Patent ID: 6449904
Filing Date: 2002-09-17
Classification: E05F,E05Y

Abstract:
A closure sequence controller for a pair of first and second door leaves pivotable with respect to a door frame, in which the first door leaf is provided with a first door closer and a first swing arm for closing the first door leaf and the second door leaf is provided with a second door closer and a second swing arm for closing the second door leaf, and the closure sequence controller comprises:a guide member for mounting to the door frame in cooperative engagement with distal ends of the swing arms respectively, such that closing movement of each said door leaf is accompanied by movement of said distal end of its swing arm along the guide member toward said distal end of the other swing arm, a support element stationarily attached to the guide member, the support element being formed with a guiding passage, a blocking member displaceable in the guiding passage between a blocking position, in which the blocking member projects partially from the guiding passage where the blocking member is adapted to limit movement of said distal end of the second swing arm along the guide member, and a releasing position in which said blocking member is adapted to allow movement of said distal end of the second swing arm along the guide member, a control member extending along the guide member, movable lengthwise of the guide member, having a first end positioned to be engaged by said distal end of the first swing arm and adapted to be urged by said distal end of the first swing arm along the guide member from a first position to a second position when the first door leaf pivots toward its closed position, and the control member also having a second end in cooperative engagement with the support element, and in its first position, the control member prevents the blocking member from moving from said blocking position to said releasing position and in its second position, the control member allows the blocking member to move from said blocking position to said releasing position, and a spring interposed between the control member and the support element and resisting movement of the control member along the guide member from the first position towards the second position.