Patents by Inventor Ryosuke Yagi

Ryosuke Yagi 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).

  • Publication number: 20080233450
    Abstract: A fuel cell includes: a membrane electrode assembly having: an electrolyte membrane, anode and cathode catalyst layers, and anode and cathode gas diffusion layers; a cathode porous body provided at an outer side of the cathode gas diffusion layer; and a cathode member provided at an outer side of the cathode porous body, an inner side of the cathode member having a protruded portion facing to the outer side of the cathode porous body, wherein a pressure is applied to the cathode porous body through the protruded portion of the cathode member so as to compress the cathode porous body.
    Type: Application
    Filed: March 6, 2008
    Publication date: September 25, 2008
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Ryosuke Yagi, Yuusuke Sato, Koichiro Kawano
  • Publication number: 20080138668
    Abstract: A direct methanol fuel cell includes: an electrolyte membrane; an anode catalyst layer provided on one side of the electrolyte membrane, the anode catalyst layer accelerating the reaction of methanol with water to produce proton, electron and carbon dioxide; a cathode catalyst layer provided on the other side of the electrolyte membrane, the cathode catalyst layer accelerating the reaction between the proton, the electron and oxygen to produce water; a dense water-repelling layer having water-repelling property provided on the opposite side of the anode catalyst layer to the electrolyte membrane, the dense water-repelling layer being formed by calcining a slurry containing carbon powder and water-repelling polymer and having a thickness of 100 ?m or more after calcination; and a porous gas-diffusing layer provided on the opposite side of the dense water-repelling layer to the anode catalyst layer.
    Type: Application
    Filed: September 20, 2007
    Publication date: June 12, 2008
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Masato Akita, Ryosuke Yagi, Yuusuke Sato, Eiichi Sakaue
  • Publication number: 20080075988
    Abstract: A fuel cell system includes a plurality of fuel cell stacks; a mixing tank in which a liquid fuel mixture is stored; a plurality of liquid feed pumps configured to feed the liquid fuel mixture to the fuel cell stacks; a switch unit configured to switch on and off of a load connected with the fuel cell stacks: and a controller configured to control a feed of the fuel mixture to the fuel cell stacks, according to an ambient temperature of the fuel cell stacks.
    Type: Application
    Filed: September 18, 2007
    Publication date: March 27, 2008
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takahiro SUZUKI, Masato Akita, Kei Matsuoka, Ryosuke Yagi, Akihiro Ozeki, Yuusuke Sato
  • Publication number: 20080070075
    Abstract: A fuel cell system includes a cell stack comprising a plurality of power generation cells, each including a first flow channel plate, a second flow channel plate, and a membrane electrode assembly; a first current collector configured to collect a current; a second current collector configured to collect a current; a third current collector configured to collect a current; a fourth current collector configured to collect a current from a downstream region in the second plate; and a controller.
    Type: Application
    Filed: March 15, 2007
    Publication date: March 20, 2008
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Ryosuke Yagi, Atsushi Sadamoto, Norihiro Tomimatsu, Yuusuke Sato
  • Publication number: 20070264548
    Abstract: In a power generation unit incorporated in a fuel cell system, a mixture fuel with a certain concentration is supplied to an anode, power is generated by electrochemical reaction between the anode and a cathode exposed to air, and a discharge liquid containing an unreacted mixture fuel is discharged from the anode. The power generation unit is connected to a fuel circulation path for circulating the discharge liquid to the anode. If a mixture fuel is low in pressure, a fuel supply unit supplies fuel to the fuel circulation path. The temperature of the power generation unit is controlled in accordance with the concentration of the mixture fuel supplied to the anode.
    Type: Application
    Filed: June 14, 2007
    Publication date: November 15, 2007
    Inventors: Ryosuke YAGI, Takahiro Suzuki, Yuusuke Sato, Eiichi Sakaue