Patents by Inventor Eckhard Waschkies

Eckhard Waschkies 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: 7373822
    Abstract: A method for evaluating, during a welding process, a welded joint as it is forming between at least two parts of a joint using at least one ultrasonic transmitter sound penetrating the region of the forming welded joint with ultrasonic waves and at least one ultrasonic receiver, which registers the changes in sound transmittance of the ultrasonic waves penetrating the region of the forming welded joint in order to evaluate the welded joint. Sound is transmitted with longitudinal (l) and transverse (t) ultrasonic waves into the region of the welded joint, the time-dependent changes in sound transmittance Dl(t), Dt(t) of the longitudinal ultrasonic waves (l) and the transverse ultrasonic waves (t) being registered separately, and using the ratio of Dl(t) to Dt(t), the time point ts at which a molten mass forms in the region of the welded joint being determined and serving as a basis for evaluating the welded joint.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: May 20, 2008
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.
    Inventors: Brigitte Waschkies, legal representative, Eckhard Waschkies, incapacitated
  • Publication number: 20060260403
    Abstract: Disclosed is a method for evaluating, during a welding process, a welded joint as it is forming between at least two parts of a joint using at least one ultrasonic transmitter sound penetrating the region of the forming welded joint with ultrasonic waves and at least one ultrasonic receiver, which registers the changes in sound transmittance of the ultrasonic waves penetrating the region of the forming welded joint in order to evaluate the welded joint. The invention is distinguished by sound being transmitted with longitudinal (l) and transverse(t) ultrasonic waves into the region of the welded joint, the time-dependent changes in sound transmittance Dl(t), Dt(t) of the longitudinal ultrasonic waves (l) and the transverse ultrasonic waves (t) being registered separately, and using the ratio of Dl(t) to Dt(t), the time point ts at which a molten mass forms in the region of the welded joint being determined and serving as a basis for evaluating the welded joint.
    Type: Application
    Filed: December 11, 2003
    Publication date: November 23, 2006
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventor: Eckhard Waschkies
  • Patent number: 5920014
    Abstract: A process for on-line assessment of resistance weldings uses an ultrasonic source which impinges shear waves onto the weld region and an ultrasound receiver. The time at which the melting point of the weld material is reached and a weld nugget begins to form is determined from the output signal of the ultrasound receiver. The volume V of the weld nugget is calculated during the welding operation from the diminishment of shear waves after having reached the melting temperature.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: July 6, 1999
    Assignee: Fraunhofer -Gesellschaft Zur Forderung der Angewandten Forschung e.v.
    Inventor: Eckhard Waschkies
  • Patent number: 5159836
    Abstract: A process and device for monitoring the chip-removing treatment of a workce by analyzing the sound emission detectable on the tool which is transformed into an electrical signal, filtered, and compared with respect to its amplitude determined over a predetermined period of time with a predetermined adaptable threshold value. The constituents contained in the sound emission signal of the continuous basic noise signal resulting from the cutting and friction noise, and of the pulse-type chip-break signals superposed with respect to this with a higher amplitude, are separated and separately analyzed and evaluated.
    Type: Grant
    Filed: October 17, 1990
    Date of Patent: November 3, 1992
    Assignee: Fraunhofer-Gesellschaft zur Forderung Der Angewandten Forschung E.V.
    Inventors: Eckhard Waschkies, Klaus Hepp