Patents by Inventor Juergen Rohmann

Juergen Rohmann 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 detecting damage of a test specimen made of ferromagnetic material
    Patent number: 8717013
    Abstract: The device comprises a magnetization unit, which generates a constant magnetic field, to which the test specimen (12) is exposed so as to magnetize it. The magnetization unit and test specimen (12) carry out a relative motion to each other, thereby inducing eddy currents in the test specimen (12). The magnetization unit has at least one yoke (10) projecting in the direction of the relative motion. In addition to a probe (14), which is offset toward the back with respect to the magnetization unit in the direction of the relative motion and which is suited to detect damage based on the influence of the damage on the induced eddy current, the device comprises at least one further probe (16) between the yoke limbs of the magnetization unit.
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: May 6, 2014
    Inventor: Juergen Rohmann
  • DEVICE FOR DETECTING DAMAGE OF A TEST SPECIMEN MADE OF FERROMAGNETIC MATERIAL
    Publication number: 20110148406
    Abstract: The device comprises a magnetization unit, which generates a constant magnetic field, to which the test specimen (12) is exposed so as to magnetize it. The magnetization unit and test specimen (12) carry out a relative motion to each other, thereby inducing eddy currents in the test specimen (12). The magnetization unit has at least one yoke (10) projecting in the direction of the relative motion. In addition to a probe (14), which is offset toward the back with respect to the magnetization unit in the direction of the relative motion and which is suited to detect damage based on the influence of the damage on the induced eddy current, the device comprises at least one further probe (16) between the yoke limbs of the magnetization unit.
    Type: Application
    Filed: March 19, 2009
    Publication date: June 23, 2011
    Inventor: Juergen Rohmann
  • Method and device for detection and evaluation of surface damage to laid tracks and points components
    Publication number: 20030128030
    Abstract: The rails (10) or switch components are scanned with one or more eddy-current inspection probe(s) (20) and the measured signal of the probe(s) is plotted as a function of position. The probe(s) (20) is/are seated on a measuring head, which is guided along the rail (10). A GPS unit (26) equipped with a gyro module (32) is used as the position-signal generator.
    Type: Application
    Filed: December 30, 2002
    Publication date: July 10, 2003
    Inventors: Hartmut Hintze, Martin Junger, Volker Kiesow, Ronald Krull, Rainer Pohl, Juergen Rohmann, Sven Ruehe, Hans-Martin Thomas