Patents by Inventor Volkmar Listing

Volkmar Listing 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).

  • Patent number: 4719382
    Abstract: The invention generally concerns a DC motor with an armature, several poles and with field coils surrounding said poles. According to the instant invention, each pole includes two pole halves which are displaced from each other in the peripheral sense by a given distance. Pole halves belonging to a given pair are connected to each other by a common pole shoe so that each pole is approximately U-shaped in its radial cross-section with the legs of the U (the pole halves) pointing outwardly. Each pole half is individually surrounded by its own field coil. In general, the principle of the invention is that the pole of a classic DC motor is split in two and that the thus obtained pole halves are displaced symmetrically relative ends of the pole shoe. In this manner, a shorter yoke length Lj.sub.8, together with lower magnetomotive force in ampere-windings than in a classic DC motor are made possible. Furthermore, a lower coil resistance is obtained, i.e.
    Type: Grant
    Filed: May 22, 1986
    Date of Patent: January 12, 1988
    Inventor: Volkmar Listing