Belt retractor with a belt pretensioner acting on the belt drum
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United States of America Patent
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Aug 22, 1995
Grant Date -
N/A
app pub date -
Jul 8, 1993
filing date -
Jul 13, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
The belt retractor with a belt pretensioner acting on the belt drum (12) has a pyrotechnical piston and cylinder linear drive (22). A rack (32) adapted to be subjected to thrust is connected with the piston (28) of such linear drive (22). The rack (32) is able to be drivingly coupled with the belt drum by the intermediary of a step-up gear wheel transmission (34, 36, 44). After tensioning of the belt, tensions in the safety belt system are limited by plastic deformation of a torsion rod (38), and peak strain values are decreased. The belt retractor is integrated with the belt pretensioner and the energy converter as a compact assembly.
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