| abstract |
A ventilation device (10) comprising: a wing (16, 19) which is configured for spatial movement; and at least one actuator (12, 14) in operative connection with the wing (16, 19), which is designed to move the wing (16, 19) spatially in at least one direction, the actuator (12, 14) being an active one Comprises material which is configured to experience a change in at least one property upon receipt of an activation signal, the change in at least one property causing an orientation of the wing (16, 19) to be selectively changed; wherein the at least one actuator (12, 14) comprises two antagonistically designed sets of partial actuators, each comprising an active material that is designed to experience a change in at least one property on receipt of an activation signal, the change causing at least one property that each of the two antagonistically designed sets of partial actuators is selectively moved in two directions; characterized in that the two antagonistically designed sets of partial actuators each comprise at least two binary partial actuators (20, 24; 22, 26) which are mechanically connected in series. |