Patents by Inventor Didier Schaff

Didier Schaff 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).

  • Plasma torches
    Patent number: 4625094
    Abstract: This invention relates to plasma torches in which, the gas entering the electrode holder is divided into a plasmagenic gas flow and into a cooling gas flow by two series of openings drilled in one and the same metal element forming the electrode holder.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: November 25, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Gerard Marhic, Didier Schaff, Francis Remy
  • Arc working torches
    Patent number: 4555609
    Abstract: This invention relates to arc working torches.To prevent the operator from touching the live electrode, the free end of the torch is provided with a cowling formed by a protective skirt on the one hand and on the other hand by a tilting stirrup hinged on this skirt which engages on the torch body while closing an electrical circuit forming part of the safety circuit of the torch. The invention is applied to manual plasma cutting torches.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: November 26, 1985
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Gerard Marhic, Didier Schaff, Francis Remy