Patents by Inventor Robert Piednoir

Robert Piednoir 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).

  • Device for the tight joining of two parts
    Patent number: 4427222
    Abstract: The invention relates to a device for the tight joining of two parts comprising tightening means of the screw-nut type compressing a gasket between the two parts.A compression part and an elastic O-ring constituted by an internal spring with contiguous turns, which is closed on itself and fitted into at least one envelope are placed between the tightening means and one of the parts in order to permit the tightening of the assembly by an auxiliary system, followed by the tensioning of the tightening means by elastic restoration of the ring after fitting tightening means and slackening or releasing the auxiliary system.Application to the joining of two pipes and to the sealing of a container by means of a plug.
    Type: Grant
    Filed: January 12, 1982
    Date of Patent: January 24, 1984
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Claude Abbes, Christian Rouaud, Robert Piednoir, Raymond De Villepoix