Patents by Inventor Werner Grabendorfer

Werner Grabendorfer 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 and apparatus for monitoring the operation of ultrasonic testing of tubes and bars
    Patent number: 4065960
    Abstract: This invention relates to immersion ultrasonic pulse-echo testing of tubes or bars for internal defects wherein means are provided to continuously monitor the operation of the test channel. As ultrasonic energy enters the workpiece, the round workpiece surface causes acoustic energy scatter responsive echo signals which are sensed by the transmitter probe, are amplified and applied to a threshold circuit. If the amplitude of the scatter responsive signal falls below a predetermined level, an output signal indicative of "loss of operation" is produced. Means are provided to inhibit such output signal in the event of only a momentary decrease of the scatter responsive signal below a predetermined value.
    Type: Grant
    Filed: December 13, 1976
    Date of Patent: January 3, 1978
    Assignees: Krautkramer GmbH, Mannesmann Aktiengesellschaft
    Inventors: Werner Grabendorfer, Herbert Vogt, Harri Haacke, Harry Kuhn, Reinhard Pawelletz, Karl Ries