Patents by Inventor Stig G. Andersson

Stig G. 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).

  • Device in a combined drill for simultaneously spreading seed and fertilizer
    Patent number: 4700640
    Abstract: The invention relates to a device in a combined drill for spreading seed and fertilizer simultaneously and comprising a container. The latter is divided by a wall into two compartments of which one is intended to take up the seed and the other to take up the fertilizer. The two compartments are connected by channels to drill coulters or spreaders for covering and spreading, respectively, of the two materials. The two openings of the container (11) are provided with swingable guide plates (30,31,36) to increase the size of the openings and thus make it possible to fill the container, for instance from a load vehicle.
    Type: Grant
    Filed: October 3, 1986
    Date of Patent: October 20, 1987
    Assignee: Aktiebolaget Overums Bruk
    Inventor: Stig G. Andersson