Patents by Inventor Jean-Francois Cretegny

Jean-Francois Cretegny 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 making tubes out of composite material having high tribological and mechanical characteristics
    Patent number: 6228444
    Abstract: A tubular structure comprising reinforcing fibers impregnated with a thermosetting polymer and a sheet of matrix material filled with an additive suitable for improving tribological and heat conductivity characteristics of the tubular structure. The reinforcing fibers alternate with the matrix material. The tubular structure is formed by winding the reinforcing fiber fabric and the matrix sheet material, wherein the fabric and the matrix sheet material have first and second ends and the first ends are located in the interior of the winding and the second ends are radially outwardly displaced from the first ends.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: May 8, 2001
    Assignee: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation
    Inventors: Peter Wolki, Emmanuel Edeline, Jean-Francois Cretegny
  • Apparatus for making tubes out of composite material having high tribological and mechanical characteristics
    Patent number: 5935378
    Abstract: A method of manufacturing a composite material in the form of an annular tube by winding on a mandrel both a reinforcing fiber fabric and a sheet of matrix material, comprising the following steps: 1) preheating the mandrel to a predetermined temperature; 2) fixing the reinforcing fiber fabric and the sheet of matrix material to the mandrel; 3) causing the mandrel to rotate at a nominal speed to wind the fabric and the sheet simultaneously, the fabric and the sheet being subjected to a nominal tension; 4) actuating heating means for heating the material and cooling means for cooling the mandrel; 5) when the tube reaches the desired diameter, stopping both the heating means and the rotation of the mandrel; 6) after a determined duration that is sufficient for bringing the temperature of the mandrel to the predetermined preheating temperature, stopping the cooling means; and 7) dismounting the mandrel.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: August 10, 1999
    Assignee: Societe Europeenne de Propulsion
    Inventors: Peter Wolki, Emmanuel Edeline, Jean-Francois Cretegny
  • Method of making tubes out of composite material having high tribiological and mechanical characteristics
    Patent number: 5665192
    Abstract: A method of manufacturing a composite material in the form of an annular tube by winding on a mandrel both a reinforcing fiber fabric and a sheet of matrix material, comprising the following steps: 1) preheating the mandrel to a predetermined temperature; 2) fixing the reinforcing fiber fabric and the sheet of matrix material to the mandrel; 3) causing the mandrel to rotate at a nominal speed to wind the fabric and the sheet simultaneously, the fabric and the sheet being subjected to a nominal tension; 4) actuating heating means for heating the material and cooling means for cooling the mandrel; 5) when the tube reaches the desired diameter, stopping both the heating means and the rotation of the mandrel; 6) after a determined duration that is sufficient for; bringing the temperature of the mandrel to the predetermined preheating temperature, stopping the cooling means; and 7) dismounting the mandrel.
    Type: Grant
    Filed: October 20, 1995
    Date of Patent: September 9, 1997
    Assignee: Societe Europeenne de Propulsion
    Inventors: Peter Wolki, Emmanuel Edeline, Jean-Francois Cretegny