Patents by Inventor Guy Zacharie

Guy Zacharie 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 of repairing or protecting an end of a metal tube in a heat exchanger and sleeve for implementing same
    Patent number: 4960650
    Abstract: To repair a corroded region of the end of a heat exchanger tube, a sleeve is inserted, then expanded into the tube both in the area of the tube sheet and beyond the corroded area, then local welds are made in each of the expanded regions. Thereafter, the end of the sleeve is expanded against the tube in a region inside the tube sheet and above the local weld.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: October 2, 1990
    Assignees: Societe Anonyme, Electricite De France
    Inventors: Gilbert Vigneron, Jean Bezier, Thong Nguyen-Thanh, Pierre Vidal, Guy Zacharie, Lucien Guillemin
  • Structural parts of austenitic nickel-chromium-iron alloy
    Patent number: 4877465
    Abstract: A structural part for use in high temperature aqueous medium consists of an austenitic nickel-chromium-iron alloy containing by wt. 5 to 10% of iron, 18 to 20% of chromium and more than 60% of nickel. All components of the alloy, but chromium, may be in the standard ranges of well-known and proven alloys, typically 600 and X750 alloy.
    Type: Grant
    Filed: March 17, 1987
    Date of Patent: October 31, 1989
    Assignee: Electicite de France (Service National)
    Inventors: Jean R. Donati, Daniele Guttmann, Yves Rouillon, Pierre S. Paul, Guy Zacharie
  • Method for mechanical removal of tensile stresses in a tube which has been expanded in a support
    Patent number: 4134287
    Abstract: A tube which has been expanded in a support such as the tube-sheet of a heat exchanger is subjected to diametral deformation of controlled intensity and direction in the transition zone between the expanded portion of the tube and the portion which has a nominal diameter by means of an axially displaceable and radially expandable tool having a bullet-nosed shape or by means of a tube-expander of the type comprising a mandrel fitted with rollers or by means of a fluid under pressure.
    Type: Grant
    Filed: June 21, 1977
    Date of Patent: January 16, 1979
    Assignee: Electricite de France
    Inventors: Georges Le Huede, Guy Zacharie