Method and device for a safety belt
AssigneeSaab Automobile AB
InventorsMats Fägerhag, Alf Hedlund, Kristina Wiklund, David C. Viano
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Abstract
For a safety belt (2) in a vehicle, the belt is tightened in the event of a collision for at least 300 ms, at the same time as the maximum pull on the safety belt is limited to a predetermined value during the whole tightening process. This is made possible by a tightening device (15) being arranged to be able to operate for at least 300 ms and by there being a load-limiting device (14) between the tightening device (15) and the belt.
Claims27
A method for restraining a belt wearer in a vehicle in the event of a collision by means of a safety belt comprising the steps of:
- reaching a predetermined retardation level for the vehicle;
- tightening the safety belt, wherein the step of tightening occurs for a period of at least 300 ms and begins after the beginning of the collision;
- and
- limiting a maximum pull on the safety belt to a predetermined value during a whole tightening process, wherein the limited maximum pull reduces a risk of injury to the belt wearer.
A device for a safety belt in a vehicle, where the safety belt is acted upon by a tightening device and is arranged to be tightened around a belt wearer, comprising:
- a load-limiting device for limiting a maximum pull on the safety belt;
- wherein the tightening device can be activated in the event of a collision to tighten the safety belt and the tightening device is arranged to be able to operate for a period of at least 300 ms starting after the beginning of the collision and that the load-limiting device is arranged to operate between the belt and the tightening device.
Dependencies are inferred from the claim text.