Patents by Inventor Bernt Soren Liljekvist

Bernt Soren Liljekvist 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).

  • Roller cutter
    Patent number: 4004644
    Abstract: In the saddle structure of the improved drill bit cutter assembly of the invention both spaced-apart legs are provided with bores each extending through the leg to receive a clamping bolt. These bores extend in directions including between them an angle of up to 90.degree.. The shaft-receiving recess, between the legs, has a polygonal shape complementing that of the end portion of the shaft.
    Type: Grant
    Filed: January 27, 1976
    Date of Patent: January 25, 1977
    Assignee: Sandvik Aktiebolag
    Inventors: Bernt Soren Liljekvist, Anders Persson
  • Drill rod for percussion drilling
    Patent number: 3971447
    Abstract: Drill rod for percussion drilling comprising a central rod member and a sleeve member disposed therearound for a major portion of its length. An annular space is provided between said rod and sleeve members, said space being partially filled with one or several elements of noise-suppressing material, said elements when in plural being spaced from each other.
    Type: Grant
    Filed: December 3, 1974
    Date of Patent: July 27, 1976
    Assignees: Sandvik Aktiebolag, Atlas Copco Aktiebolag
    Inventors: Erik Ahlberg, Ingvar Carlvik, Bernt Soren Liljekvist, Anders Carl Gustaf Hagglund