Patents by Inventor Lucien Hervouin

Lucien Hervouin 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).

  • Plug for an opening providing an inspection X-ray source with access to pipework or to an apparatus
    Patent number: 4858652
    Abstract: A plug for an opening providing an inspection X-ray source with access to pipework or to an apparatus made of a high strength steel alloy which is fragile in welding, the plug comprising an open ended cylindrical component (6) which is welded (8) to the wall of the pipework or the apparatus, and which projects therefrom, said component being made of the same steel as the pipework or the apparatus, and a second cylindrical component (9) for closing the bore through the first component. The second cylindrical component is fixed to the outer end of the first component and in line therewith by means of a butt weld (10).
    Type: Grant
    Filed: August 23, 1988
    Date of Patent: August 22, 1989
    Assignee: Societe Anonyme dite: Stein Industrie
    Inventors: Jacques Bobichon, Lucien Hervouin, Gilbert Vigneron