Patents by Inventor Norman B. Wilcock

Norman B. Wilcock 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 device for locating the longitudinal axis of a branch pipe from a main pipe
    Patent number: 5150056
    Abstract: A method and device are shown for locating the longitudinal axis of a subterranean branch pipe from a main pipe. A magnetic field emitter is mounted in the branch pipe so that it radiates magnetic lines of force along the branch pipe and into the main pipe. The axis of the branch pipe is located by detecting the primary line of the magnetic flux emitted from the emitter using a location device which is moveable within the main pipe. By locating the axis of the branch pipe, a hole registering with the branch can be cut in a lining within the main pipe from which the branch pipe leads.
    Type: Grant
    Filed: February 7, 1991
    Date of Patent: September 22, 1992
    Inventor: Norman B. Wilcock