Door manoeuvering arrangement

Details Door manoeuvering arrangement Door manoeuvering arrangement

E - Fixed Constructions

05

F

E05F 1/00 (2006.01) E05F 15/16 (2006.01) E06B 9/262 (2006.01) E06B 9/62 (2006.01) E05D 15/24 (2006.01)

Patent

CA 2060290

Abstract The invention relates to a drive arrangement for man- oeuvering a generally vertically moveable door, the arrangement comprising at least one bendable door lift- ing element which is connected to at least one of the two longitudinal side edges of the door. In order to enable the force required to manoeuvre the door to be held substantially constant, or to vary only signifi- cantly over the full opening range of the door, particu- larly in the case of doors of the kind in which the force required to open or manoeuvre the door increases with the extent to which the door is opened, it is proposed in accordance with the invention that the door lifting element (60) has connected thereto an elongated, bendable counterbalance device (72), and in that the door lifting element (60) will function to move the counterbalance device between an inactive position, in which it is generally horizontal, and an active position in which at least a part of the weight of the counter- balance device will exert a lifting force on the door (12) through the intermediary of the door lifting ele- ment. (Figure 1).

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