Patents by Inventor Dermot Clement Stobart

Dermot Clement Stobart 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).

  • Rotary boring bit and borer
    Patent number: 6454029
    Abstract: The invention concerns a rotary boring bit, typically for coal drilling applications. The bit (10) of the invention is in the form of a hardmetal blade and includes a cutting edge (18) having an outwardly projecting gable shaped cutting formation on either side of the intended axis of rotation (A). The bit has parallel side edges (14 and 16) which extend between the cutting edge (18) and the base of the bit. In the preferred bit, the apices of the cutting formations lie in a common plane normal to the axis of rotation (A) but are unequally spaced from the axis.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: September 24, 2002
    Inventors: Danie Johannes Loots, Dermot Clement Stobart