Emergency optical signalling device

Optical signaling device for a vehicle, comprising:

• at least one support element fitted onto the vehicle;
• a revolving element arranged on said support element for rotation about a substantially vertical rotation axis;
• drive means acting on said revolving element to promote rotation thereof about said rotation axis;
• one or more optical signaling elements associated with said revolving element and electrically connected to an electric power source for illumination, each of said optical signaling elements comprising coherent laser light generators/emitters;
• wherein said revolving element comprises a cylindrical body coaxial with said rotation axis and housing internally thereof said one or more laser light generators/emitters,
• said laser light generators/emitters being arranged in a respective seat with emission hole coaxial therewith, formed on the side surface of said cylindrical body,
• each of said seats and said respective emission holes being arranged along a respective longitudinal axis inclined with respect to said rotation axis of said cylindrical body so that the laser rays emitted by said generators/emitters are inclined downwardly towards a roadway beneath the vehicle,
• said drive means being coupled to said revolving element to rotate said cylindrical body about said rotation axis at a sufficient rotational speed to form an image of a cone of light,
• said cone of light having a base directed towards a plane of travel of said vehicle and laying on the roadway,
• said cone having an axis substantially coincident with said vertical rotation axis and a vertex arranged on said rotation axis above said support element to envelope a body of said vehicle and move at a corresponding speed to a speed of the vehicle to result in the vehicle being clearly visible during conditions of poor visibility.