Patents by Inventor Tomoo Matsumura

Tomoo Matsumura 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).

  • Starter motor and process of forming pinion shaft used in the starter motor
    Patent number: 4896551
    Abstract: The starter motor includes a first output shaft with a pinion gear in mesh with a ring gear of an engine. A first reduction mechanism outputs power from a motor shaft through the first output shaft. A second output shaft and a second reduction mechanism output power from the first output shaft through the second output shaft. The second output shaft is rotatably coupled onto the first output shaft and made coaxial therewith. Power can be taken out on the side of the pinion gear. Both output shafts are associated with each other through a stop member for regulating relative displacement in the axial directions, so that thrusts in directions opposite to the above directions different from each other, which have not been borne, can be borne by each of the output shafts on the other side, respectively.
    Type: Grant
    Filed: March 11, 1988
    Date of Patent: January 30, 1990
    Assignee: Mitsuba Electric Manufacturing Co., Ltd.
    Inventors: Hideyuki Minami, Tomoo Matsumura, Takashi Yokozuka, Katsuo Takahara, Shigeru Okajima