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(11) | EP 2 428 631 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | A drive device for a wing of a door, window or the like. |
| (57) A drive device for a wing of a door, window or the like, comprises a drive member
for driving the wing. The drive member is rotatable about a rotation axis between
two positions which corresponds to two positions of the wing. A drive motor is connected
to the drive member for driving the drive member from the first position to the second
position. A spring device is connected to the drive member for driving the drive member
from the second position to the first position. The spring device comprises a spring
means which is arranged between a stop and a spring seat. The stop has a fixed position
relative to the rotation axis of the drive member. The spring seat is arranged on
a slidable body so as to move the spring seat relative to the stop. A flexible connecting
element is attached to the drive member and to the slidable body of the spring device
for allowing a displacement of the slidable body along the elongate guide member so
as to prestress the spring means when the drive member is driven from the first position
to the second position. The flexible connecting element is arranged adjacent to and
outside of the spring means and extends from the drive member substantially parallel
with respect to the longitudinal axis of the spring means, is guided over a reversing
guide member of the slidable body, and from there extends in a direction opposite
to the first part.
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