Patents by Inventor Eike Wehrsdorfer

Eike Wehrsdorfer 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).

  • Method for the production of monolithic multilayer actuator monolithic multilayer actuator made of a piezoceramic or electrostrictive material and external electrical contact for a monolithic multilayer actuator
    Patent number: 7449077
    Abstract: The invention relates to a method for the production of a monolithic multilayer actuator, a corresponding monolithic multilayer actuator, as well as an external contact for a monolithic multilayer actuator. According to the invention specific microdisturbances are incorporated in the actuator structure along the longitudinal axis of the stack essentially parallel and spaced to the inner electrodes in the area of the at least two opposite outer surfaces to which the inner electrodes known per se are brought out, which at the earliest during polarisation of the actuator are subject to a pregiven, limited, stress-reducing growth into the interior and/or towards the outer electrode, wherein additionally the basic metallic coating and/or the external contact is formed elongation-resistant or elastic at least in the area of the microdisturbances.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: November 11, 2008
    Assignee: Pi Ceramic GmbH Keramische Technologien und Bauelemente
    Inventors: Astrid Heinzmann, Eberhard Hennig, Daniel Kopsch, Patrick Pertsch, Stefan Richter, Eike Wehrsdorfer
  • Method for the production of monolithic multilayer actuator monolithic multilayer actuator made of a piezoceramic or electrostrictive material and external electrical contact for a monolithic multilayer actuator
    Publication number: 20060055288
    Abstract: The invention relates to a method for the production of a monolithic multilayer actuator, a corresponding monolithic multilayer actuator, as well as an external contact for a monolithic multilayer actuator. According to the invention specific microdisturbances are incorporated in the actuator structure along the longitudinal axis of the stack essentially parallel and spaced to the inner electrodes in the area of the at least two opposite outer surfaces to which the inner electrodes known per se are brought out, which at the earliest during polarisation of the actuator are subject to a pregiven, limited, stress-reducing growth into the interior and/or towards the outer electrode, wherein additionally the basic metallic coating and/or the external contact is formed elongation-resistant or elastic at least in the area of the microdisturbances.
    Type: Application
    Filed: May 14, 2003
    Publication date: March 16, 2006
    Applicant: PI CERAMIC GMBH KERAMISCHE TECH, UND DAUELEMENTE
    Inventors: Astrid Heinzmann, Eberhard Hennig, Daniel Kopsch, Patrick Pertsch, Stefan Richter, Eike Wehrsdorfer
  • Spectrometer for measuring spatial distributions of paramagnetic centers in solid bodies
    Patent number: 4280096
    Abstract: A spectrometer is disclosed in which gradient coils are provided in order to create an inhomogeneous magnetic field for use in analyzing individual regions within the sample under examination. The gradient coils and the modulating coils are operated by discrete pulses, rather than continuously. A keying unit coordinates the interaction of the various components of the spectrometer in order to monitor resonance of the sample under examination while such pulses occur.
    Type: Grant
    Filed: November 7, 1978
    Date of Patent: July 21, 1981
    Assignee: Akademie der Wissenschaften der DDR
    Inventors: Wolfgang Karthe, Eike Wehrsdorfer