 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).

  • Magnetic linear position sensor
    Patent number: 7268536
    Abstract: A magnetic linear position sensor comprises a first yoke which is made of soft magnetic material; a first magnet which is placed at the first yoke, and whose surface is the N-pole and is inclined; a second magnet which is placed at the first yoke, and whose surface is the S-pole and is inclined in a direction opposite to the surface of the first magnet and in a direction facing the surface of the first magnet; a second yoke which is placed at a position opposing the first magnet and the second magnet through an air gap and is made of soft magnetic material; and a magnetoelectric transducer which is placed in the air gap.
    Type: Grant
    Filed: January 6, 2005
    Date of Patent: September 11, 2007
    Assignee: Japan Servo Co., Ltd.
    Inventors: Hiroshi Hagino, Atushi Yamamoto, Takanobu Igarashi, Masahiro Horiguchi
  • Magnetic rotary position sensor
    Patent number: 7023202
    Abstract: The invention relates to a magnetic rotary position sensor that detects the absolute position of a rotation angle as an electric output in a non-contact state with magneto-electric transducers for converting a magnetic flux variation into a voltage. The magnetic rotary position sensor of the invention includes a cylindrical yoke, semi-cylindrical first and second magnets, and magneto-electric transducers. Here, the first and second magnets are disposed on the inside of the yoke to face to each other, and are magnetized in a manner that the N-pole and S-pole face to each other.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: April 4, 2006
    Assignee: Japan Servo Co., Ltd.
    Inventors: Hiroshi Hagino, Atushi Yamamoto, Takanobu Igarashi, Masahiro Horiguchi
  • Magnetic linear position sensor
    Publication number: 20050151535
    Abstract: A magnetic linear position sensor comprises a first yoke which is made of soft magnetic material; a first magnet which is placed at the first yoke, and whose surface is the N-pole and is inclined; a second magnet which is placed at the first yoke, and whose surface is the S-pole and is inclined in a direction opposite to the surface of the first magnet and in a direction facing the surface of the first magnet; a second yoke which is placed at a position opposing the first magnet and the second magnet through an air gap and is made of soft magnetic material; and a magnetoelectric transducer which is placed in the air gap.
    Type: Application
    Filed: January 6, 2005
    Publication date: July 14, 2005
    Inventors: Hiroshi Hagino, Atushi Yamamoto, Takanobu Igarashi, Masahiro Horiguchi
  • Magnetic rotary position sensor
    Publication number: 20050024045
    Abstract: The invention relates to a magnetic rotary position sensor that detects the absolute position of a rotation angle as an electric output in a non-contact state with magneto-electric transducers for converting a magnetic flux variation into a voltage. The magnetic rotary position sensor of the invention includes a cylindrical yoke, semi-cylindrical first and second magnets, and magneto-electric transducers. Here, the first and second magnets are disposed on the inside of the yoke to face to each other, and are magnetized in a manner that the N-pole and S-pole face to each other.
    Type: Application
    Filed: July 29, 2004
    Publication date: February 3, 2005
    Inventors: Hiroshi Hagino, Atushi Yamamoto, Takanobu Igarashi, Masahiro Horiguchi