Patents by Inventor Hans Leemann

Hans Leemann 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).

  • Apparatus for determining location of an element of magnetizable material in a construction structure
    Patent number: 5296807
    Abstract: An apparatus for locating magnetizable material (5, 6) within a structure (4) includes a scanning head (1) with a permanent magnet (28) for producing a magnetic field in the structure (4). Two field plates (30, 31), adjacent one another on only one pole face of the permanent magnet (28), are interconnected by a differential circuit and measure the magnetic field of the magnet disturbed by the magnetizable material (5, 6). The differential values measured by the pair of field plates form a differential measured signal for establishing, after differentiation, the location of the magnetizable material (5, 6) within the structure (4). The location of the magnetizable material (5, 6) within the structure can be shown on a monitor (7) of an evaluation unit (3).
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: March 22, 1994
    Assignee: Hilti Aktiengesellschaft
    Inventors: Heinz Kousek, Hansjorg Nipp, Otto Noser, Otmar Ganahl, Hans Leemann