Patents by Inventor Kazumichi Hata

Kazumichi Hata 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).

  • Gas-insulated switchgear apparatus and gas filter device
    Patent number: 7938895
    Abstract: A gas tank is hermetically filled with an insulating gas. A gas filling opening is provided on the gas tank, which includes a flange at its end. A gas filter device is fixed to the gas flange of the gas filling opening. The gas filter device includes a gas filter formed with a porous insulating material having pores with a diameter in a range from tens of micrometers to hundreds of micrometers. The gas filter has stability against the insulating gas and a decomposition product of the insulating gas.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: May 10, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masanori Osumi, Kazumichi Hata
  • Gas-insulated switchgear apparatus and gas filter device
    Patent number: 7931741
    Abstract: A gas tank is hermetically filled with an insulating gas. A gas filling opening is provided on the gas tank, which includes a flange at its end. A gas filter device is fixed to the gas flange of the gas filling opening. The gas filter device includes a gas filter formed with a porous insulating material having pores with a diameter in a range from tens of micrometers to hundreds of micrometers. The gas filter has stability against the insulating gas and a decomposition product of the insulating gas.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: April 26, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masanori Osumi, Kazumichi Hata
  • GAS-INSULATED SWITCHGEAR APPARATUS AND GAS FILTER DEVICE
    Publication number: 20100282714
    Abstract: A gas tank is hermetically filled with an insulating gas. A gas filling opening is provided on the gas tank, which includes a flange at its end. A gas filter device is fixed to the gas flange of the gas filling opening. The gas filter device includes a gas filter formed with a porous insulating material having pores with a diameter in a range from tens of micrometers to hundreds of micrometers. The gas filter has stability against the insulating gas and a decomposition product of the insulating gas.
    Type: Application
    Filed: July 22, 2010
    Publication date: November 11, 2010
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masanori Osumi, Kazumichi Hata
  • Gas-insulated switchgear apparatus and gas filter device
    Publication number: 20090166332
    Abstract: A gas tank is hermetically filled with an insulating gas. A gas filling opening is provided on the gas tank, which includes a flange at its end. A gas filter device is fixed to the gas flange of the gas filling opening. The gas filter device includes a gas filter formed with a porous insulating material having pores with a diameter in a range from tens of micrometers to hundreds of micrometers. The gas filter has stability against the insulating gas and a decomposition product of the insulating gas.
    Type: Application
    Filed: June 13, 2008
    Publication date: July 2, 2009
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masanori Osumi, Kazumichi Hata