Patents by Inventor Hirohumi Mizusuna

Hirohumi Mizusuna 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).

  • Diamond sintered body having high strength and high wear-resistance and manufacturing method thereof
    Patent number: 5759216
    Abstract: A method of manufacturing a diamond sintered body includes the following steps: preparing a diamond powder having a particle size within a range of 0.1 to 10 .mu.m, coating the surface of each particle of the diamond powder with a sintering assistant agent including Pd within a range of 0.01 to 40 percent by weight and at least one iron family metal as a remainder, and liquid-phase sintering the coated diamond powder under a high pressure and high temperature condition. In this manner, a diamond sintered body having high strength and high wear-resistance, and containing diamond particles of 80 to 96 percent by volume, can be obtained.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: June 2, 1998
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yasuyuki Kanada, Hirohumi Mizusuna, Tsutomu Nakamura, Tetsuo Nakai