Patents by Inventor Johann Gruntleitner

Johann Gruntleitner 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).

  • Reversible direct current motor with a permanent magnet rotor and electronic commutating device
    Patent number: 4292573
    Abstract: The polarity of the desired speed voltage of a speed control device and the commutation sequence of the current flowing in the stator windings are reversed for reversing an electronically commutated D.C. motor. A voltage, proportional to the EMF ad obtained from the motor voltage by I.times.R compensation, is used as the actual speed voltage for the speed control device, the polarity of the voltage proportional to the EMF being reversed when the direction of rotation signal changes.
    Type: Grant
    Filed: September 27, 1978
    Date of Patent: September 29, 1981
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hermann Ebert, Johann Gruntleitner, Hans Kuhnlein