Patents by Inventor Kenya Yoshitomi

Kenya Yoshitomi 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).

  • Reversible variable-speed 2-phase electric motor
    Patent number: 4774448
    Abstract: A reversible variable-speed two-phase motor is disclosed. The motor comprises two sets of stator coils of equal impedance displaced in space by 90 degrees and transistor inverters to provide exciting current to the stator coils. The current supplied to one of the sets of stator coils is 90 degrees out of phase with the current supplied to the other set of stator coils, and the direction of the current in each set of stator coils reverses every 180 degrees so that a smoothly rotating magnetic field is produced. The motor can be operated as an induction motor or as a synchronous motor or as a direct current brake.
    Type: Grant
    Filed: December 19, 1984
    Date of Patent: September 27, 1988
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Kenya Yoshitomi