Patents by Inventor Jean Hamy

Jean Hamy 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).

  • Method and apparatus for the laser cutting of mild steel or structural steel with a multifocus optical component
    Patent number: 6521864
    Abstract: Method and apparatus for cutting a workpiece made of structural steel or mild steel, i.e. alloy or non-alloy steels, by the use of a transparent or reflecting optical unit for focusing a laser beam, and of an assist gas for the laser beam. The optical unit is of the multifocus type and is chosen from lenses, mirrors and combinations thereof. The assist gas is nitrogen or a nitrogen/oxygen mixture. The method of the invention makes it possible to obtain a low or almost zero oxidation of the cut face and to do so while increasing the cutting performance by about 40% compared with a laser cutting method using nitrogen or a nitrogen/oxygen mixture.
    Type: Grant
    Filed: January 8, 2001
    Date of Patent: February 18, 2003
    Assignee: L'Air Liquide Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et L'Exploitatiion des Procedes Georges Claude
    Inventors: Christophe Bertez, Jean Hamy, Olivier Matile
  • Method and apparatus for the laser cutting of mild steel or structural steel with a multifocus optical component
    Publication number: 20010019044
    Type: Application
    Filed: January 8, 2001
    Publication date: September 6, 2001
    Inventors: Christophe Bertez, Jean Hamy, Olivier Matile
  • Method and apparatus for the laser cutting of stainless steel, coated steel, aluminium or aluminium alloys with a bifocal optical component
    Publication number: 20010019043
    Abstract: Method and apparatus for cutting a workpiece made of stainless steel, coated steel, aluminum or aluminum alloy by the use of a transparent or reflecting optical means for focusing a laser beam and of an assist gas for said laser beam. The optical means is of the multifocus type and is chosen from lenses, mirrors and combinations thereof. The assist gas is oxygen or a nitrogen/oxygen mixture containing at least 90% nitrogen. The method of the invention makes it possible to increase the cutting performance by 40% compared with a conventional laser cutting method.
    Type: Application
    Filed: January 8, 2001
    Publication date: September 6, 2001
    Inventors: Christophe Bertez, Jean Hamy, Olivier Matile