Patent ID: 7236602

Claim:
A device for actuating a membrane arranged in an opening to a space, wherein the membrane has a first surface and a second opposite surface, and is limited by an edge area extending around the membrane, wherein the device includes: a first strip, which is adapted to be attached to the second surface of the membrane in the edge area, a second strip, which is adapted to be attached to a surface of a frame portion extending around the opening, at least one exchanging member, which is provided between and connecting the first strip and the second strip, at least one actuating member arranged to transfer a reciprocating primary movement to the exchanging member, which is arranged to convert the primary movement to a reciprocating secondary movement having a longer length of stroke than the primary movement and acting on the strips in such a way that at least one of the strips moves towards and away from the other strip, wherein the primary movement extends along a primary axis (x) and the secondary movement extends along a secondary axis (z) forming an angle to the primary axis (x), and the exchanging member including a rod extending longitudinally between and parallel to the first strip and second strip wherein the actuating member is arranged to engage and transfer the primary movement to the rod in such a way that it reciprocates linearly along its longitudinal direction parallel with the primary axis (x) to force the strips to move towards and away from each other parallel with the secondary axis (z).