Patents by Inventor Ulrike Martina Hoefer

Ulrike Martina Hoefer 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).

  • Vacuum pump
    Patent number: 8608459
    Abstract: A vacuum pump having a vacuum pumping mechanism mounted for rotation by a shaft and a brushless motor for rotating the shaft where the vacuum pumping mechanism comprises a turbo pumping mechanism comprising pumping stages, and a molecular drag pumping mechanism comprising at least one pumping stage, and a shaft supported for rotation by bearings, and where the motor comprises a permanent magnet rotor fixed relative to the shaft and the rotor has four poles and a stator has non-overlapping stator coils.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: December 17, 2013
    Assignee: Edwards Limited
    Inventors: Ulrike Martina Hoefer, Barrie Dudley Brewster, Andrew Waye
  • Vacuum pump
    Publication number: 20090162220
    Abstract: A vacuum pump having a vacuum pumping mechanism mounted for rotation by a shaft and a brushless motor for rotating the shaft where the vacuum pumping mechanism comprises a turbo pumping mechanism comprising pumping stages, and a molecular drag pumping mechanism comprising at least one pumping stage, and a shaft supported for rotation by bearings, and where the motor comprises a permanent magnet rotor fixed relative to the shaft and the rotor has four poles and a stator has non-overlapping stator coils.
    Type: Application
    Filed: December 11, 2008
    Publication date: June 25, 2009
    Inventors: Ulrike Martina Hoefer, Barrie Dudley Brewster, Andrew Waye