Patents by Inventor Michel Jacson

Michel Jacson 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 unstressing pipe and the resulting pipe
    Patent number: 4156360
    Abstract: Circumferential stresses in tubes are relieved by exerting an axial pull on tube sufficient to elongate the tube at least 0.2%, and maintaining the pull on the tube for a predetermined period of time. The extent of elongation can be as much as 1% and the axial pull can be maintained for several minutes. The technique is particularly useful for substantially reducing or eliminating circumferential stresses in thin wall tubes which are created by straightening the tube with hyperbolic profile rollers.
    Type: Grant
    Filed: November 10, 1977
    Date of Patent: May 29, 1979
    Assignee: Vallourec (Usines a Tubes de Lorraine-escaut et Vallourec Reunies)
    Inventors: Michel Jacson, Pierre Huot