Patents Assigned to Ateliers Metallurgiques de Saint Urbain (AMSU)
  • Patent number: 6132533
    Abstract: The invention relates to a method for making arcuate coil springs from straight coil springs and particularly includes a phase of bending the straight springs during a heat treatment, which method provides exceptional results in that for the bending, a lasting arcuate shape is imparted to the springs substantially by giving the springs the shape of a portion of a turn to provide the spring with a counter-defect prior to the subsequent finishing steps. The invention also relates to a spring manufactured according to such a method and to devices for carrying out the method which include devices for holding at least the end coils of the springs in staggered positions, which devices may include a holder provided with fastening devices.
    Type: Grant
    Filed: June 12, 1997
    Date of Patent: October 17, 2000
    Assignee: Ateliers Metallurgiques de Saint Urbain (AMSU)
    Inventors: Stanislas Cofrade, Pascal Boudier