Patents Assigned to Trafimet SAS
  • Plasma-operated cutting torch with contact starting
    Patent number: 5164569
    Abstract: A plasma-operated cutting torch, has a diffusion chamber and a pressure chamber. A central shaft slidably supports an electrode in the diffusion chamber for contact with the nozzle. The central shaft has an annular collar slidable in the pressure chamber. Pressurized gas to be ionized flows into the pressure chamber and diffusion chamber which are always in open communication to the nozzle. The gas pressure against the collar forces the central shaft to move causing separation of the electrode away from the nozzle.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: November 17, 1992
    Assignee: Trafimet SAS
    Inventors: Diego Porra, Giuseppe Zigliotto