Advertising device for fixing to a vehicle, bicycle, etc., is rotated by passage of air over vane assembly

摘要

Mounted on a long whippy shaft (1) are a four-vane rotor (2) an intermediate display object (3) and an upper display object (4). The lower end of the shaft is set into a bearing mounted on a vehicle or bicycle. As the vehicle moves along, air passing over the vanes (2) causes the shaft the rotate.