Patents by Inventor Leopold STEGFELLNER

Leopold STEGFELLNER 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).

  • Patent number: 10612108
    Abstract: A method for heating a blank or a preformed steel sheet component for hot forming and/or quench hardening purposes. In at least some regions, the heating is carried out to a temperature above AC3; the heating of the blank is embodied as a rapid heating and to this end, the blank is heated in a first zone at an average heating rate of >25 K/s up to about 600° C. and above this temperature, is heated at an average heating rate of >10 K/s up to a maximum of the AC3 temperature and then is transferred to a second zone in which the blank that has been preheated in the first zone is heated in at least some regions to temperatures greater than AC3, in particular >850° C., with the heating rate in the second zone being >10 K/s. The invention also relates to a device for carrying out the method.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: April 7, 2020
    Assignee: voestalpine Stahl GmbH
    Inventors: Michael Haslmayr, Siegfried Kolnberger, Thomas Kurz, Leopold Stegfellner, Andreas Sommer
  • Publication number: 20190039109
    Abstract: The invention relates to an apparatus for heating sheet steel blanks, in particular for shaping and hardening in a press hardening process, wherein there is a heating device, and the heating device includes at least one heating module; the at least one heating module has a boxlike element embodied in cassette-like fashion, which has a plate-shaped or rectangular cavity that has a flat plate on an underside; at least one heating element is positioned in the cavity, which element is embodied as an electrical resistance heating element, and the cavity is completely filled in an embedding fashion so that it is completely enclosed by a highly heat-conductive material, preferably copper, and relates to a method therefor.
    Type: Application
    Filed: February 3, 2017
    Publication date: February 7, 2019
    Inventors: MICHAEL HASLMAYR, ANDREAS SOMMER, REINER KELSCH, BENEDIKT TUTEWOHL, LEOPOLD STEGFELLNER
  • Patent number: 9903697
    Abstract: A method and an apparatus for the non-contact support of a sensor and/or actuator device with respect to a substrate which reflects sound at least in regions has a moving suspension device, a sensor and/or actuator device which is mechanically connected to the suspension device, and a positioning device which is mechanically connected to the suspension device and which has at least one non-contact bearing for the non-contact support of the sensor and/or actuator device with respect to the substrate. The positioning device has at least one sonotrode for emitting an ultrasonic field which, between the sonotrode and the substrate, forms acoustic levitation waves for the non-contact support of the sensor and/or actuator device with respect to the substrate by a non-contact bearing which is designed as an ultrasonic bearing.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: February 27, 2018
    Assignee: voestalpine Stahl GmbH
    Inventors: Norbert Gstoettenbauer, Leopold Stegfellner, Gunter Lengauer
  • Publication number: 20170218473
    Abstract: A method for heating a blank or a preformed steel sheet component for hot forming and/or quench hardening purposes. In at least some regions, the heating is carried out to a temperature above AC3; the heating of the Hank is embodied as a rapid heating and to this end, the blank is heated in a first zone at an average heating rate of >25 K/s up to about 600° C. and above this temperature, is heated at an average heating rate of >10 K/s up to a maximum of the AC3 temperature and then is transferred to a second zone in which the blank that has been preheated in the first zone is heated in at least some regions to temperatures greater than AC3, in particular >850° C., with the heating rate in the second zone being >10 K/s. The invention also relates to a device for carrying out the method.
    Type: Application
    Filed: July 21, 2015
    Publication date: August 3, 2017
    Inventors: Michael Haslmayr, Siegfried Kolnberger, Thomas Kurz, Leopold Stegfellner, Andreas Sommer
  • Publication number: 20160163307
    Abstract: A method and an apparatus for the non-contact support of a sensor and/or actuator device with respect to a substrate (2) which reflects sound at least in regions, in particular sheet metal, has a moving suspension device, a sensor and/or actuator device which is mechanically connected to the suspension device, and a positioning device which is mechanically connected to the suspension device and which has at least one non-contact bearing for the non-contact support of the sensor and/or actuator device with respect to the substrate. In order to ensure accurate positioning with respect to the substrate, the positioning device has at least one sonotrode for emitting an ultrasonic field which, between the sonotrode and the substrate, forms acoustic levitation waves for the non-contact support of the sensor and/or actuator device with respect to the substrate by a non-contact bearing which is designed as an ultrasonic bearing.
    Type: Application
    Filed: July 22, 2014
    Publication date: June 9, 2016
    Applicant: voestalpine Stahl GmbH
    Inventors: Norbert GSTOETTENBAUER, Leopold STEGFELLNER, Gunter LENGAUER