Patents by Inventor Waldemar Meyer

Waldemar Meyer 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).

  • Method and a machine for advancing an underground face of a geological formation
    Patent number: 4008922
    Abstract: A method for driving tunnels in rounds is disclosed in which, after each round, the tunnel is left with an inclined transition to the floor. In the subsequent round, a cut is opened up in the transition towards the floor and the tunnel face is then stepwise drilled and blasted in cycles until the roof is reached and the round is completed. A machine for carrying out the method is disclosed which comprises a plurality of drill-and-blast units that are mounted on a frame that is pivotable about a transverse horizontal axis.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: February 22, 1977
    Assignee: Atlas Copco Aktiebolag
    Inventors: Karl Ake Kallin, Jan August Larcen, Waldemar Meyer