Patents by Inventor Sueji Nagayama

Sueji Nagayama 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).

  • Hand-held power tool with a mechanism
    Patent number: 4442878
    Abstract: A hand-held power tool, such as an electric planer or the like, comprises a mechanism for moving or forwarding the body of the tool in a straight hand path. The mechanism includes a rotary wheel or a plate attached to the tool body so that the rotary wheel or plate contacts the surface of a work piece when the tool body is placed thereon. The rotary wheel or the plate is made of a material having a high friction coefficient. A plurality of parallel grooves are formed on the surface of the rotary wheel or so that a high degree of friction occurs between the surface thereof and the surface of the work piece should the body move in a direction other than a given direction on the surface of the work piece. The rotary wheel or plate is biased toward the work piece with the biasing force applied to the rotary wheel being variable.
    Type: Grant
    Filed: August 4, 1981
    Date of Patent: April 17, 1984
    Assignee: Hitachi Koki Company, Limited
    Inventors: Seki Moriguchi, Katsuo Koizumi, Sueji Nagayama