Restraint system tensioning device with load limiting capability
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United States of America Patent
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-
Jan 11, 2005
Grant Date -
May 20, 2004
app pub date -
Nov 19, 2002
filing date -
Nov 19, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A belt-tensioning device for an occupant restraint is provided, designed to tension a belt (101) about an occupant at the onset of a vehicle collision, and to provide a measure of controlled force dissipation as the occupant loads the belt during the collision. In a preferred form, a tensioning member (122) moves in one direction (124) to tighten a belt about a vehicle occupant at the onset of a collision, and a braking device (130a, 130b) is configured to apply a controlled braking force to movement of the tensioning member in the opposite direction after the tensioning member has tightened the belt about the vehicle occupant. An array of braking members (130a, 130b) applies different levels of braking force to movement of the tensioning member in the opposite direction, thereby providing controlled braking force to movement of the tensioning member in the opposite direction.
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