Patents by Inventor Michael Maelzer

Michael Maelzer 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).

  • Electronically commutated DC motor with shielding
    Patent number: 9673686
    Abstract: In an electronically commutated DC motor having a stator unit (5) and a rotor unit (1) which is in the form of an external rotor, and having stationary sintered bearings (8, 9), the invention proposes that the rotor unit (1) is conductively connected to the shaft (3) in order to connect a conductive shielding, which is formed on the rotor unit (1), to a defined electrical potential, and that the sintered bearing (8, 9) is conductively connected to the potential, so that the shielding of the rotor unit (1) is capacitively coupled to the potential by means of the electrically insulating, oil-filled bearing gap which is arranged between the shaft (3) and the sintered bearing (8, 9). Therefore, a sliding contact is not required.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: June 6, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Tobias Rothfuss, Michael Maelzer, Juergen Munz, Michael Hermann, Detlef Prahl, Siegmar Schoser, Joerg Brandes, Andreas Schiel, Tamas Banky, Zsolt Dudas
  • ELECTRONICALLY COMMUTATED DC MOTOR WITH SHIELDING
    Publication number: 20150171713
    Abstract: In an electronically commutated DC motor having a stator unit (5) and a rotor unit (1) which is in the form of an external rotor, and having stationary sintered bearings (8, 9), the invention proposes that the rotor unit (1) is conductively connected to the shaft (3) in order to connect a conductive shielding, which is formed on the rotor unit (1), to a defined electrical potential, and that the sintered bearing (8, 9) is conductively connected to the potential, so that the shielding of the rotor unit (1) is capacitively coupled to the potential by means of the electrically insulating, oil-filled bearing gap which is arranged between the shaft (3) and the sintered bearing (8, 9). Therefore, a sliding contact is not required.
    Type: Application
    Filed: April 29, 2013
    Publication date: June 18, 2015
    Inventors: Tobias Rothfuss, Michael Maelzer, Juergen Munz, Michael Hermann, Detlef Prahl, Siegmar Schoser, Joerg Brandes, Andreas Schiel, Tamas Banky, Zsolt Dudas