The invention relates to a tensioning device (10) for a seat belt, in particular in a motor vehicle, comprising a gas generator (17), a piston (21), which is guided in a pipe (16) and which closes a pressure chamber (20) in the pipe (16), wherein a pressure can be applied to the pressure chamber (20) by means of the gas generator (17). The piston (21) can be indirectly driven to a tensioning motion by the pressure present in the pressure chamber (20), wherein the piston (21) has a, preferably dome-shaped, end face (3) for contacting a mass body (19) that can be slid in the tube (16). The piston (21) has a narrowed channel (1), which can be expanded by means of a pressure increase in the pressure chamber (20), by means of a thermal influence connected with a pressure increase in the pressure chamber (20), or by means of a material removal caused by a pressure increase in the pressure chamber (20). The channel (1) is formed on the end face (3) of the piston (21).
STRAFFERVORRICHTUNG FÜR EINEN SICHERHEITSGURT
TENSIONING DEVICE FOR A SAFETY BELT
TENDEUR DE CEINTURE DE SÉCURITÉ
2018-10-03
Patent
Elektronische Ressource
Deutsch
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |