Patents Assigned to Le Material Magnetique
  • Permanent magnet magnetic control device having two control air gaps
    Patent number: 4122423
    Abstract: A magnetic control device comprising one pair of permanent magnets cooperating with armatures to form first and second air gaps and, means for inverting the direction of magnetization of one magnet. In a first direction of magnetization, the flux closes through the first air gap, while, in the opposite direction, the flux is at least partially cancelled in the first air gap and passes through the second air gap, which is substantially smaller than the first air gap. Such a device is adapted to actuate a two way valve.
    Type: Grant
    Filed: April 27, 1977
    Date of Patent: October 24, 1978
    Assignee: Le Material Magnetique
    Inventor: Michel Cotton DE Bennetot