Patents by Inventor Lars G. A. Andersson

Lars G. A. Andersson 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).

  • Dynamic cone penetration device
    Patent number: 5616833
    Abstract: A dynamic cone penetration device for determining denseness of soil has reduced friction to provide more accurate testing. The device comprises a cone rod having a soil penetrating cone at one end and an anvil at the other end. The cone has a larger diameter than the cone rod, and the anvil has a striking surface for striking with a predetermined force. A rotation system containing a motor rotates the cone rod at a sufficient speed to reduce friction between the cone rod and the soil as the striking surface is struck.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: April 1, 1997
    Inventor: Lars G. A. Andersson