Patents by Inventor Hedwig Murmann-Biesenecker

Hedwig Murmann-Biesenecker 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).

  • Piezoactuator and method for production of the piezoactuator
    Patent number: 7309944
    Abstract: A piezoactuator, includes at least one stacked piezoelement, with at least two electrode layers, arranged one over the other along a stacking direction of the piezoelement, at least one piezoelectric layer, arranged between two of the electrode layers and at least one pre-tensioning device, for introduction of force into a volume of the piezoelectric layer via at least one force introduction surface on the piezoelectric layer, which is arranged on at least one of the surface sections facing the pretensioning device. The force introduction surface is smaller than the surface section of the piezoelectric layer and the volume is a partial volume of the piezoelectric layer. The production of the piezoactuator is achieved by introduction of a force into the partial volume of the piezoelectric layer via the force introduction surface on the piezoelectric layer.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: December 18, 2007
    Assignee: Siemens Aktiengesellschaft
    Inventors: Karl Lubitz, Hedwig Murmann-Biesenecker, Andreas Wolff
  • Piezoactuator and method for production of the piezoactuator
    Publication number: 20050258713
    Abstract: A piezoactuator, includes at least one stacked piezoelement, with at least two electrode layers, arranged one over the other along a stacking direction of the piezoelement, at least one piezoelectric layer, arranged between two of the electrode layers and at least one pre-tensioning device, for introduction of force into a volume of the piezoelectric layer via at least one force introduction surface on the piezoelectric layer, which is arranged on at least one of the surface sections facing the pretensioning device. The force introduction surface is smaller than the surface section of the piezoelectric layer and the volume is a partial volume of the piezoelectric layer. The production of the piezoactuator is achieved by introduction of a force into the partial volume of the piezoelectric layer via the force introduction surface on the piezoelectric layer.
    Type: Application
    Filed: July 31, 2003
    Publication date: November 24, 2005
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Karl Lubitz, Hedwig Murmann-Biesenecker, Andreas Wolff