Patents by Inventor Yukio Hosotsubo

Yukio Hosotsubo 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).

  • Piston ring and thermal spray coating used therein, and method for manufacturing thereof
    Patent number: 7291384
    Abstract: The piston ring of the present invention comprises a thermal spray coating comprising chromium carbide particles having an average particle size of 5 ?m or less, and a matrix metal composed of a Ni—Cr alloy or a Ni—Cr alloy and Ni at least on an outer peripheral surface, said thermal spray coating having an average pore diameter of 10 ?m or less and a porosity of 8% or less by volume. A piston ring having excellent wear resistance, scuffing resistance and peeling resistance with little attackability on a mating member is obtained by forming a homogeneous thermal spray coating having a fine microstructure.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: November 6, 2007
    Assignee: Kabushiki Kaisha Riken
    Inventors: Ryou Obara, Katsumi Takiguchi, Yukio Hosotsubo