Patents by Inventor John R. Johansson

John R. Johansson 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).

  • Boom arrangement for dragline
    Patent number: 4167072
    Abstract: An excavating machine comprising a pivotal boom supporting at its outer end a drag bucket with the aid of a first line, and a bucket support arm articulated to the boom and a second line extending from said drag bucket to the outer end of the bucket support arm, whereby the drag bucket may be hauled close to the machine, irrespective of the height variations of the ground.
    Type: Grant
    Filed: March 3, 1977
    Date of Patent: September 11, 1979
    Assignee: Gravmaskinsbolaget John Johansson AB
    Inventor: John R. Johansson