Patents by Inventor Akihito GOHDA

Akihito GOHDA 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).

  • Method to prevent stress corrosion cracking of storage canister and storage canister
    Patent number: 9508459
    Abstract: A method to prevent stress corrosion cracking of a storage canister 1, wherein stress corrosion cracking is prevented by applying a compressive stress to a range where a tensile residual stress is generated on a metallic body 2 by welding a cover 4 to a top 2a of the body 2. A first compressive stress is applied beforehand to a range L of the body 2 where a tensile residual stress is expected to be generated by the welding of the cover 4, the tensile residual stress is canceled by welding the cover 4 with a compressive residual stress generated in the range L, and then a second compressive stress is applied so as to generate a compressive residual stress over the range L.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: November 29, 2016
    Assignees: HITACHI ZOSEN CORPORATION, CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY
    Inventors: Akikazu Kitagawa, Akio Ohiwa, Keisuke Okada, Katsunori Kusunoki, Tomohiro Tanaka, Akihito Gohda, Yasuhiro Fukai, Masanori Goto, Koji Shirai
  • METHOD TO PREVENT STRESS CORROSION CRACKING OF STORAGE CANISTER AND STORAGE CANISTER
    Publication number: 20160240275
    Abstract: A method to prevent stress corrosion cracking of a storage canister 1, wherein stress corrosion cracking is prevented by applying a compressive stress to a range where a tensile residual stress is generated on a metallic body 2 by welding a cover 4 to a top 2a of the body 2. A first compressive stress is applied beforehand to a range L of the body 2 where a tensile residual stress is expected to be generated by the welding of the cover 4, the tensile residual stress is canceled by welding the cover 4 with a compressive residual stress generated in the range L, and then a second compressive stress is applied so as to generate a compressive residual stress over the range L.
    Type: Application
    Filed: March 7, 2014
    Publication date: August 18, 2016
    Applicants: HITACHI ZOSEN CORPORATION, CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY
    Inventors: Akikazu KITAGAWA, Akio OHIWA, Keisuke OKADA, Katsunori KUSUNOKI, Tomohiro TANAKA, Akihito GOHDA, Yasuhiro FUKAI, Masanori GOTO, Koji SHIRAI