Patents Assigned to Societe Bernard Calais S.A.R.L.
  • Control apparatus for hermetically closing an opening in a wall
    Patent number: 3950893
    Abstract: Control apparatus for a device for hermetically closing an opening in a wall, which device includes a leaf movable from a hermetically closed position to a disengaged position in which it is slidable along a rail. The control apparatus includes a drive mechanism for moving the leaf from the hermetically closed position to the disengaged position and a linear electric motor for sliding the leaf along the rail, the linear motor including a first element secured to the leaf and a second element secured to the wall.
    Type: Grant
    Filed: February 5, 1975
    Date of Patent: April 20, 1976
    Assignee: Societe Bernard Calais S.A.R.L.
    Inventors: Bernard Calais, Luis Vidal