Patents by Inventor Masahiro Tatsukawa

Masahiro Tatsukawa 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).

  • Electronic appliance and power conversion apparatus
    Patent number: 11195648
    Abstract: A heat sink 7A is disposed on a circuit board, an air duct is disposed on the heat sink, external cooling air is supplied by the fan attached to the sink air inlet of the heat sink and the air duct inlet of the air duct. Cooling air flowing out of the air duct outlet of the air duct comes into contact with the magnetic component mounted on the circuit board.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: December 7, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Shun Fukuchi, Masakazu Gekinozu, Takanori Shintani, Masahiro Tatsukawa, Masaki Sakuma
  • Current detector
    Patent number: 10175269
    Abstract: A current detector includes: a current detection unit including a plurality of cores made of magnetic material, in the plurality of penetration holes are penetrating through, respectively; a terminal block including a plurality of terminal connecting portions being arranged side by side in a direction perpendicular to an axial direction of the penetration holes, the terminal block being merged with the current detection unit; and a plurality of conductor bars, each having one end inserted into one of the penetration holes and another end connected to corresponding one of the terminal connecting portions.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: January 8, 2019
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Isao Oka, Takanori Shintani, Masahiro Tatsukawa
  • ELECTRONIC APPLIANCE AND POWER CONVERSION APPARATUS
    Publication number: 20180174731
    Abstract: A heat sink 7A is disposed on a circuit board, an air duct is disposed on the heat sink, external cooling air is supplied by the fan attached to the sink air inlet of the heat sink and the air duct inlet of the air duct. Cooling air flowing out of the air duct outlet of the air duct comes into contact with the magnetic component mounted on the circuit board.
    Type: Application
    Filed: February 20, 2018
    Publication date: June 21, 2018
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Shun Fukuchi, Masakazu Gekinozu, Takanori Shintani, Masahiro Tatsukawa, Masaki Sakuma
  • CURRENT DETECTOR
    Publication number: 20170343586
    Abstract: A current detector includes: a current detection unit including a plurality of cores made of magnetic material, in the plurality of penetration holes are penetrating through, respectively; a terminal block including a plurality of terminal connecting portions being arranged side by side in a direction perpendicular to an axial direction of the penetration holes, the terminal block being merged with the current detection unit; and a plurality of conductor bars, each having one end inserted into one of the penetration holes and another end connected to corresponding one of the terminal connecting portions.
    Type: Application
    Filed: March 24, 2017
    Publication date: November 30, 2017
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Isao OKA, Takanori Shintani, Masahiro Tatsukawa