Patents by Inventor Tetsuo Koito

Tetsuo Koito 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).

  • Reamer for pipe
    Patent number: 4516586
    Abstract: A reamer includes two reamer plates overlapping with each other. On the base and tip section of these plates, there is provided an adjustable part and both plates are coupled so as to be opened and closed while centering the adjustable part on the tip section. The adjustable part on the base section has an adjusting screw, an adjusting hole, and a screw rod that passes through the adjusting hole which is situated eccentrically to the adjusting screw. The direction in which the adjusting screw is fastened is coincident with the direction in which the reamer plate is closed.
    Type: Grant
    Filed: May 20, 1983
    Date of Patent: May 14, 1985
    Assignees: Yugen-gaisha Koito-Seisakusho, Yugen-gaisha Koito-Seimitsu, Yugen-gaisha Koito-Denki
    Inventors: Toshio Koito, Tetsuo Koito, Miyoko Koito