Patents by Inventor Shigetaka Takeuchi

Shigetaka Takeuchi 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).

  • Long-sized tubular grounding container unit for gas-insulated electrical device and laser welding device for manufacturing the same
    Patent number: 5601735
    Abstract: A laser welding device for welding a long sized tubular grounding unit includes a work head arranged to rotate around an outer circumference of two tubular members to be welded, a laser oscillator, and apparatus to transmit the laser beam from the oscillator in sychronism with rotation of the work head. In one embodiment the apparatus to transmit the laser beam includes an optical fiber.
    Type: Grant
    Filed: April 13, 1993
    Date of Patent: February 11, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Hideo Kawamoto, Tokio Yamagiwa, Shinji Fukuda, Masayoshi Hashiura, Osamu Isshiki, Shigetaka Takeuchi, Masaki Murashita
  • Gas-insulated switchgear apparatus
    Patent number: 4745522
    Abstract: A gas insulated switchgear apparatus, in particular a phase-separated, double main bus-type switchgear apparatus, in which first and second phase-separated main buses are interchangeable and are arranged in horizontal planes in such a manner as to reduce the space needed for the apparatus.
    Type: Grant
    Filed: December 17, 1986
    Date of Patent: May 17, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Toshihide Mitomo, Satoshi Miwada, Shigetaka Takeuchi
  • Gas-insulated switchgear equipment
    Patent number: 4570202
    Abstract: A plurality of breaking portions forming a vertically-disposed circuit breaker are connected in series and open and close the circuit within a gas-tight sealed enclosure. The enclosure is provided at its both sides with openings for connection of one and the other ends of the breaking portions, to which openings main bus bars and an insulated-led-out device are connected, respectively. The breaking portions each have a fixed contactor and a movable contactor, and the movable contactor is put into contact with or is separated from the fixed contactor by moving the movable contactor upward or downward under control of an operating device.
    Type: Grant
    Filed: October 15, 1982
    Date of Patent: February 11, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Isao Nishida, Koji Sasaki, Seizo Nakano, Shigetaka Takeuchi, Takeshi Takahashi