Patents by Inventor Jan A. van Donkelaar

Jan A. van Donkelaar 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).

  • Patent number: 4151847
    Abstract: A device for removing attached parts from the stalk of a plant moving downstream along a feed path, and in particular a Brussel sprout plant comprising, an annular member rotatably mounted concentric of the feed path having a central opening through which the plant can pass, a plurality of cutting members pivotally mounted on the annular member in a plane perpendicular to the feed path and a knife portion with a cutting edge connected to each annular member. An electric motor is connected to the annular member for rotating it and causing the cutting members to pivot axially inwardly toward the feed path to cut the Brussel sprouts off the Brussel sprout stalk. The cutting edges of the knife portions are movable in a circular path concentric with the feed path and an opening device is connected to the cutting member for moving the knife portions with the cutting edges radially outwardly and increasing the radius of the circular path taken by the cutting edges.
    Type: Grant
    Filed: March 23, 1977
    Date of Patent: May 1, 1979
    Inventor: Jan A. van Donkelaar