Patents by Inventor Demeter Elek

Demeter Elek 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: 4496864
    Abstract: The invention refers to a brake electrical asynchronous motor with short-circuited rotor and double drive, where its magnetic field simultaneously generates both the revolving torque on the rotor, and the electromagnetical force for deblocking the brake.The motor, according to the invention, is characterized by a constructive system with a normal stack of statoric sheets, elongated by a supplementary stack of statoric sheets, having the same cross-geometry as the normal stack of statoric sheets, with an excitation winding common to both, a normal stack of rotoric sheets with the cage rods elongated into the area from under the supplementary stack of statoric sheets, and separated by stacks of teeth between which are created slots with the same shape with those in the area of the normal stack of statoric sheets, but opened towards the inside and short-circuited through these openings by the short-circuiting ring, located in this area.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: January 29, 1985
    Assignee: Research Institute for the Electrotechnical Industry--ICPE
    Inventors: Constantin Apetrei, Victor Nitigus, Demeter Elek, Marian Radulescu, Toma Sachelaire