Abstract: An invention is provided for a security shutter assembly. The security shutter assembly includes a shutter door having a plurality of operable louvers pivotally mounted between vertical stiles. A locking element is attached to the first vertical stile, and can be set in a locked position that secures the shutter door closed, and an open position that allows the shutter door to be opened. The locking element includes a louver flange portion that extends over the louvers when the louvers are in the closed position and the locking element is in the open position. However, the louvers block the louver flange from being positioned over the louvers when the louvers are in the open position, thus preventing the locking element from being placed in the open, and unlocked, position while the louvers are in the open position.

Abstract: An invention is provided for a security shutter assembly. The security shutter assembly includes a shutter door having a plurality of operable louvers pivotally mounted between vertical stiles. A locking element is attached to the first vertical stile, and can be set in a locked position that secures the shutter door closed, and an open position that allows the shutter door to be opened. The locking element includes a louver flange portion that extends over the louvers when the louvers are in the closed position and the locking element is in the open position. However, the louvers block the louver flange from being positioned over the louvers when the louvers are in the open position, thus preventing the locking element from being placed in the open, and unlocked, position while the louvers are in the open position.