Patents by Inventor Gunter Erlenstaedt

Gunter Erlenstaedt 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).

  • Sifting machine
    Patent number: 3954604
    Abstract: A sifting machine having vibration generators connected to the opposite ends of a sieve screen, the vibration generators being so constructed as to vibrate one end of the sieve screen at a relatively low frequency and a relatively high amplitude and to vibrate the other end of the sieve screen at a relatively high frequency and a relatively low amplitude.
    Type: Grant
    Filed: August 9, 1971
    Date of Patent: May 4, 1976
    Assignee: "Rhewum" Rheinische Werkzeug- u. Maschinenfabrik GmbH
    Inventors: Rudolf Krause, Gunter Erlenstaedt