SYSTEM FOR PROTECTING ROLLING SHUTTERS OF DOORS OR INCLINED DOORS FROM EXTERIOR PRESSURES BY USE OF A MANUALLY- OR AUTOMATICALLY-DEPLOYED TELESCOPIC ARTICULATED FRAMEWORK SET BEHIND THE DOOR'S SURFACE

摘要

It is disclosed herein an improved construction of different metal frameworks, which are variants (types) of the initial telescopic articulated metal framework placed on closed metal rolling shutters for vent pressure resistance.