Patents by Inventor Wolfgang Lienert

Wolfgang Lienert 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).

  • Electromotive drive
    Patent number: 6661144
    Abstract: The aim is to improve the cooling of a self-ventilated electric motor (1). To this end, an electromagnetic speed limiting and governing device is provided between the motor shaft (3) and the fan wheel (2), the fan wheel, which is driven via an electromagnetic slip coupling (6, 10) in accordance with the motor speed, being mounted freely rotatably on the motor casing or on the motor bearing plate (5).
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: December 9, 2003
    Assignee: Siemens Aktiengesellschaft
    Inventors: Karl-Friedrich Diener, Hermann-Josef Conraths, Werner Hopf, Wolfgang Lienert, Ekkehard Pittius, Peter Seitz