Patents by Inventor Yasuhiro Takarayama

Yasuhiro Takarayama 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).

  • Impact structure for impact power tool
    Patent number: 6223834
    Abstract: An impact structure for an impact power tool comprises: a hammer body rotatable by means of a driving actuator, and having at least one pawl member having an impact contacting area; and an operation body for rotating a bit for the impact power tool, having at least one wing member having an impact contacting area, which can be brought into contact with the impact contacting area of the pawl member. The operation body is rotated by intermittently hitting the pawl member of the hammer body against the wing member of the operation body in a rotational direction of the hammer body. The impact contacting area of the pawl member can be brought into point-contact or line-contact with the impact contacting area of the wing member.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: May 1, 2001
    Assignee: Ryobi Limited
    Inventors: Akio Takamura, Yasuhiro Takarayama, Kouki Morimoto