Patents by Inventor Chao-Hsiang Ku

Chao-Hsiang Ku 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).

  • Patent number: 5823275
    Abstract: A high-speed drill for rock stake engineering includes an outer tube and an inner tube fixed in the outer tube, and an annular space is formed by the outer and the inner tube for pressured air and water to flow down from a power shaft connected with an upper portion of the outer tube. An annular cushion block is connected with a bottom of the outer and the inner tube, having many through holes. Further, cutters are fixed under a bottom surface of the cushion block, rotating together with the outer tube rotated by the power shaft, cutting into rock and cooled and washed synchronously by the pressured air and water coming through the annular space down from the power shaft.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: October 20, 1998
    Inventors: Chun-Yi Ku, Chao-Hsiang Ku