Patents by Inventor Takahiko Iochi

Takahiko Iochi 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).

  • Piezoelectric revolving resonator and single-phase ultrasonic motor
    Patent number: 5008581
    Abstract: A piezoelectric revolving resonator is disclosed in which a piezoelectric ceramic material in the form of a disk, a cylinder or a pipe is polarized so that two regions divided by its diameter are different in polarity from each other, and electrodes are provided to form equipotential surfaces on opposite principal surfaces and a resonant condition in which piezoelectric deformations are revolved is excited by a single-phase alternating current voltage. Due to the single-phase drive, the structures of the resonator and the drive circuit can be simplified.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: April 16, 1991
    Assignees: Hitachi Maxell, Ltd., Demix Technology Inc.
    Inventors: Akio Kumada, Takahiko Iochi, Minoru Okada