Patents by Inventor Akitaka Hidaka

Akitaka Hidaka 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).

  • Plant with piping mounted on branch pipe and boiling water reactor plant
    Patent number: 8971475
    Abstract: A plant with piping mounted on branch pipe, wherein said piping which introduces gas has a nozzle portion as a joint portion to a vessel and a branch portion connected with a branch pipe; and wherein an enlarged passage portion is formed at least at one of said branch portion and said nozzle portion, and a passage sectional area of said enlarged passage portion is larger than that of said piping other than said enlarged passage portion. Since the flow velocity of the gas flowing inside slows down at the enlarged passage portion, the occurrence of acoustic resonance at the branch portion or the nozzle portion can be suppressed. Accordingly, the fluctuation pressure of the gas flowing in the piping can be reduced even more.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: March 3, 2015
    Assignee: Hitachi-GE Nuclear Energy, Ltd.
    Inventors: Keita Okuyama, Shiro Takahashi, Masami Kato, Akitaka Hidaka
  • Plant with Piping Mounted on Branch Pipe and Boiling Water Reactor Plant
    Publication number: 20090296874
    Abstract: A plant with piping mounted on branch pipe, wherein said piping which introduces gas has a nozzle portion as a joint portion to a vessel and a branch portion connected with a branch pipe; and wherein an enlarged passage portion is formed at least at one of said branch portion and said nozzle portion, and a passage sectional area of said enlarged passage portion is larger than that of said piping other than said enlarged passage portion. Since the flow velocity of the gas flowing inside slows down at the enlarged passage portion, the occurrence of acoustic resonance at the branch portion or the nozzle portion can be suppressed. Accordingly, the fluctuation pressure of the gas flowing in the piping can be reduced even more.
    Type: Application
    Filed: May 28, 2009
    Publication date: December 3, 2009
    Inventors: Keita Okuyama, Shiro Takahashi, Masami Kato, Akitaka Hidaka