Patents by Inventor Takafusa Oosawa

Takafusa Oosawa 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).

  • Rotary damper
    Patent number: 5133433
    Abstract: A rotary damper has a hollow cylinder having upper and lower flanges to serve as a pivot. One arm is tightly fitted on one of the upper and lower flanges and extends essentially in a direction tangential to the associated flange. The other arm is pivotal with rotation of the outer pivot and extends essentially in a direction tangential to the outer pivot. A coil spring is wound around the outer periphery of the hollow cylinder. The ends of the coil spring are connected to the arms for exerting spring force in a direction opposite the pivoting direction of the arms.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: July 28, 1992
    Assignee: Nihon Plast Co., Ltd.
    Inventor: Takafusa Oosawa