Patent ID: 6385924
Filing Date: 2002-05-14
Classification: E05B,E05C,E05D,E05Y,Y10S,Y10T

Abstract:
A reinforced locking mechanism for a casement window provided with a window sash supporting a resistant window pane adapted to withstand physical force, blast and the kinetic energy of bullets and shrapnel, and mounted on a frame fixed within an opening in a wall;said sash being defined by the following four sash elements: a hanging stile, a shutting stile, a top rail and a bottom rail; said frame being defined by the following corresponding four frame elements: a shutting jamb, a hanging jamb, an upper head and a lower sill; at least one hinge connecting said hanging stile to said hanging jamb said locking mechanism which provides a reinforcing system in which mechanical energy is transferred from the window sash to the window frame comprising: a first eye hinge attached to said hanging stile separately from said hinge; a second eye hinge attached to said hanging jamb separately from said hinge, said hanging stile and said hanging jamb having coaxial eye portions which together define a longitudinal axis; a locking rod linearly displaceable along said longitudinal axis between a locked state in which said locking rod engages both said first and second eye hinges, and an unlocked state in which said locking rod is disengaged from at least one of said first and second eye hinges; and said rod in the locked state transferring mechanical energy from the first eye hinge attached to one of the sash elements to the second eye hinge attached to the corresponding frame element to dissipate this energy and thereby enhance the blast resistance of the window.