Patents by Inventor Bernard Lecerf

Bernard Lecerf 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 device for producing a textile web by spreading tows
    Patent number: 6836939
    Abstract: After yarns or tows (10) have been pre-spread and placed side by side substantially in a common plane, their surface is swept by at least one jet of air (22) displaced transversely relative to the longitudinal direction of the yarns or tows so as to obtain a substantially unidirectional sheet (20) that is uniform.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: January 4, 2005
    Assignee: SNECMA Propulsion Solide
    Inventors: Jean-Michel Guirman, Bernard Lecerf, Alain Memphis
  • Method and device for producing a textile web by spreading tows
    Publication number: 20030172506
    Abstract: After yarns or tows (10) have been pre-spread and placed side by side substantially in a common plane, their surface is swept by at least one jet of air (22) displaced transversely relative to the longitudinal direction of the yarns or tows so as to obtain a substantially unidirectional sheet (20) that is uniform.
    Type: Application
    Filed: February 27, 2003
    Publication date: September 18, 2003
    Inventors: Jean-Michel Guirman, Bernard Lecerf, Alain Memphis
  • Method for producing ring-shaped fibrous structures, in particular for making parts in composite material
    Patent number: 6319348
    Abstract: To make an annular fiber structure, a strip-shaped fabric (50), is used which is made up of two superposed unidirectional sheets, with the directions of the sheets forming opposite angles relative to the longitudinal direction of the strip, the two sheets being bonded together so as to form deformable elementary meshes, the fabric being wound while being deformed so as to transform it into a flat helix, the elementary meshes deforming in such a manner that variation in mass per unit area between the inside and outside diameters of the turns remains small, and the flat turns are pressed against one another.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: November 20, 2001
    Assignee: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation-SNECMA
    Inventors: Pierre Olry, Dominique Coupe, Bernard Lecerf, Jean-Michel Guirman