Patents by Inventor Shigeo Wakamatsu

Shigeo Wakamatsu 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).

  • Gasket for fuel cell and method of forming it
    Patent number: 7063911
    Abstract: In a gasket used for a fuel battery, in order to solve problems with respect to making a seal portion thin, improving an assembling property, preventing a position shift, making a surface pressure low, making the surface pressure uniform, and the like, a gasket lip made of a liquid rubber hardened material is integrally formed on a surface of a flat plate made of a carbon, a graphite, a conductive resin such as a conductive phenol resin or the like, an ion exchange resin, or a metal such as a stainless steel, a magnesium alloy or the like, or on a groove portion applied to the surface.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: June 20, 2006
    Assignee: NOK Corporation
    Inventors: Osamu Nagai, Shigeo Wakamatsu, Yuichi Kuroki
  • Method of making a gasket for layer-built fuel cells
    Patent number: 6649097
    Abstract: A gasket is provided on a porous sheet in one body. The gasket is thin and has an excellent sealability, and processability when the gasket is built in layer-built fuel cells. The gasket is made of liquid rubber and has a hardness not more than 60 (JIS A). Liquid perfluoro rubber and liquid silicone rubber is preferably used for the gasket. And gasket can be made by injection molding.
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: November 18, 2003
    Assignee: Nok Corporation
    Inventors: Yasunori Sasaki, Kazuhisa Senda, Osamu Nagai, Shigeo Wakamatsu, Osamu Ando, Tasashi Fujimoto
  • Gasket for layer-built fuel cells and method for making the same
    Publication number: 20020045046
    Abstract: A gasket is provided on a porous sheet in one body. The gasket is thin and has an excellent sealability, and processability when the gasket is built in layer-built fuel cells The gasket is made of liquid rubber and has a hardness not more than 60 (JIS A). Liquid perfluoro rubber and liquid silicone rubber is preferably used for the gasket. And gasket can be made by injection molding.
    Type: Application
    Filed: October 19, 2001
    Publication date: April 18, 2002
    Applicant: NOK Corporation
    Inventors: Yasunori Sasaki, Kazuhisa Senda, Osamu Nagai, Shigeo Wakamatsu, Osamu Ando, Tadashi Fujimoto
  • Gasket for layer-built fuel cells and method for making the same
    Patent number: 6337120
    Abstract: A gasket is provided on a porous sheet in one body. The gasket is thin and has an excellent sealability, and processability when the gasket is built in layer-built fuel cells. The gasket is made of liquid rubber and has a hardness not more than 60 (JIS A). Liquid perfluoro rubber and liquid silicone rubber is preferably used for the gasket. And gasket can be made by injection molding.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: January 8, 2002
    Assignee: NOK Corporation
    Inventors: Yasunori Sasaki, Kazuhisa Senda, Osamu Nagai, Shigeo Wakamatsu, Osamu Ando, Tadashi Fujimoto
  • Gasket for fuel cell
    Patent number: 6231053
    Abstract: A gasket for fuel cells includes a gasket body composed of a metal or resin sheet and having openings, and a sealing section composed of a liquid rubber vulcanizate. The sealing section is bonded to the gasket body at low pressure. The inner face of each of the openings is covered with the sealing section. The gasket precludes generation of contaminants, such as ions, by the reaction of working fluids with the material constituting the gasket body, allowing high generating efficiency of the fuel cell.
    Type: Grant
    Filed: October 18, 1999
    Date of Patent: May 15, 2001
    Assignee: NOK Corporation
    Inventor: Shigeo Wakamatsu
  • Drilling machine
    Patent number: 4408934
    Abstract: A drilling machine for drilling a stack of paper, comprises a first movable member moving along directions to press the stack of paper and to remote from the stack of paper and elastically supporting a pressing plate, a second movable member supporting a drilling mechanism and moving along the directions, and a control device for causing first and second driving mechanisms simultaneously to drive the first and second movable members respectively in the direction to release the stack of paper from compression and to separate the drilling mechanism from the stack of paper, whereby the stack of drilled paper is released from compression and the drilling mechanism is separated from the stack of drilled paper.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: October 11, 1983
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Hiroshi Ohba, Shigeo Wakamatsu