Patents Assigned to Valti Societe Anonyme pour la Fabrication de Tubes Roulements
  • Steel and process for the manufacture of a component for bearings
    Patent number: 6403026
    Abstract: Steel for the manufacture of a component for bearings, the chemical composition of which comprises, by weight: 0.6%≦C≦1.5%; 0.4%≦Mn≦1.5%; 0.75%≦Si≦2.5%, 0.2%≦Cr≦2%; 0%≦Ni≦0.5%; 0%≦Mo≦0.2%; 0%≦Al≦0.05%; S≦0.04%; the balance being iron and impurities resulting from smelting and the composition furthermore satisfying the relationships: Mn≦0.75+0.55×Si and Mn≦2.5−0.8×Si. Process for the manufacture of a bearing component.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: June 11, 2002
    Assignees: Ascometal, S.N.R. Roulements, Valti Societe Anonyme pour la Fabrication de Tubes Roulements
    Inventors: Jacques Bellus, Gilles Baudry, Gilles Dudragne, Daniel Girodin, Gérard Jacob, Alain Vincent, Gérard Lormand
  • Process for the manufacture of a component for bearings and its products
    Patent number: 6383317
    Abstract: Steel for the manufacture of a component for bearings, the chemical composition of which comprises, by weight: 0.6%≦C≦1.5%; 0.4%≦Mn≦1.5%; 0.75%≦Si≦2.5%; 0.2%≦Cr≦2%; 0%≦Ni≦0.5%; 0%≦Mo≦0.2%; 0%<Al≦0.05%; S≦0.04%; the balance being iron and impurities resulting from smelting and the composition furthermore satisfying the relationships: Mn≦0.75+0.55×Si and Mn≦2.5−0.8×Si. Process for the manufacture of a bearing component.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: May 7, 2002
    Assignees: Ascometal, S.N.R. Roulements, Valti Societe Anonyme pour la Fabrication de Tubes Roulements
    Inventors: Jacques Bellus, Gilles Baudry, Gilles Dudragne, Daniel Girodin, Gérard Jacob, Alain Vincent, Gérard Lormand
  • Plug changing mechanism for use in piercing mills
    Patent number: 4022043
    Abstract: A method for changing the plug in a mandrel in which the plug is attached to the mandrel by a detachable interlocking mechanism. The plug is maintained fixed to the mandrel during the displacement of the latter through the blank following piercing and the plug is detached from the mandrel to the rear of the piercing mill towards the end of the rearward displacement of the mandrel. A new plug is then fitted on to the mandrel during the subsequent displacement of the mandrel in the direction of the piercing mill.
    Type: Grant
    Filed: April 4, 1975
    Date of Patent: May 10, 1977
    Assignee: Valti Societe Anonyme pour la Fabrication de Tubes Roulements
    Inventor: Michel Chevet