Patents by Inventor Ryoji Kasama

Ryoji Kasama 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).

  • Rotary electric machine rotor and a method of manufacturing the same
    Patent number: 4377762
    Abstract: A rotary electric machine rotor comprises a rotary shaft which is formed with a plurality of protuberances projecting beyond a basic circle and extending in a lengthwise direction, and a core which is made of a plurality of core segments smaller in deformation resistance than that of the rotary shaft. The rotary shaft is plastically pressed into the core and has an annular groove formed at a position of the rotary shaft somewhat inward of an end face of the core. The core is plastically deformed and a part of the core is filled fully in the annular groove while axially pressing the core.
    Type: Grant
    Filed: January 7, 1981
    Date of Patent: March 22, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Hideo Tatsumi, Hisanobu Kanamaru, Akira Tohkairin, Moisei Okabe, Ryoji Kasama
  • Method of making rotor of rotary machines
    Patent number: 4339873
    Abstract: A rotor of a rotary machine, having a core member consisting of a plurality of hollow pieces, and a rotary shaft which is inserted and secured in a hollow portion of said core member, wherein annular grooves having ruggid bottom are formed in said rotary shaft at positions slightly inside the end surfaces of said core member, and portions of said core member are inserted in said grooves so that said rotary shaft and said core member are fastened together.
    Type: Grant
    Filed: February 27, 1980
    Date of Patent: July 20, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Hisanobu Kanamaru, Moisei Okabe, Hideo Tatsumi, Akira Tohkairin, Ryoji Kasama