Door maneuvering arrangement

A drive arrangement for manoeuvering a substantially vertically moveable door, said arrangement comprising a bendable door lifting element which is connected at least to one of the two longitudinal side edges of the door, and an elongated, bendable counterweight device which is connected to the door lifting element and which is moveable by the door lifting element between an inactive position in which the counterweight device is generally horizontal and an active position in which at least part of the weight of the counterweight device exerts a lifting force on the door through the intermediary of said door lifting element.

A drive arrangement for manoeuvering a substantially vertically moveable door, said arrangement comprising a bandable door lifting element which is connected at least to one of the two longitudinal side edges of the door, said lifting element including an endless drive belt, and an elongated, bendable counterweight device which is connected to the door lifting element and which is moveable by the door lifting element between an inactive position in which the counterweight device is generally horizontal and an active position in which at least part of the weight of the counterweight device exerts a lifting force on the door through the intermediary of said door lifting element, said counterweight device including a plurality of mutually separate bodies which are connected to the lifting element in sequential relationship.

A door apparatus, said apparatus comprising a substantially vertically moveable door (12) of the kind with which the force required to open the door increases with the extent to which the door is opened, and a drive arrangement for manoeuvering said door, said arrangement comprising a bendable door lifting element which is connected at least to one of the two longitudinal side edges of the door, characterized in that connected to the door lifting element (60) is an elongated, bendable counterweight device (72) which is intended to be moved by the door lifting element (60) between an inactive position in which the counterweight device is generally horizontal and an active position in which at least part of the weight of the counterbalance device exerts a lifting force on the door (12) through the intermediary of said door lifting element.

A door apparatus, said apparatus comprising

• a substantially vertically moveable door of the kind with which the force required to open the door increases with the extent to which the door is opened;
• and
• a drive arrangement for manoeuvering said door, said arrangement comprising a bendable door lifting element which is connected at least to one of the two longitudinal side edges of the door, and an elongated, bendable counterweight device which is connected to the door lifting element and which is moveable by the door lifting element between an inactive position in which the counterweight device is generally horizontal and an active position in which at least part of the weight of the counterweight device exerts a lifting force on the door through the intermediary of said door lifting element.