Patents by Inventor Masaaki Koga

Masaaki Koga 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).

  • Casting aluminum alloy, cast compressor impeller comprising the alloy, and process for producing the same
    Patent number: 8292589
    Abstract: A casting aluminum alloy which contains, in terms of mass %, 3.2-5.0% Cu, 0.8-3.0% Ni, 1.0-3.0% Mg, 0.05-0.20% Ti, and up to 1.0% Si, the remainder being aluminum and incidental impurities. This casting aluminum alloy is used to produce a cast compressor impeller comprising a hub part, a hub-disk part extending from the hub part in the radial directions and having a hub surface and a disk surface, and blade parts disposed on the hub surface. Compared to conventional aluminum alloys, the casting aluminum alloy has a moderate elongation and a high strength at ordinary temperature and has high strength even at high temperatures.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: October 23, 2012
    Assignees: Hitachi Metals Precision, Ltd., Hitachi Metals, Ltd.
    Inventor: Masaaki Koga
  • CASTING ALUMINUM ALLOY, CAST COMPRESSOR IMPELLER COMPRISING THE ALLOY, AND PROCESS FOR PRODUCING THE SAME
    Publication number: 20090196762
    Abstract: A casting aluminum alloy which contains, in terms of mass %, 3.2-5.0% Cu, 0.8-3.0% Ni, 1.0-3.0% Mg, 0.05-0.20% Ti, and up to 1.0% Si, the remainder being aluminum and incidental impurities. This casting aluminum alloy is used to produce a cast compressor impeller comprising a hub part, a hub-disk part extending from the hub part in the radial directions and having a hub surface and a disk surface, and blade parts disposed on the hub surface. Compared to conventional aluminum alloys, the casting aluminum alloy has a moderate elongation and a high strength at ordinary temperature and has high strength even at high temperatures.
    Type: Application
    Filed: June 26, 2007
    Publication date: August 6, 2009
    Applicants: HITACHI METALS PRECISION , LTD., HITACHI METALS , LTD.
    Inventor: Masaaki Koga
  • Ferromagnetic metal powder and process for preparation thereof
    Patent number: 5028278
    Abstract: A ferromagnetic metal powder comprises a ferromagnetic metal particle composed mainly of iron, a silicon compound layer formed on the surface of the ferromagnetic metal particle in such an amount that the amount of silicon is 0.1 to 1% by weight based on iron in the ferromagnetic metal particle, and a layer containing a nonferrous transition metal element compound, which is formed on the silicon compound layer.
    Type: Grant
    Filed: December 20, 1989
    Date of Patent: July 2, 1991
    Assignee: KAO Corporation
    Inventors: Yasuo Kadono, Masaaki Koga, Yoshio Aoki
  • Ferromagnetic metal powder
    Patent number: 4920010
    Abstract: A ferromagnetic metal powder comprises a ferromagnetic metal particle composed mainly of iron, a silicon compound layer formed on the surface of the ferromagnetic metal particle in such an amount that the amount of silicon is 0.1 to 1% by weight based on iron in the ferromagnetic metal particle, and a layer containing a nonferrous transition metal element compound in an amount of from 2 to 15% by weight based on the weight of iron in said ferromagnetic particle which is formed on the silicon compound layer.
    Type: Grant
    Filed: September 2, 1988
    Date of Patent: April 24, 1990
    Assignee: Kao Corporation
    Inventors: Yasuo Kadono, Masaaki Koga, Yoshio Aoki