Patents by Inventor Tao Watanabe

Tao Watanabe 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).

  • Multiple air hammer apparatus and excavating direction correcting method therefor
    Publication number: 20010006120
    Abstract: Three air hammers are housed and arranged in a hammer case, and have bits at their respective ends. Each of the air hammers can be activated independently. In a normal excavation, the earth is excavated by activating all the air hammers. When correcting an excavating direction, only an air hammer positioned in the correct direction is activated first so that the earth in the correct direction is excavated in a predetermined amount. Next, all the air hammers are activated to excavate the earth. Thereby, a leading hammer can direct the excavation toward the correct direction, and thus the excavating direction is corrected.
    Type: Application
    Filed: November 30, 2000
    Publication date: July 5, 2001
    Inventors: Osamu Miyamoto, Yoshio Akiyama, Tao Watanabe