Patents by Inventor Ryoji Iwakiri

Ryoji Iwakiri 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).

  • Tricycle with electric motor
    Patent number: 6104154
    Abstract: A tricycle with an electric motor in which two rear wheels 4 and 4 are driven by not only an electric motor 5, but also pedals 6 with manpower. A rotational force of the pedals 6 is transmitted to drive shaft 9 via first bevel gears 8a and 8b and then transmitted to a one-way clutch 7 via second bevel gears 10a and 10b from the drive shaft 9. The output of the one-way clutch 7 is then transmitted to the two rear wheels 4 and 4. The electric current to the electric motor is a pulse current and its pulse width is controlled to be shorted in relation to a braking operation.
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: August 15, 2000
    Assignee: Daiwa Sangyo Co., Ltd.
    Inventors: Tomitaro Harada, Ryoji Iwakiri, Ichiro Kagawa