Patents by Inventor Bernard Calais

Bernard Calais has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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