ROLL-UP SHUTTER Russian patent published in 1995 - IPC

FIELD: protective devices. SUBSTANCE: roll-up shutter has sheet rolled up on movable drum with grooves, which is installed on fixed shaft. Located inside drum is torsion spring whose one end is connected with fixed shaft. Roll-up shutter has also stopping device and flexible member. Stopping device is made in form of spring-loaded pin having recess facing movable drum installed in body for engagement with flexible member, and stopping member in form of ball or cylindrical roller installed in hole of body for engagement with spring-loaded pin and drum grooves made on its outer surface. EFFECT: higher maintainability, improved adaptability to manufacture and minimal labor in repairs. 3 dwg