US Patent 7207594 Leg protection device for vehicle occupant

A leg protection device for a vehicle occupant is disposed inside a seat-front member of a vehicle. The leg protection device includes an air bag having a rear panel and positioned along the seat-front member and a front panel facing the occupant when the air bag is inflated, and a gas generator for inflating the air bag. When the air bag is inflated, the air bag has a vertical length at a center portion of the front panel in the width direction longer than a vertical length at a center portion of the rear panel in the width direction to obtain a curved cross section.