Patents by Inventor Tohru Houjyou

Tohru Houjyou 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).

  • Sealing structure of cell tube
    Patent number: 6562505
    Abstract: A sealing structure of a cell tube for a tubular type fuel cell has a sealed portion composed of a conductive lead film formed on a surface of a substrate tube, and an airtight film with high airtight properties formed on a surface of the lead film. The sealing structure also has an adhesion enhancing film provided on a surface of the airtight film, and a sealing member adhered to a surface of the adhesion enhancing film via an inorganic adhesive coated on the surface of the adhesion enhancing film. Thus, the sealability of the cell tube is increased, and the electrical characteristics of the fuel cell are improved.
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: May 13, 2003
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hiroshi Tsukuda, Nagao Hisatome, Yoshiharu Watanabe, Tohru Houjyou
  • Fuel cell having an air electrode with decreased shrinkage and increased conductivity
    Patent number: 6534211
    Abstract: A full cell comprising a fuel electrode and an air electrode disposed on side surfaces of an electrolyte film is disclosed. The fuel electrode is supplied with a fuel gas, and the air electrode is supplied with air. The air electrode has a close-packed structure in which the ratio between the average particle size of coarse particles and the average particular size of fine particles is from 5/1 to 250/1. The resulting fuel cell is increased in conductivity.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: March 18, 2003
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hiroshi Tsukuda, Nagao Hisatome, Yoshiharu Watanabe, Tohru Houjyou