US Patent 7434833 Seat belt device for vehicle

There is provided a seat belt device for a vehicle, comprising bag portions and provided at seat belts and for protecting an occupant, a blower device to repeatedly supply the inflation air to the bag portions, air supply passages and connecting the bag portions with the blower device, and an air supply control device to supply the inflation air from the blower device to the bag portions so as to inflate the bag portions and discharge the supplied air from the bag portions so as to return the bag portions to deflated initial states. Accordingly, the occupant can be restrained to the properly large extent, thereby with the properly dispersed restraint force, and the inflation operation of the bag portion can be reused at need.