Actuator for an active louver device

Herein, an actuator 2 for an active louver device is disclosed, may manually open during a failure of the actuator 2 which louvers 6 and the open air dampers 6 can prevent from closing, using, for example, from the vehicle wind caused. The device comprises a worm gear 23 which is driven by the power from a motor 12, and a spur gear 24 which is adapted to transmit a rotational force from the worm gear 23 to the air valves. 6