Patents by Inventor Matsuo Yamashita

Matsuo Yamashita 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).

  • Motor manufacturing method using single plate for yoke
    Patent number: 6594882
    Abstract: In a motor yoke manufacturing method, a flat metal plate is die-cut into a base plate for a yoke which comprises a bottom wall and a side wall. The base plate is plastically deformed to form a bearing accommodating holder and protrusions on the bottom wall. After a bearing member is placed in the bearing accommodating holder, a resilient plate is placed in contact with the bearing member and the protrusions are plastically deformed to tightly fix the resilient plate to the bottom wall. The base plate is plastically deformed to shape a generally bottomed cylindrical configuration of the yoke. Thus, the yoke is manufactured without a flushing process for removing machining oil or machining debris.
    Type: Grant
    Filed: November 10, 1999
    Date of Patent: July 22, 2003
    Assignee: Asmo Co., Ltd.
    Inventors: Fumihiro Tanida, Matsuo Yamashita, Kazuhiko Nagasaka