Belt tightening drive
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United States of America Patent
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Aug 16, 2016
Grant Date -
Oct 23, 2014
app pub date -
Mar 19, 2014
filing date -
Mar 25, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
The invention is a belt tightening drive for tightening a seat belt that can be wound about a winding shaft, comprising a spindle shaft driven by a drive unit and a worm drive with a worm supported in a torque-proof fashion on the spindle shaft and a driven wheel, engaged therewith and supported in a torque-proof fashion on the winding shaft. According to the invention it is provided that the worm comprises a first toothed section with a first toothed geometry, wherein the first position of the worm the first toothed section engages the driven wheel, the worm comprises at least a first toothed section and following a second toothed section with a second toothed geometry, with the first and second toothed geometries being embodied differently.
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