Patents by Inventor Jan E. Hemmelmann

Jan E. Hemmelmann 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).

  • VARIABLE-SPEED MAGNETIC COUPLING AND METHOD FOR CONTROL
    Publication number: 20120098374
    Abstract: An apparatus includes a first rotor operatively connected to an output shaft and holding a first array of pole pieces; a second rotor operatively connected to an input shaft coaxially with the first rotor and holding a second array of pole pieces; and an array of field windings disposed coaxially with the first and second rotors. The array of field windings being arranged to interact magnetically with a harmonic frequency of the magnetic field of the first or second array of pole pieces in a magnetically geared manner and being selectively energizable to control electromagnetic coupling of the first array of pole pieces with the second array of pole pieces, and thereby to transfer at least one of torque and speed from the input shaft to the output shaft.
    Type: Application
    Filed: October 25, 2010
    Publication date: April 26, 2012
    Inventors: Alvaro Jorge Mari Curbelo, Stefan Brandhoff, Robert J. Ciszak, Johannes Huber, Jan E. Hemmelmann, Michal-Wolfgang Waszak
  • FASTENERS WITH WELDED ULTRASONIC STRESS TRANSDUCERS
    Publication number: 20090206705
    Abstract: An apparatus and method of mounting a stress transducer to a fastener includes securing the transducer to a weld insert, and welding the insert to the fastener.
    Type: Application
    Filed: February 19, 2008
    Publication date: August 20, 2009
    Inventors: Jacob J. Nies, Jan E. Hemmelmann