Patents by Inventor Bernd Koehler

Bernd Koehler 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: 11300545
    Abstract: In the system, two ultrasonic transducers, which form a pair and each have a piezoelectric ceramic plate-shaped element with a rectangular geometry, can be fastened to a surface of a component. The two ultrasonic transducers are arranged at a distance from one another such that there is no direct mechanical contact and they are arranged beside one another with a parallel orientation of their central longitudinal axes. The two elements have a different polarization along their width and are connected with the same polarity to an electrical voltage source. The two plate-shaped elements can also have an identical polarization along their width and can be connected in this case with opposite polarity to an electrical voltage source. At least one ultrasonic transducer and/or at least one further ultrasonic transducer is/are designed to detect ultrasonic waves reflected by defects and/or shear waves simultaneously emitted by the two ultrasonic transducers.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: April 12, 2022
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Bianca Weihnacht, Tobias Gaul, Uwe Lieske, Lars Schubert, Bernd Koehler
  • Publication number: 20200363374
    Abstract: In the system, two ultrasonic transducers, which form a pair and each have a piezoelectric ceramic plate-shaped element with a rectangular geometry, can be fastened to a surface of a component. The two ultrasonic transducers are arranged at a distance from one another such that there is no direct mechanical contact and they are arranged beside one another with a parallel orientation of their central longitudinal axes. The two elements have a different polarization along their width and are connected with the same polarity to an electrical voltage source. The two plate-shaped elements can also have an identical polarization along their width and can be connected in this case with opposite polarity to an electrical voltage source. At least one ultrasonic transducer and/or at least one further ultrasonic transducer is/are designed to detect ultrasonic waves reflected by defects and/or shear waves simultaneously emitted by the two ultrasonic transducers.
    Type: Application
    Filed: May 13, 2020
    Publication date: November 19, 2020
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Bianca WEIHNACHT, Tobias GAUL, Uwe LIESKE, Lars SCHUBERT, Bernd KOEHLER
  • Patent number: 10379085
    Abstract: The invention relates to an assembly for nondestructive material testing with which shear waves are emitted and detected in elastic surfaces of components or workpieces, in which piezoelectric transducer elements are arranged above one another in multiple planes and the piezoelectric transducer elements arranged in adjacent planes can each be operated oppositely to one another. The piezoelectric transducer elements can be piezoelectric fibers and/or piezoelectric plate-like elements that are connected to or embedded in an elastically deformable material.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: August 13, 2019
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Bernd Koehler, Frank Schubert, Uwe Lieske
  • Publication number: 20170205374
    Abstract: The invention relates to an assembly for nondestructive material testing with which shear waves are emitted and detected in elastic surfaces of components or workpieces, in which piezoelectric transducer elements are arranged above one another in multiple planes and the piezoelectric transducer elements arranged in adjacent planes can each be operated oppositely to one another. The piezoelectric transducer elements can be piezoelectric fibers and/or piezoelectric plate-like elements that are connected to or embedded in an elastically deformable material.
    Type: Application
    Filed: May 26, 2015
    Publication date: July 20, 2017
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Bernd KOEHLER, Frank SCHUBERT, Uwe LIESKE
  • Publication number: 20160116442
    Abstract: The invention relates to a method of nondestructive and contactless testing of components (3), wherein ultrasonic waves (6) are irradiated onto the surface of the component (3) at a predefinable, non-perpendicular angle of incidence (9) using an ultrasonic transmission sound transducer (1) arranged spaced apart from the surface of the component (3) and the intensity of the ultrasonic waves (7) reflected from the surface of the component (3) is detected with time resolution and/or frequency resolution by the antenna array elements (2n) of an ultrasonic antenna array (2) configured for detecting ultrasonic waves (7) and the phase shift of the ultrasonic waves guided at the surface of the test body is determined therefrom with respect to the ultrasonic waves (7) directly reflected at the surface of the component (3).
    Type: Application
    Filed: November 23, 2015
    Publication date: April 28, 2016
    Applicants: Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V., MTU Aero Engines GmbH
    Inventors: Bernd KOEHLER, Martin BARTH, Joachim BAMBERG, Hans-Uwe BARON
  • Patent number: 9194844
    Abstract: The invention relates to a method of nondestructive and contactless testing of components (3), wherein ultrasonic waves (6) are irradiated onto the surface of the component (3) at a predefinable, non-perpendicular angle of incidence (9) using an ultrasonic transmission sound transducer (1) arranged spaced apart from the surface of the component (3) and the intensity of the ultrasonic waves (7) reflected from the surface of the component (3) is detected with time resolution and/or frequency resolution by the antenna array elements (2n) of an ultrasonic antenna array (2) configured for detecting ultrasonic waves (7) and the phase shift of the ultrasonic waves guided at the surface of the test body is determined therefrom with respect to the ultrasonic waves (7) directly reflected at the surface of the component (3).
