Patents by Inventor Richard M. Kolstad

Richard M. Kolstad 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).

  • Mobile tree removing apparatus
    Patent number: 4121777
    Abstract: A mobile tree removing apparatus includes an elongate extensible and retractable boom structure mounted on a vehicle such as a truck. A cutting device is mounted on the outer end of the boom structure and includes a housing having a plurality of cutting members positioned therein. Adjacent cutting members cooperate with each other to cut an entire standing tree including the trunk and limbs thereof into chips. The chips are impelled through a conduit connected to the housing by action of a vacuum pump mounted on a truck.
    Type: Grant
    Filed: September 15, 1977
    Date of Patent: October 24, 1978
    Inventors: Richard M. Kolstad, Robert V. Anderson