Patent ID: 6564510
Filing Date: 2003-05-20
Classification: E05F,E05Y

Abstract:
A closure sequence controller for first and second door leaves pivotable with respect to a door frame, each door leaf having a hinge edge at which it is hingedly attached to the door frame, the first door leaf being provided with a first door closer and a first pull arm for closing the first door leaf, the second door leaf being provided with a second door closer and a second pull arm for closing the second door leaf, each pull arm having a distal end, and the door frame being provided with an elongate guide member for guiding movement of the distal ends of the pull arms longitudinally of the guide member, and wherein during movement of the first door leaf in a closing direction from an open position towards a closed position, the distal end of the first pull arm moves along the guide member initially away from the hinge edge of the first door leaf and subsequently towards the hinge edge of the first door leaf, and the closure sequence controller includes:a blocking device which, during a closing movement of the second door leaf, blocks movement of the distal end of the second pull arm past the blocking device when the first door leaf is in the open position, an engagement piece attached to the first pull arm at the distal end thereof, a coupling member for transmitting a pulling force from the distal end of the first pull arm to the blocking device, and a counter engagement piece attached to the coupling member, and wherein the engagement piece and the counter engagement piece provide selective mechanical coupling between the coupling member and the first pull arm in a manner such that when the first door leaf reaches a predetermined position during movement of the first door leaf in a closing direction, movement of the engagement piece attached to the first pull arm towards the hinge edge of the first door leaf applies the pulling force to the counter engagement piece, the coupling member transmits the pulling force to the blocking device, and the blocking device is responsive to the pulling force transmitted by the coupling member to release the distal end of the second pull arm and allow movement of the distal end of the second pull arm past the blocking device, whereas movement of the engagement piece attached to the first pull arm away from the hinge edge of the first door leaf does not apply a force to the counter engagement piece.