Patents by Inventor Jean-Pierre Schultz

Jean-Pierre Schultz 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).

  • Gas mixture and welding method
    Patent number: 4999474
    Abstract: Gas mixture suitable for MAG welding at a high current using a rod filled with non-alloyed or low alloy steels, comprises 20 to 65% argon, 5 to 20% helium, and at least 30% CO.sub.2.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: March 12, 1991
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Jean-Pierre Schultz, Jean Soler, Daniel Nicoud
  • Process for terminating closed through-hole plasma arc welding
    Patent number: 4885455
    Abstract: To terminate welding, the mean energy of the arc is first reduced to obtain plugging of the hole, then this energy is briefly increased before again being decreased. Application to plasma arc welding of carbon steels.
    Type: Grant
    Filed: August 18, 1988
    Date of Patent: December 5, 1989
    Assignee: l'Air Liquide, Societe Anonyme Pour l'Etude Et l'Exploitation des Procedes Georges Claude
    Inventors: Jean-Pierre Schultz, Eric Verna
  • Arc welding process and apparatus
    Patent number: 4107507
    Abstract: An arc welding process and apparatus utilising an electrode and a counter-electrode between which a column of plasma forms. A first unidirectional current source is located between the electrode and the counter-electrode, and a second unidirectional current source is located between the counter-electrode and the member to be welded. These two sources simultaneously pass the two unidirectional currents.
    Type: Grant
    Filed: June 3, 1974
    Date of Patent: August 15, 1978
    Assignee: L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Jean-Pierre Schultz, Francis Cuny, Daniel Payraudeau, Jean-Marie Tritz