Patents by Inventor Etsuryo Kita

Etsuryo Kita 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).

  • Closed vessel for radioactive substance, seal-welding method for closed vessel, and exhaust system used for seal-welding method
    Patent number: 6990166
    Abstract: A primary lid is set in a top opening of a vessel body that contains radioactive substance, and closes the top opening. The peripheral edge portion of the primary lid is welded to the inner peripheral surface of the vessel body. As the primary lid is welded, steam in the vessel body is discharged to the outside through a discharge hole in the primary lid, and a shield gas is filled into or run through a space in the outer peripheral portion of the primary lid, so as to prevent the steam from flowing into the welding portion.
    Type: Grant
    Filed: September 4, 2003
    Date of Patent: January 24, 2006
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kenichi Matsunaga, Ganji Abe, Kazuo Murakami, Koichi Ue, Takashi Shige, Etsuryo Kita, Shizuo Inoue, Tsuneo Mandai
  • CLOSED VESSEL FOR RADIOACTIVE SUBSTANCE, SEAL-WELDING METHOD FOR CLOSED VESSEL, AND EXHAUST SYSTEM USED FOR SEAL-WELDING METHOD
    Publication number: 20050105673
    Abstract: A primary lid is set in a top opening of a vessel body that contains radioactive substance, and closes the top opening. The peripheral edge portion of the primary lid is welded to the inner peripheral surface of the vessel body. As the primary lid is welded, steam in the vessel body is discharged to the outside through a discharge hole in the primary lid, and a shield gas is filled into or run through a space in the outer peripheral portion of the primary lid, so as to prevent the steam from flowing into the welding portion.
    Type: Application
    Filed: September 4, 2003
    Publication date: May 19, 2005
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kenichi Matsunaga, Ganji Abe, Kazuo Murakami, Koichi Ue, Takashi Shige, Etsuryo Kita, Shizuo Inoue, Tsuneo Mandai
  • Transportation vessel for radioactive substance and method of loading closed vessel
    Patent number: 6727510
    Abstract: A canister containing spent fuel assemblies is contained in a body of a transportation cask. A top opening of a vessel body of the canister is closed by a lid welded to the vessel body. A ring-shaped elastic tube is provided between the inner surface of the upper end portion of the body and the outer surface of the upper end portion of the vessel body. The tube seals the gap between these surfaces to prevent a fluid from getting into the gap between the surfaces through the top opening of the body. An inspection space for the insertion of a tester for detecting the welding state of the lid is defined between the inner surface of the upper end portion of the body and the outer surface of the upper end portion of the vessel body.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: April 27, 2004
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kenichi Matsunaga, Genji Abe, Koichi Ue, Koji Enami, Seiichi Wakayama, Etsuryo Kita, Shizuo Inoue
  • Closed vessel for radioactive substance, seal-welding method for closed vessel, and exhaust system used for seal-welding method
    Patent number: 6671344
    Abstract: A primary lid is set in a top opening of a vessel body that contains radioactive substance, and closes the top opening. The peripheral edge portion of the primary lid is welded to the inner peripheral surface of the vessel body. As the primary lid is welded, steam in the vessel body is discharged to the outside through a discharge hole in the primary lid, and a shield gas is filled into or run through a space in the outer peripheral portion of the primary lid, so as to prevent the steam from flowing into the welding portion.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: December 30, 2003
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kenichi Matsunaga, Ganji Abe, Kazuo Murakami, Koichi Ue, Takashi Shige, Etsuryo Kita, Shizuo Inoue, Tsuneo Mandai
  • Closed vessel for radioactive substance, seal-welding method for closed vessel, and exhaust system used for seal-welding method
    Publication number: 20030002614
    Abstract: A primary lid is set in a top opening of a vessel body that contains radioactive substance, and closes the top opening. The peripheral edge portion of the primary lid is welded to the inner peripheral surface of the vessel body. As the primary lid is welded, steam in the vessel body is discharged to the outside through a discharge hole in the primary lid, and a shield gas is filled into or run through a space in the outer peripheral portion of the primary lid, so as to prevent the steam from flowing into the welding portion.
    Type: Application
    Filed: June 25, 2002
    Publication date: January 2, 2003
    Inventors: Kenichi Matsunaga, Ganji Abe, Kazuo Murakami, Koichi Ue, Takashi Shige, Etsuryo Kita, Shizuo Inoue, Tsuneo Mandai
  • Transportation vessel for radioactive substance and method of loading closed vessel
    Publication number: 20030004390
    Abstract: A canister containing spent fuel assemblies is contained in a body of a transportation cask. A top opening of a vessel body of the canister is closed by a lid welded to the vessel body. A ring-shaped elastic tube is provided between the inner surface of the upper end portion of the body and the outer surface of the upper end portion of the vessel body. The tube seals the gap between these surfaces to prevent a fluid from getting into the gap between the surfaces through the top opening of the body. An inspection space for the insertion of a tester for detecting the welding state of the lid is defined between the inner surface of the upper end portion of the body and the outer surface of the upper end portion of the vessel body.
    Type: Application
    Filed: June 25, 2002
    Publication date: January 2, 2003
    Inventors: Kenichi Matsunaga, Genji Abe, Koichi Ue, Koji Enami, Seiichi Wakayama, Etsuryo Kita, Shizuo Inoue