Patents by Inventor Tsukio Ishitoya

Tsukio Ishitoya 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).

  • Fuel cell system, fuel cell valve system, and fuel cell gas supply device
    Patent number: 8053129
    Abstract: A fuel cell system includes a first shut valve capable of shutting off a gas flow in a gas path where a fuel cell gas flows; and a second shut valve arranged more towards the downstream side of the gas flow than the first shut valve, and capable of shutting off the gas flow. In each of the first shut valve and the second shut valve, sealing is performed by intimate contact between a movable member and a seal member and a gas pressure supplied from the upstream applies a force to the movable member to bring it into intimate contact with the seal member. A deformation degree by an external force of the same intensity is set greater in the seal member of the second shut valve than in the seal member of the first shut valve.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: November 8, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masahiro Takeshita, Tsukio Ishitoya
  • Fuel Cell System, Fuel Cell Valve System, and Fuel Cell Gas Supply Device
    Publication number: 20090169963
    Abstract: A fuel cell system includes a first shut valve capable of shutting off a gas flow in a gas path where a fuel cell gas flows; and a second shut valve arranged more towards the downstream side of the gas flow than the first shut valve, and capable of shutting off the gas flow. In each of the first shut valve and the second shut valve, sealing is performed by intimate contact between a movable member and a seal member and a gas pressure supplied from the upstream applies a force to the movable member to bring it into intimate contact with the seal member. A deformation degree by an external force of the same intensity is set greater in the seal member of the second shut valve than in the seal member of the first shut valve.
    Type: Application
    Filed: November 9, 2006
    Publication date: July 2, 2009
    Inventors: Masahiro Takeshita, Tsukio Ishitoya