Reversible tightening arrangement for a vehicle seat belt with a combined pneumatic-spring drive is configured so that release of pressure in a pressure chamber results in tightening of the belt drive spring

摘要

Reversibly operating tightening arrangement for a vehicle seat belt has a drive spring (16) that is held tensioned by a pressurized chamber (30) of a hydraulic system. A tightening movement is produced by spring tensioning of the drive spring by releasing the pressure in the pressure chamber.