Patents Assigned to Societe des Hauts Fourneaux de la Chiers
  • Hollow flexible tubular body, process and apparatus for making the same
    Patent number: 4019539
    Abstract: A hollow flexible tubular body which comprises at least one tubular layer. The layer is formed by adjacent helical windings having hooked edges and substantially flat sections. The turns of the helix do not show any spontaneous tendency to increase in diameter.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: April 26, 1977
    Assignees: Societe des Hauts Fourneaux de la Chiers, Coflexip, Institut Francaise du Petrole, des Carburants et Lubrifiants et Entreprise de Recherches et d'Activities Petrollieres Elf
    Inventors: Daniel Hoffmann, Remi Reynard