Patents by Inventor André Mueller

André Mueller 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).

  • Speed monitoring device
    Patent number: 7378815
    Abstract: A device for redundant speed monitoring of a synchronous motor, which is sine-commutated without the use of sensors and which has a permanently magnetically excited rotor, has a first control unit, a drive output stage, a plurality of drive phases, and a second control unit for monitoring an electrical value of at least one of the drive phases and connected to the drive output stage for turning off the drive output stage when an improper speed state is detected.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: May 27, 2008
    Assignee: Pfeiffer Vacuum GmbH
    Inventors: Wolfgang Losch, André Mueller