Patents by Inventor Masamune HIRAKI

Masamune HIRAKI 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).

  • Fan motor
    Patent number: 9366262
    Abstract: A fan motor includes a motor; an impeller; a motor control board; an AC/DC converter board; electronic components mounted on the AC/DC converter board; and a housing arranged to contain the motor, the impeller, the motor control board, and the AC/DC converter board. The housing includes a base portion arranged to hold a stationary portion of the motor on an axially upper side thereof; and a case portion arranged to extend to assume a tubular shape on an axially lower side of the base portion. The AC/DC converter board is arranged in an interior space of the case portion. At least a portion of the interior space is filled with a resin material. Surfaces of the AC/DC converter board and the electronic components are covered with the resin material. The fan motor further includes a projecting portion arranged to project into the interior space.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: June 14, 2016
    Assignee: NIDEC CORPORATION
    Inventors: Yoshiaki Oguma, Masamune Hiraki, Ryota Hayashida, Makoto Kobayashi, Shinsuke Hamano
  • Fan system and electronic device
    Patent number: 8724320
    Abstract: A fan system includes a pulse signal generation portion and a plurality of fans. Each of the plurality of fans preferably includes a motor portion; an impeller arranged to be rotated by the motor portion; a drive circuit arranged to drive the motor portion; a rotation detection portion arranged to detect rotation of the motor portion; and a rotation rate control circuit arranged to, based on a reference pulse signal supplied from the pulse signal generation portion and an actual rotation pulse signal supplied from the rotation detection portion, exercise feedback control on a rotation rate of the motor portion in accordance with a period of the reference pulse signal.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: May 13, 2014
    Assignee: Nidec Corporation
    Inventors: George Harlan, Masayuki Kato, Hideyuki Takemoto, Masamune Hiraki
  • FAN SYSTEM AND ELECTRONIC DEVICE
    Publication number: 20120044644
    Abstract: A fan system includes a pulse signal generation portion and a plurality of fans. Each of the plurality of fans preferably includes a motor portion; an impeller arranged to be rotated by the motor portion; a drive circuit arranged to drive the motor portion; a rotation detection portion arranged to detect rotation of the motor portion; and a rotation rate control circuit arranged to, based on a reference pulse signal supplied from the pulse signal generation portion and an actual rotation pulse signal supplied from the rotation detection portion, exercise feedback control on a rotation rate of the motor portion in accordance with a period of the reference pulse signal.
    Type: Application
    Filed: January 26, 2011
    Publication date: February 23, 2012
    Applicant: NIDEC CORPORATION
    Inventors: George HARLAN, Masayuki KATO, Hideyuki TAKEMOTO, Masamune HIRAKI