Patents by Inventor Yoshiharu Aizawa

Yoshiharu Aizawa 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).

  • Pressure oil lend-in portion of hydraulic apparatus
    Patent number: 5228725
    Abstract: The oil tightness between a union and a seat portion on the outer side surface of a caliper is maintained by a copper packing. A rubber packing is provided on the outside of the copper packing so as to prevent water drops from adhering to the copper packing. As a result, copper ions never dissolves into the water drops, so that the aluminum caliper is prevented from corroding.
    Type: Grant
    Filed: December 10, 1991
    Date of Patent: July 20, 1993
    Assignee: Akebono Brake Industry Co., Ltd.
    Inventors: Shinji Aoyagi, Yoshiharu Aizawa