Patent ID: 7665506

Claim:
A roller shutter device ( 3 ) adapted and so constructed to close a window ( 1 ) or other opening, the shutter ( 3 ) having side edges ( 4 ) that are held in guide tracks ( 5 ) during a movement of the shutter ( 3 ) between an open position and a closed position, wherein the side edges ( 4 ) of the shutter ( 3 ) disengage from the guide tracks ( 5 ) when a traction force transversal to a longitudinal direction of the guide tracks ( 5 ) is exerted on the shutter ( 3 ), each of the guide tracks ( 5 ) having an access opening ( 6 ) in an upper part thereof, wherein a portion ( 12 ) of the guide tracks is located above the access opening, wherein through the access opening ( 6 ) the corresponding side edge ( 4 ) of the shutter ( 3 ), after being disengaged from the guide track ( 5 ), is again engaged into the portion ( 12 ) of the guide track located above the access opening ( 6 ) when the shutter ( 3 ) is being moved into its open position, wherein control means ( 9 , 10 ) are provided, at least up to a level located below the portion ( 12 ) of the guide track located above the access opening ( 6 ), on either side of a plane extending in the longitudinal direction of the guide tracks ( 5 ) and passing through the guide tracks ( 5 ), wherein said control means are formed by a lintel ( 9 ) defining the top of the window ( 1 ) or other opening, and a bar ( 10 ), located on the side of the plane passing through the guide tracks ( 5 ) opposite said window ( 1 ) or other opening, extending substantially horizontally and parallel to said plane, and wherein said control means ( 9 , 10 ) controls a sway of the shutter ( 3 ) at a point where the side edges ( 4 ) are engaged into said portion ( 12 ) of the guide track through the access opening ( 6 ).