Patents by Inventor Lauri C. Gregg

Lauri C. Gregg 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).

  • Method and apparatus for determining the profile of a subterranean passage
    Patent number: 4930595
    Abstract: A method and apparatus for remotely determining the profile of an inaccessible subterranean passage for example in a mine. An instrument pod is moved through the passage in steps. At each step, a rangefinder scans the wall of the passage and provides to a remote monitor, range measurements from which a profile can be determined. The pod also carries clinometers for determining the orientation of the pod during each profile measurement. The pod also carries a television camera and lights so that the wall of the passage can be visually inspected.
    Type: Grant
    Filed: October 14, 1987
    Date of Patent: June 5, 1990
    Assignee: Falconbridge Limited
    Inventors: Alan G. Hayward, Lauri C. Gregg, Aurele L. Dutrisac, Jack J. Joliat