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US 4,705,296 AGranted
Seat belt pre-tensioning device
AssigneeAutoliv Development AB
InventorsSture R. Andersson, Lars Y. Haland, Bengt O. J. S. Morner
Life of this patent
Estimating the term…
Abstract
A seat belt pre-tensioning device is adapted to be mounted on a vehicle and includes a buckle to receive a seat belt buckle. The device incorporates components which are responsive to a predetermined deceleration of the vehicle and which move to permit spring-loaded components to apply a force to move the buckle to apply a tension to the seat belt.
Claims13
A vehicle seat belt tensioning device comprising:
- means for mounting the device in a vehicle;
- a moveable member mounted on the device, means for receiving part of a seat belt connected to said moveable member;
- force applying means for applying a force to said moveable member to move said seat belt receiving means in a direction to apply a tension to the seat belt;
- and means for normally preventing said force applying means from moving said seata belt receiving means, but which are responsive to a predetermined deceleration for actuating said force applying means to permit the force applying means to apply their force to move said seat belt receiving means;
- and wherein said means for preventing includes a stop which is engaged by part of said moveable member, and said stop is formed on an element which is adapted to move by its own inertia relative to the rest of the device, when the device is subject to a predetermined accelerational or decelerational force, thus disengaging the stop from said part of said member.
2 more elements
A vehicle seat belt pre-tensioning device comprising:
- means for mounting the device in a vehicle;
- means on the device for receiving part of a seat belt;
- force applying means for applying a force to move said seat belt receiving means in a direction to apply a tension to a seat belt connected to said seat belt receiving means, said force applying means including a torsion bar having one end which is movable in the axial direction of the vehicle in response to deceleration of the vehicle, and which is connected to said seat belt receiving means for applying said tension force;
- and means for normally engaging said one end of said torsion bar for preventing said torsion bar from moving said seat belt receiving means and for disengaging said one end of said torsion bar in response to movement of said one end corresponding to a predetermined deceleration so that said bar may then apply its force to said seat belt receiving means to move same.
1 more element
Dependencies are inferred from the claim text.