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: November 24, 2015
    Assignees: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V., MTU AERO ENGINES GMBH
    Inventors: Bernd Koehler, Martin Barth, Joachim Bamberg, Hans-Uwe Baron
  • Patent number: 8696330
    Abstract: The invention relates to a reciprocating piston pump for delivering a liquid. The pump includes a solenoid with an actuator and an outlet port. A check valve with a seat body is assigned to the outlet port for keeping a return flow of the liquid out of the reciprocating piston pump. The seat body bears an impact damping face at a front face facing away from a valve seat of the check valve, and the valve seat of the check valve and the impact damping face are made from the same elastomer material.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: April 15, 2014
    Assignee: Thomas Magnete GmbH
    Inventors: Olaf Ohligschlaeger, Axel Mueller, Michael Mueller, Andreas Monzen, Stefan Quast, Bernd Koehler, Michael Feckler
  • Publication number: 20130111995
    Abstract: The invention relates to a method of nondestructive and contactless testing of components (3), wherein ultrasonic waves (6) are irradiated onto the surface of the component (3) at a predefinable, non-perpendicular angle of incidence (9) using an ultrasonic transmission sound transducer (1) arranged spaced apart from the surface of the component (3) and the intensity of the ultrasonic waves (7) reflected from the surface of the component (3) is detected with time resolution and/or frequency resolution by the antenna array elements (2n) of an ultrasonic antenna array (2) configured for detecting ultrasonic waves (7) and the phase shift of the ultrasonic waves guided at the surface of the test body is determined therefrom with respect to the ultrasonic waves (7) directly reflected at the surface of the component (3).
    Type: Application
    Filed: July 14, 2011
    Publication date: May 9, 2013
    Inventors: Bernd Koehler, Martin Barth, Joachim Bamberg, Hans-Uwe Baron
  • Publication number: 20100111728
    Abstract: The invention relates to a reciprocating piston pump for delivering a liquid. The pump includes a solenoid with an actuator and an outlet port. A check valve with a seat body is assigned to the outlet port for keeping a return flow of the liquid out of the reciprocating piston pump. The seat body bears an impact damping face at a front face facing away from a valve seat of the check valve, and the valve seat of the check valve and the impact damping face are made from the same elastomer material.
    Type: Application
    Filed: November 3, 2009
    Publication date: May 6, 2010
    Applicant: Thomas Magnete GmbH
    Inventors: Olaf Ohligschlaeger, Axel Mueller, Michael Mueller, Andreas Monzen, Stefan Quast, Bernd Koehler, Michael Feckler
  • Patent number: 6505393
    Abstract: An apparatus for riveting shell components to form a barrel-shaped structure such as an aircraft fuselage includes an outer part and an inner part that operate coordinated with each other under computer control. The outer apparatus part includes a riveting machine system movably carried on an annular machine guide that is supported on a stand that is movable in a length-wise X-direction. The inner apparatus part includes a multi-axis riveting robot mounted on a mounting frame that is movable along the X-direction. Instead of moving the inner and outer apparatus parts in the X-direction, it is alternatively possible to move the fuselage while keeping the apparatus parts stationary. A computer control unit provides control signals to achieve a coordinated and concurrent positioning of the inner and outer apparatus parts, and to carry out a coordinated sequence of riveting steps.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: January 14, 2003
    Assignee: Airbus Deutschland GmbH
    Inventors: Udo Stoewer, Bernd Koehler, Norbert Kosuch
  • Patent number: 6501355
    Abstract: A system includes a switching device, a sound device and an evaluation device. The switching device includes a housing and a contact system disposed in the housing, the contact system including a contact piece carrier and a contact piece disposed on the contact piece carrier. The sound device produces and captures structure-borne sound waves so as to determine an equivalent criterion for determining the remaining service life of the contact piece. The evaluation device evaluates the equivalent criterion.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: December 31, 2002
    Assignee: Moeller GmbH
    Inventors: Matthias Fenner, Frank Berger, Klaus-Jochen Froehlich, Bernd Koehler
  • Publication number: 20020158728
    Abstract: A system includes a switching device, a sound device and an evaluation device. The switching device includes a housing and a contact system disposed in the housing, the contact system including a contact piece carrier and a contact piece disposed on the contact piece carrier. The sound device produces and captures structure-borne sound waves so as to determine an equivalent criterion for determining the remaining service life of the contact piece. The evaluation device evaluates the equivalent criterion.
    Type: Application
    Filed: March 20, 2002
    Publication date: October 31, 2002
    Applicant: MOELLER GmbH
    Inventors: Matthias Fenner, Frank Berger, Klaus-Jochen Froehlich, Bernd Koehler
  • Patent number: D630399
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: January 4, 2011
    Assignee: Rowenta Werke GmbH
    Inventor: Bernd Koehler
  • Patent number: D649288
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: November 22, 2011
    Assignee: Calor
    Inventor: Bernd Koehler
  • Patent number: D667599
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: September 18, 2012
    Assignee: Calor
    Inventors: Bernd Koehler, Fabrice Renault
  • Patent number: D736998
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: August 18, 2015
    Assignee: CALOR
    Inventors: Bernd Koehler, Clement Martineau, Anthony Masson
  • Patent number: D770104
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: October 25, 2016
    Assignee: CALOR
    Inventor: Bernd Koehler
  • Patent number: D789010
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: June 6, 2017
    Assignee: Rowenta Werke GmbH
    Inventor: Bernd Koehler
  • Patent number: D789011
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: June 6, 2017
    Assignee: Rowenta Werke GmbH
    Inventor: Bernd Koehler
  • Fan
    Patent number: D846109
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: April 16, 2019
    Assignee: CALOR
    Inventor: Bernd Koehler