Patents by Inventor Anders T. Helgesson

Anders T. Helgesson 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 an apparatus for cross-cutting trees
    Patent number: 4250935
    Abstract: A method for cross-cutting trees, where a trunk to be cross-cut is advanced relative to a lopping means for cutting off branches on the trunk. A signal representing the lopping force required is generated and is combined with a signal representing advanced length of the trunk, so that a knot signal representing the presence of knots on the stem is obtained. Said knot signal is used for automatic control of the cutting of the trunk as a function of the presence of knots on the trunk. There is also provided an equipment for performing the method.
    Type: Grant
    Filed: November 30, 1978
    Date of Patent: February 17, 1981
    Assignee: Svenska Traforskningsinstitutet
    Inventors: Anders T. Helgesson, Gunnar B. Magnusson, Johan F. Sederholm