Patents by Inventor Takahumi Hashimoto

Takahumi Hashimoto 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).

  • Patent number: 4306128
    Abstract: The invention disclosed a vacuum type electric circuit interrupter comprising a highly evacuated envelope which includes at least one metallic tube made of the magnetic material or the ferromagnetic material, a pair of relatively movable contacts disposed within said envelope in a location and means for eliminating the magnetodistortion of said metallic tube. This means comprises a magnetic flux generating member for supplying the magnetic flux to said metallic tube. The noise generated from the vacuum circuit interrupter is, accordingly, eliminated by means of a magnetic field applying member for applying previously the magnetic field to said metallic tube or by increasing the magnetic reluctance of the metallic tube.
    Type: Grant
    Filed: March 21, 1980
    Date of Patent: December 15, 1981
    Assignee: Kabushiki Kaisha Meidensha
    Inventors: Yoshiyuki Innami, Takahumi Hashimoto
  • Patent number: RE32440
    Abstract: .[.The invention disclosed a vacuum type electric circuit interrupter comprising a highly evacuated envelope which includes at least one metallic tube made of the magnetic material or the ferromagnetic material, a pair of relatively movable contacts disposed within said envelope in a location and means for eliminating the magnetodistortion of said metallic tube. This means comprises a magnetic flux generating member for supplying the magnetic flux to said metallic tube. The noise generated from the vacuum circuit interrupter is, accordingly, eliminated by means of a magnetic field applying member for applying previously the magnetic field to said metallic tube or by increasing the magnetic reluctance of the metallic tube..]. .Iadd.A vacuum type electric circuit interrupter comprises a highly evacuated envelope including at least one metallic tube made of magnetic or ferromagnetic material and a pair of relatively movable contacts disposed within the envelope.
    Type: Grant
    Filed: October 27, 1982
    Date of Patent: June 16, 1987
    Assignee: Kabushiki Kaisha Meidensha
    Inventors: Yoshiyuki Innami, Takahumi Hashimoto