Patents by Inventor Otto Buttner

Otto Buttner 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 of and apparatus for withdrawing liquid from a centrifuge
    Patent number: 5090953
    Abstract: A sensor is provided for the level of liquid or the surface characteristics of the solids and liquid layers in a centrifuge drum and controls a scoop by terminating the removal of the liquid when a surface-characteristic change representing the solids layer is reached or when the rate of change in the level within the drum approaches zero.
    Type: Grant
    Filed: November 27, 1990
    Date of Patent: February 25, 1992
    Assignee: Krauss-Maffei Aktiengesellschaft
    Inventors: Otto Buttner, Bruno Hegnauer