Patents by Inventor Shigekazu Yasuoka

Shigekazu Yasuoka 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: 20050100789
    Abstract: A nickel metal hydride storage battery including a positive electrode, a negative electrode including a hydrogen absorbing alloy, and an alkaline electrolyte, the hydrogen absorbing alloy containing at least a rare-earth element, magnesium, nickel and aluminum, and having an intensity ratio (IA/IB) of not smaller than 0.1 (where IA represents an intensity of the highest peak in a range of 2?=30°˜34° in an X-ray diffraction pattern using CuK?-radiation as the X-ray source and IB represents the intensity of the highest peak in a range of 2?=40°˜44° in an X-ray diffraction pattern using CuK?-radiation as the X-ray source), and the battery containing manganese in an amount of not greater than 1.0 wt % relative to the hydrogen absorbing alloy.
    Type: Application
    Filed: October 15, 2004
    Publication date: May 12, 2005
    Inventors: Tetsuyuki Murata, Shigekazu Yasuoka, Yoshifumi Magari, Tadayoshi Tanaka, Jun Ishida
  • Publication number: 20050056349
    Abstract: A hydrogen absorbing alloy for a negative electrode in which a layer having at least a 10 weight % oxygen concentration is formed on a surface of particles of the alloy, and the magnesium concentration of the layer is 3.0˜7.5 times as great as that in the central part of the particles where the oxygen concentration is less than 10 weight %.
    Type: Application
    Filed: September 10, 2004
    Publication date: March 17, 2005
    Inventors: Shigekazu Yasuoka, Jun Ishida
  • Publication number: 20040170896
    Abstract: A hydrogen absorbing alloy containing at least a rare-earth element, magnesium (Mg), nickel (Ni) and aluminum (Al), having an intensity ratio (IA/IB) of not smaller than 0.6 (where IA represents an intensity of the highest peak in a range of 2&thgr;=30°˜34° in the X-ray diffraction pattern using CuK&agr;-radiation as the X-ray source and IB represents the intensity of the highest peak in a range of 2&thgr;=40°˜44°), and not substantially including La as the rare-earth element.
    Type: Application
    Filed: February 27, 2004
    Publication date: September 2, 2004
    Inventors: Tetsuyuki Murata, Shigekazu Yasuoka, Jun Ishida
  • Publication number: 20040146782
    Abstract: An alkaline storage battery having a negative electrode made from a hydrogen absorbing alloy represented by the formula Ln1-xMgxNiy-aMa (where Ln is at least one element selected from rare earth elements, M is at least one element selected from the group consisting of Al, V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si and P, 0.05≦x<0.20, 2.8≦y≦3.9 and 0.10≦a≦0.50) and carbon as a conductive agent, a positive electrode of nickel hydroxide as an active material, and an alkaline electrolyte, and the alkaline storage battery contains not greater than 0.01 weight % of hydrogen or not greater than 0.13 weight % of water in the hydrogen absorbing alloy when the battery is activated and is discharged to 1.0 V at one hour rate (It).
    Type: Application
    Filed: January 16, 2004
    Publication date: July 29, 2004
    Applicant: SANYO Electric Co.
    Inventors: Shigekazu Yasuoka, Tetsuyuki Murata, Jun Ishida
  • Publication number: 20040134569
    Abstract: A hydrogen absorbing alloy represented by the formula Ln1−xMgxNiy−aAla (where Ln is at least one element selected from rare earth elements, 0.05≦x<0.20, 2.8≦y≦3.9 and 0.10≦a≦0.25) which is used for an alkaline storage battery.
    Type: Application
    Filed: December 24, 2003
    Publication date: July 15, 2004
    Inventors: Shigekazu Yasuoka, Jun Ishida, Tetsuyuki Murata, Hiroshi Nakamura
  • Patent number: 6645672
    Abstract: The present invention provides an alkaline storage battery excellent in both charge properties and discharge properties. A novel alkaline storage battery is provided comprising an active positive electrode material containing nickel hydroxide as a main component and an alkaline electrolyte containing at least Li+ and Na+, characterized in that the positive electrode contains Y and/or Y compound and the alkaline electrolyte has an Li+ content of from not lower than 0.1 to less than 1.0 N and an Na+ content of from 0.3 to 1.5 N.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: November 11, 2003
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Shigekazu Yasuoka, Yoshinori Yokoyama, Atsumu Imasato, Takaaki Ikemachi
  • Publication number: 20010044049
    Abstract: The present invention provides an alkaline storage battery excellent in both charge properties and discharge properties. A novel alkaline storage battery is provided comprising an active positive electrode material containing nickel hydroxide as a main component and an alkaline electrolyte containing at least Li and Na, characterized in that the positive electrode contains Y and/or Y compound and the alkaline electrolyte has an Li content of from not lower than 0.1 to less than 1.0 N and an Na content of from 0.3 to 1.5 N.
    Type: Application
    Filed: March 27, 2001
    Publication date: November 22, 2001
    Inventors: Shigekazu Yasuoka, Yoshinori Yokoyama, Atsumu Imasato, Takaaki Ikemachi
  • Patent number: 5674643
    Abstract: A non-sintered nickel electrode for use in alkaline storage cells includes an active material comprising a solid solution of nickel hydroxide mixed with manganese, the solid solution further incorporating one or more elements selected from a group consisting of cobalt, cadmium, calcium and magnesium; an active material comprising a solid solution of nickel hydroxide mixed with manganese and zinc, the solid solution further incorporating one or more elements selected from a group consisting of cobalt, cadmium, calcium and magnesium; or an active material comprising nickel hydroxide with manganese added thereto, some of which manganese is incorporated in a solid solution of nickel hydroxide and the rest of which manganese exists as liberated from the solid solution of nickel hydroxide.
    Type: Grant
    Filed: February 12, 1996
    Date of Patent: October 7, 1997
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Mutsumi Yano, Mitsuzo Nogami, Reizo Maeda, Mamoru Kimoto, Shigekazu Yasuoka, Katsuhiko Shinyama, Koji Nishio, Toshihiko Saito