Patents by Inventor Hirotaka Kameya

Hirotaka Kameya 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 of treating surfaces of rotors of the screw type rotary machine
    Patent number: 5223052
    Abstract: A method treating a surface of rotors in a screw-type rotary fluid machine, with the method comprising the steps of: conducting a non-electrolytic Ni plating on the surface of each rotor so as to form a first layer of non-electrolytic Ni plating layer; heating the rotor having the first layer at a temperature not lower than 500.degree. C.; and forming, at least, a second layer of an organic resin so as to cover the first layer.
    Type: Grant
    Filed: April 3, 1991
    Date of Patent: June 29, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Akihiko Yamamoto, Toshihiro Yamada, Tatsuo Natori, Kotaro Naya, Motohiro Satoo, Mitsuru Fujiwara, Katsumi Matsubara, Kazuaki Shiinoki, Hirotaka Kameya