Patents by Inventor Takesi Akimoto

Takesi Akimoto 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).

  • Fixing structure for fixing rotor to rotor shaft, and turbo molecular pump having the fixing structure
    Publication number: 20070031270
    Abstract: Provided are a fixing structure for fixing a rotor to a rotor shaft, in which the contact state of the contact surfaces of the rotor shaft and the rotor is stabilized to thereby maintain the rotation balance of the rotor shaft and the rotor, making it possible to prevent oscillation, and a turbo molecular pump having such a fixing structure. On the outer peripheral portion of the upper surface of a fastening portion (253), there is concentrically formed a rotor shaft (213) side contact surface (257) to be brought into contact with a rotor (103). Further, in the inner periphery of the contact surface (257), there is formed a spot facing portion (259) whose upper surface is recessed from the contact surface (257).
    Type: Application
    Filed: August 27, 2004
    Publication date: February 8, 2007
    Applicant: BOC EDWARDS JAPAN LIMITED
    Inventors: Yasushi Maejima, Yutaka Inayoshi, Shinji Kawanishi, Kou Sakurai, Hiroyuki Suda, Takesi Akimoto