Patents by Inventor Ralf Kankura

Ralf Kankura 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 for measuring the liquid level of an electrically conductive liquid
    Patent number: 4188826
    Abstract: The height of a body of electrically conductive liquid is measured by imming in the liquid an electrode forming an electrical resistance. The electrode is connected with two conductors electrically insulated from the liquid and tied, in turn, to an alternating-current source which is not connected to ground. The resulting network of electrode, conductors and alternating-current source forms an electrical circuit to which responds a device for measuring the potential difference which is a function of the liquid level between the potential of the liquid in a region outside the electrode-encircling stray current and a potential outside the electrode.
    Type: Grant
    Filed: May 18, 1978
    Date of Patent: February 19, 1980
    Assignee: Kernforschungsanlage Julich Gesellschaft mit beschrankter Haftung
    Inventors: Ralf Kankura, Jurgen Keck