Patents by Inventor Henri Diot

Henri Diot 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).

  • Shielding gas mixture and process for arc welding of stainless steel workpieces
    Patent number: 5739503
    Abstract: The shielding gas mixture for the TIG or GTAW arc welding of stainless steels, in particular of duplex or super duplex steels, comprises, in argon, from 3 to 18%, advantageously approximately 10%, of helium and from 1 to 3%, advantageously approximately 2%, of nitrogen. This gas mixture makes it possible to ensure good corrosion resistance of the metal deposited, acceptable solidity of the welds and excellent arc stability, as well as a suitable viscosity of the molten metal appropriate to manual welding in all positions.
    Type: Grant
    Filed: November 22, 1996
    Date of Patent: April 14, 1998
    Assignee: L'Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
    Inventors: Philippe Rouault, Henri Diot
  • Process and gaseous mixture for arc welding of aluminium components
    Patent number: 5667703
    Abstract: The arc welding, with a refractory electrode, using alternating current, is performed with a gaseous protective mixture including at the location of the weld, at least 50%, typically between 60 and 80% of helium and at least 300 vpm, typically between 400 and 800 vpm, of nitrogen, the remainder being argon.Application to manual or automatic welding of aluminium components.
    Type: Grant
    Filed: September 5, 1996
    Date of Patent: September 16, 1997
    Assignee: L'Air Liquide, Societe Anonyme pour L'Etude et L'Exploitation des Procedes Georges Claude
    Inventors: Richard Soula, Didier Marchand, Henri Diot
  • Process and gaseous mixture for arc welding of aluminium components
    Patent number: 5667702
    Abstract: The arc welding, with a refractory electrode, using alternating current, is performed with a gaseous protective mixture employing, at the location of the weld, at least 60%, typically between 70 and 80% of helium and more than 1000 vpm, typically between 1100 and 1200 vpm, of carbon dioxide, the remainder being argon.Application to manual or automatic welding of aluminium components.
    Type: Grant
    Filed: September 4, 1996
    Date of Patent: September 16, 1997
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Richard Soula, Didier Marchand, Henri Diot