Patents by Inventor Mark R. Petzoldt

Mark R. Petzoldt 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).

  • Vacuum seed metering assembly
    Patent number: 6564729
    Abstract: A vacuum seed metering assembly for evenly distributing seeds from a seed hopper includes a rotating perforated drum and a pair of stationary walls forming a suction area and a release area inside the drum. The suction area is adjacent a seed hopper such that individual seeds are held to apertures in the drum by suction as the apertures pass by the seed hopper. As the drum rotates, each seed is released into an associated distribution tube when the aperture passes into the release area.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: May 20, 2003
    Inventor: Mark R. Petzoldt