Patents by Inventor Rolf Moren

Rolf Moren 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).

  • Percussive drilling apparatus
    Patent number: 6164392
    Abstract: A percussive drill for extension drilling includes a drill bit, a tube having a male screw thread attached to a female screw thread of the drill bit, and a rod having a male screw thread attached to a female screw thread of the tube. Central passages of the rod and tube are aligned with one another to conduct flushing fluid to the drill bit. The drill bit drills a hole whose diameter is from 60-170 mm and at least twice the outer diameter of the rod. A total area of a cross-sectional surface of the tube is within 100-125% of a total area of a cross sectional surface of the rod.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: December 26, 2000
    Assignee: Sandvik AB
    Inventors: Kenneth Larsson, Rolf Moren