Patents by Inventor Gerard Defay

Gerard Defay 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).

  • Metal workpiece obtained by oxygen cutting
    Patent number: 5683821
    Abstract: The workpiece is obtained by cutting a metal product by oxygen cutting. An oxygen cutting jet is sent onto a preheated cutting zone of the product. A peripheral sleeve of additional gas is formed around the oxygen cutting jet so as to send, into the cutting zone, a coaxial double jet constituted by the oxygen jet surrounded by the sleeve of gas at a pressure of less than 1 bar. The flow rate and the pressure of the cutting oxygen and of the additional gas are regulated separately. The invention also relates to an oxygen-cutting device for implementing the method and to the metal part obtained.
    Type: Grant
    Filed: March 12, 1996
    Date of Patent: November 4, 1997
    Assignee: Creusot-Loire Industrie
    Inventors: Dominique Vial, Gerard Defay, Michel Blanchet
  • Method of manufacturing a metal workpiece by oxygen cutting, oxygen-cutting device and metal workpiece obtained
    Patent number: 5391237
    Abstract: The workpiece is obtained by cutting a metal product by oxygen cutting. An oxygen cutting jet is sent onto a preheated cutting zone of the product. A peripheral sleeve of additional gas is formed around the oxygen cutting jet so as to send, into the cutting zone, a coaxial double jet constituted by the oxygen jet surrounded by the sleeve of gas at a pressure of less than 1 bar. The flow rate and the pressure of the cutting oxygen and of the additional gas are regulated separately. The invention also relates to an oxygen-cutting device for implementing the method and to the metal part obtained.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: February 21, 1995
    Assignee: Creusot-Loire Industrie
    Inventors: Dominique Vial, Gerard Defay, Michel Blanchet