Seatbelt system having a force limiter
AssigneeTRW Automotive GmbH
InventorsNizam Bedak, Joachim Biller, Michael Folter, Helmut Schuster
Life of this patent
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Abstract
A belt retractor including a force limiter comprises a belt reel which is rotatably supported in a frame as well as a blocking unit counteracting a rotation of the belt reel and a force limiter between the belt reel and the blocking unit which permits a limited torsion of the belt reel against the blocking unit under load. The force limiter includes a damping element consisting of a cross-linked polymer which is sheared under load.
Claims14
A belt retractor comprising a belt reel (10) rotatably supported in a frame (1), a blocking unit (11) counteracting a rotation of the belt reel and comprising a force limiter (20) between the belt reel and the blocking unit which permits a rotation of the belt reel relative to the blocking unit under load, the force limiter (20) including a damping element (40) that damps relative rotation between the belt reel and the blocking unit, the damping element (40) including a cross-linked polymer that is sheared under load, the damping element (40) being arranged in an annular space (25) inside the belt reel (10).
A belt retractor comprising:
- a belt reel rotatably supported in a frame;
- a blocking unit preventing a rotation of the belt reel relative to the frame;
- a force limiter including a damping element, the damping element transferring force between the belt reel and the blocking unit, the damping element having a cross-linked polymer that shears when the belt retractor is subjected to a load to damp a relative rotation between the belt reel and the blocking unit.
Dependencies are inferred from the claim text.