Patents by Inventor Leonid Donskoi

Leonid Donskoi 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).

  • Ultrasonic non-destructive testing device for welding beads
    Patent number: 4351190
    Abstract: An ultrasonic non-destructive testing device for welded seams on pipes and tubes comprises two test heads arranged opposite one another on a line normal to the welded seam. Each test head comprises a transducer element for longitudinal defects and two transducer elements for transverse defects. The transducer elements for transverse defects interact with transducer elements on the opposite side of the welded seam. The device allows the complete automatic testing of a welded seam from the beginning of the pipe to the end of the pipe for longitudinal and transverse defects.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: September 28, 1982
    Inventors: Wilfried Rehme, Anatoly Stipura, Victor Ripnyi, Leonid Donskoi, Nikolai Schevtschenko