Patents by Inventor Kenji Umei

Kenji Umei 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).

  • Machine part resistant to rolling friction
    Patent number: 5496651
    Abstract: A machine part comprises: a base part formed of a titanium alloy or an aluminum alloy and having a roughened surface of Ra 0.5 .mu.m or above and PPI.sub.50 or above; and a Ni--P electrodeposit layer formed over the surface of the base part by an electroplating process using a Ni--P plating bath containing a stress relaxing agent, and having a stress of 20 kgf/mm.sup.2 or below. The machine part has a small specific gravity, excellent seizure resistance, wear resistance and fatigue strength.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: March 5, 1996
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Hidetoshi Nishimoto, Yasuaki Sugizaki, Kenji Umei, Hiroshi Satoh, Yoshinori Terada, Tatsuya Yasunaga, Takenori Nakayama, Yasunori Wada, Keiji Ueda