Patent ID: 6742563
Filing Date: 2004-06-01
Classification: E06B

Abstract:
A rolling grille having:a set of horizontal bars, the bar set divided into a lower bar sub-set with a top bar and an upper bar sub-set with a bottom bar; a row of end plates on each side of the grille joining the ends of the bars in at least the lower bar sub-set together, each plate in the lower bar sub-set joining two adjacent bars together, each bar connected to two adjacent plates, the plates aligned when the grille closes an opening; each plate having a panel with an outer surface facing outwardly when the grille closes the opening and bar mounting sections at the top and bottom of each panel, at least one of the top and bottom bar mounting sections having stop means located to abut on the outer surface of the panel of an adjacent plate when the grille closes an opening, the stop means forming the lower bar sub-set into a relatively rigid assembly when an attempt is made to raise the lower sub-set; and a locking linkage on each side joining the lower and upper sub-set of bars together, the locking linkage connected to the top bar in the lower sub-set and the bottom bar in the upper sub-set and aligned with the end plates, the locking linkage having a locks link movable into a locking position when an attempt is made to raise the lower sub-set of bare when the grille closes an opening.