Patents by Inventor Hirotaka Toshima

Hirotaka Toshima 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).

  • Method for reducing high-load, low-speed wear resistance in sliding members
    Patent number: 5069874
    Abstract: Disclosed herein is a wear-resistance alloy comprising 10 to 40 wt % of Zn, 3 to 10 wt % of Al, 0.1 to 4 wt % of Cr and the balance Cu.
    Type: Grant
    Filed: October 10, 1990
    Date of Patent: December 3, 1991
    Assignee: Oiles Corporation
    Inventors: Takehiro Shirosaki, Takashi Kikkawa, Hirotaka Toshima
  • Wear-resistant copper alloy
    Patent number: 5000915
    Abstract: Disclosed herein is a wear-resistance alloy consisting essentially of about 10 to 40 wt % of Zn, about 3 to 10 wt % of Al, about 0.1 to 4 wt % of Cr, and optionally not more than about 8 wt % of Mn and not more than about 2 wt % of Ni, with the balance, Cu.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: March 19, 1991
    Assignee: Oiles Corporation
    Inventors: Takehiro Shirosaki, Takashi Kikkawa, Hirotaka Toshima
  • Wear-resistance aluminum bronze alloy
    Patent number: 4994235
    Abstract: Disclosed herein is a wear-resistance aluminum bronze alloy comprising 4 to 15 wt % of Al, 0.1 to 10 wt % of Cr and the balance Cu, and optionally containing not more than 6 wt % of Ni and not more than 15 wt % of Mn.
    Type: Grant
    Filed: November 3, 1989
    Date of Patent: February 19, 1991
    Assignee: Oiles Corporation
    Inventors: Takehiro Shirosaki, Takashi Kikkawa, Hirotaka Toshima