Patents by Inventor Nobuyuki Orihashi

Nobuyuki Orihashi 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).

  • Operation state determining apparatus and method for fuel cell
    Patent number: 7354668
    Abstract: An operation state determining apparatus for determining an operation state of a fuel cell battery formed by stacking a plurality of unit cells each having a construction in which a wet-state solid electrolyte membrane is sandwiched between an anode that is supplied with a fuel gas and a cathode that is supplied with an oxidizing gas is characterized by comprising: a voltage measuring portion that measures a voltage of at least one of the unit cells or a voltage of a unit cell stack formed by stacking a plurality of unit cells; and an operation state determining portion which determines that the operation state is a first operation state that is one of a low fuel gas state and a dried-up state if the voltage measured by the voltage measuring portion is within a predetermined inappropriate voltage range, and is below a predetermined voltage that is pre-set at a low value that is substantially impossible during a low oxidizing gas state and during a flooded state, and which determines that the operation state i
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: April 8, 2008
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Nobuyuki Orihashi, Masaaki Kondo
  • Operation state determining apparatus and method for fuel cell
    Publication number: 20040151956
    Abstract: An operation state determining apparatus for determining an operation state of a fuel cell battery formed by stacking a plurality of unit cells each having a construction in which a wet-state solid electrolyte membrane is sandwiched between an anode that is supplied with a fuel gas and a cathode that is supplied with an oxidizing gas is characterized by comprising: a voltage measuring portion that measures a voltage of at least one of the unit cells or a voltage of a unit cell stack formed by stacking a plurality of unit cells; and an operation state determining portion which determines that the operation state is a first operation state that is one of a low fuel gas state and a dried-up state if the voltage measured by the voltage measuring portion is within a predetermined inappropriate voltage range, and is below a predetermined voltage that is pre-set at a low value that is substantially impossible during a low oxidizing gas state and during a flooded state, and which determines that the operation state i
    Type: Application
    Filed: January 26, 2004
    Publication date: August 5, 2004
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Nobuyuki Orihashi, Masaaki Kondo