Patents by Inventor Eitaro Koya

Eitaro Koya 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).

  • Heat-resistant, wear-resistant and high-strength Al-Si alloy, and cylinder liner employing same
    Patent number: 4959276
    Abstract: A heat-resistant, wear-resistant and high-strength Al-Si alloy, wherein(A) 3 to 5% by weight based on the total amount of the alloy of alumina particles having a maximum particle diameter of 30 .mu.m or less and an average particle diameter of 10 .mu.m or less and having shaped with no sharp edge and(B) 0.5 to 3% by weight based on the total amount of the alloy of graphite particles having a maximum particle diameter of 10 .mu.m or less as measured on a cross section of the Al-Si alloy structureare dispersed in a matrix consisting essentially of ingredients for an Al-Si alloy and having primary Si crystals, the sizes of the primary Si crystals being not larger than 10 .mu.m.
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: September 25, 1990
    Assignees: Sumitomo Electric Industries, Ltd., Honda Motor Co., Ltd.
    Inventors: Yoshitoshi Hagiwara, Eitaro Koya, Tetsuya Hayashi, Yoshinobu Takeda