Patents by Inventor Jun Yamagashi

Jun Yamagashi 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).

  • Linear motor
    Patent number: 4789815
    Abstract: A linear motor comprises a rail; a runner moved along the rail; a plurality of permanent magnets disposed in the rail along the longitudinal direction of the rail so as to alternately arrange the opposite polarities of the permanent magnets; coils disposed in the runner and arranged to oppose the permanent magnets; Hall elements disposed in the coils; and a control unit disposed in the runner and controlling an electric current supplied to the coils based on signals output from the Hall elements.
    Type: Grant
    Filed: July 14, 1987
    Date of Patent: December 6, 1988
    Assignee: Ohi Seisakusho Co., Ltd.
    Inventors: Fumio Kobayashi, Kunio Sakai, Jun Yamagashi