Patents by Inventor Takaji Kusakawa

Takaji Kusakawa 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).

  • Patent number: 4927467
    Abstract: A method for continuous production of thin plate ingot of phosphor bronze by quenching molten metal of bronze, wherein molten metal of phosphor bronze is quenched at a rate of from 10.sup.2 .degree. C./sec. to 10.sup.5 .degree. C./sec. to thereby solidify the same, and then the solidified metal is continuously cooled to a normal temperature to thereby obtain a microstructure having a crystal grain size of 50 .mu.m or below and in which appearance of the dendritic structure and the segregation layer is suppressed.
    Type: Grant
    Filed: February 10, 1988
    Date of Patent: May 22, 1990
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Takaji Kusakawa
    Inventors: Takaji Kusakawa, Katsuyoshi Wakamoto, Mitsuyuki Imaizumi
  • Patent number: 4790368
    Abstract: A wide thin metal sheet having a smooth surface may be manufactured directly from molten metal. A lower end of a nozzle installed vertically at the bottom of a molten metal vessel is held in contact with an inclined plate made of a refractory material, molten metal is discharged in a fan-shape from a notch formed in the peripheral wall of the nozzle end, the discharged molten metal being rendered into a constant shape laminar flow having a uniform flow rate distribution on the inclined surface as it flows down the inclined plate. The constant shape laminar flow is supplied to a molten metal pool between a pair of rollers of internally water-cooled type without any disturbance on the surface and in the inside. The metal solidified in the neighborhood of a portion of the gap between the two rollers is discharged from an open-at-the-bottom space defined between the two rollers.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: December 13, 1988
    Assignees: Nippon Yakin Kogyo Co. Ltd., Talako Kusakawa
    Inventors: Takaji Kusakawa, Kazuo Ebato, Takeya Tohge, Masato Noda, Yasuhide Kuroda