Patents by Inventor Donald A. Desjardins

Donald A. Desjardins 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).

  • Roadbed profiler and method of profiling
    Patent number: 5390983
    Abstract: A hard surface roadbed profiler designed to perform a repetitive drill hole collaring cycle. By generating a series of interconnected collar holes, an extended flat surface is created. The profiler includes a movable percussive device mounted onto a chassis. A flat faced bit is attached to the percussive device to create the individual collars that are linked together to form a flat array.
    Type: Grant
    Filed: January 7, 1994
    Date of Patent: February 21, 1995
    Assignee: Inco Limited
    Inventors: Gregory R. Baiden, Donald D. Young, Donald A. Desjardins
  • Spherical bit
    Patent number: 4610317
    Abstract: A rotary bit having a pair of semi-spheres rotating about a shaft extending from a center tongue. The semi-spheres include a plurality of cutters arranged in a predetermined fashion to maximize cutting efficiency. The semi-spheres may be disposed slightly off-center from the bit's axis of symmetry to bias the bit in a particular direction.
    Type: Grant
    Filed: March 4, 1985
    Date of Patent: September 9, 1986
    Assignee: Inco Limited
    Inventors: John R. England, Donald A. Desjardins