Patents by Inventor Andreas Böhme

Andreas Böhme 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).

  • Electron source
    Patent number: 9552955
    Abstract: An electron source includes a plurality of electron emission cathodes and at least one control electrode. A gate current regulator is provided for regulation of current flowing through the at least one control electrode.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: January 24, 2017
    Assignees: SIEMENS HEALTHCARE GMBH, NURAY TECHNOLOGY CO, LTD.
    Inventors: Moritz Beckmann, Walter Beyerlein, Andreas Böhme, Yuan Cheng, Jens Fürst, Markus Hemmerlein, Houman Jafari, Jürgen Oelschlegel, Qi Qiu, Frank Sprenger
  • Method and apparatus for heating current control of a pulsed X-ray tube
    Patent number: 9265135
    Abstract: A method and an associated apparatus for controlling a heating current flowing through an emitter of a pulsed X-ray tube during pulse pauses are provided. The heating current is controlled by comparing a measured actual value of the heating current with a predefinable desired value of the heating current. A low-pass filtering of the actual value of the heating current is effected before the comparison. A time constant of the low-pass filtering is equal to a thermal time constant of the emitter. A correction of the actual value of the heating current is provided before the low-pass filtering by a first correction value. The first correction value is determined such that a tube current control during the pulses is not compensated for by the heating current control in the pulse pauses.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: February 16, 2016
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rudolf Auernhammer, Andreas Böhme, Johannes Walk
  • Method and Apparatus for Heating Current Control of a Pulsed X-Ray Tube
    Publication number: 20140192961
    Abstract: A method and an associated apparatus for controlling a heating current flowing through an emitter of a pulsed X-ray tube during pulse pauses are provided. The heating current is controlled by comparing a measured actual value of the heating current with a predefinable desired value of the heating current. A low-pass filtering of the actual value of the heating current is effected before the comparison. A time constant of the low-pass filtering is equal to a thermal time constant of the emitter. A correction of the actual value of the heating current is provided before the low-pass filtering by a first correction value. The first correction value is determined such that a tube current control during the pulses is not compensated for by the heating current control in the pulse pauses.
    Type: Application
    Filed: January 9, 2014
    Publication date: July 10, 2014
    Inventors: Rudolf Auernhammer, Andreas Böhme, Johannes Walk
  • ELECTRON SOURCE
    Publication number: 20120286692
    Abstract: An electron source includes a plurality of electron emission cathodes and at least one control electrode. A gate current regulator is provided for regulation of current flowing through the at least one control electrode.
    Type: Application
    Filed: November 7, 2011
    Publication date: November 15, 2012
    Inventors: Moritz BECKMANN, Walter BEYERLEIN, Andreas BÖHME, Yuan CHENG, Jens FÜRST, Markus HEMMERLEIN, Houman JAFARI, Jürgen OELSCHLEGEL, Qi QIU, Frank SPRENGER
  • Multicathode X-ray tube
    Patent number: 8295441
    Abstract: An improved x-ray tube that includes a plurality of cathodes in a region under vacuum is provided. Several wirelessly activatable elements, which are each assigned to a cathode or a group of cathodes, are arranged in the region under vacuum and make an electrically conducting connection of the cathode or the group of cathodes to a cathode control voltage line when receiving a control signal from outside of the region under vacuum. A system that includes the improved x-ray tube and several transmitter elements for the wireless activation of the wirelessly activatable elements is also provided.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: October 23, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Walter Beyerlein, Andreas Böhme, Markus Hemmerlein, Oliver Heuermann, Jürgen Oelschlegel, Peter Wehrle
  • MULTICATHODE X-RAY TUBE
    Publication number: 20100226479
    Abstract: An improved x-ray tube that includes a plurality of cathodes in a region under vacuum is provided. Several wirelessly activatable elements, which are each assigned to a cathode or a group of cathodes, are arranged in the region under vacuum and make an electrically conducting connection of the cathode or the group of cathodes to a cathode control voltage line when receiving a control signal from outside of the region under vacuum. A system that includes the improved x-ray tube and several transmitter elements for the wireless activation of the wirelessly activatable elements is also provided.
    Type: Application
    Filed: February 24, 2010
    Publication date: September 9, 2010
    Inventors: Walter Beyerlein, Andreas Böhme, Markus Hemmerlein, Oliver Heuermann, Jürgen Oelschlegel, Peter Wehrle