Patents by Inventor Roland Kallvik

Roland Kallvik 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).

  • System, method and cutterhead for dry full-area drilling
    Patent number: 5803195
    Abstract: In a method for use in dry, rotary, crushing full-area drilling, use is made of suction air alone for removing cuttings produced during drillings. To carry out the method, two suction nozzles (13) are arranged on the underside of a cutterhead (1). These nozzles together have a substantially diametrical extent and the length of a radius on the cutterhead and are provided with suction intakes (14A) in the vicinity of the periphery of the cutterhead. The suction intakes (14A) are connectible a common suction channel (11) in the drill string (6) of the cutterhead. The suction channel (11) has substantially constant diameter.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: September 8, 1998
    Assignees: Kroll-Disab AB, Sandvik AB
    Inventors: Karl Thorbjorn Haugen, Gert Axel Lovgren, Stig-.ANG.ke Brolund, Roland Kallvik