Patents by Inventor Francois Joet

Francois Joet 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 installation for selective detection of defects in a workpiece
    Patent number: 4665734
    Abstract: For selective detection of microscopic defects in a workpiece to be checked presenting at least one macroscopic discontinuity of known nature, upon relative motion in respect to such workpiece according to a given check line, detecting the times when such check line meets a discontinuity, and searching for any possible defects in the workpiece intermittently for time intervals defined in reference to said times. This applies in particular to inspection of weld seams of welded tubes.
    Type: Grant
    Filed: April 3, 1985
    Date of Patent: May 19, 1987
    Assignee: S.A. Vallourec
    Inventor: Francois Joet