Patents by Inventor Keiji Yasunaga

Keiji Yasunaga 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).

  • ROLLING BEARING AND MANUFACTURING METHOD THEREOF
    Publication number: 20110152138
    Abstract: To provide a rolling bearing which is superior in preventing electrolytic corrosion, suitable for use in applications where torque reduction of the bearing is required by reducing an amount of lubricant used or by using a lubricant having a low viscosity, and has superior acoustic characteristics and durability, a rolling element according to the present invention is made of an alumina-zirconia composite material including an alumina component and either a zirconia component or a yttria-zirconia component containing 1.5 to 5 mol % of yttria, a mass ratio of the alumina component to the zirconia component or the yttria-zirconia component being 5:95 to 50:50.
    Type: Application
    Filed: May 21, 2010
    Publication date: June 23, 2011
    Applicant: NSK LTD.
    Inventors: Tsuyoshi Nakai, Keiji Yasunaga, Tomohiro Motoda, Yuichi Endo, Mamoru Aoki, Koji Ueda, Katsunori Yanase, Satoru Watanabe, Hiroshi Ishiwada, Shun Nishizeki, Norikazu Kitagawa