Patents Assigned to Allevard Ressorts Automobile
  • Method of forming a torsion bar with hexagonal heads
    Patent number: 5979209
    Abstract: To make a metal torsion bar having an elongate central body connected to two hexagonal end heads via shoulders, the ends of a torsion bar blank are initially upset while hot so as to form the shoulders of the torsion bar together with cylindrical head blanks, after which each head blank is machined by removing material until the corresponding hexagonal head has been obtained.
    Type: Grant
    Filed: August 3, 1998
    Date of Patent: November 9, 1999
    Assignee: Allevard Ressorts Automobile
    Inventors: Yannick Belliato, Jean-Dominique Voisin, Frederic Vuillemard