An end of a seat belt (3) is connected to a part of the vehicle body via an actuator (8) that can selectively remove a slack from the seat belt. The actuator includes a mass member (8f) attached to said moveable end of said seat belt, a main actuator unit ...

A three-point seat belt system for a motor vehicle front seat has a belt tightening drive (3) fastened to the front seat. The belt tightening drive engages an anchoring point of the seat belt fastened to the vehicle seat. The drive element (5) of the belt ...