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US 2026/0097736 A1Published application
Seat belt retractor with adaptive load limiting and extension stop functions
AssigneeAutoliv ASP, Inc.
InventorsBin WANG, Jon E. BURROW, Christopher D. HALL
Life of this patent
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Abstract
A seat belt retractor spool for a retractor providing load limiting and protraction stop functions. Spool designs are described which receive load limiting torsion bars and also having an end receiving the stop nut of a protraction limiting feature for the retractor. The spool designs provide an interface for the stop function while preserving the structural integrity of the spool.
Claims13
A spool assembly for a seat belt retractor for seat belt webbing for providing load limiting and protraction limiting stop functions, comprising;
- a spool having an exterior surface for receiving the seat belt webbing, and an interior cavity,
- a torsion bar received by the spool interior cavity,
- a tread head assembly having a rotor, a stop nut and a stop post, the stop nut threaded onto the stop post, the stop nut forming an external first torsional coupling surface,
- the spool comprised of a spool body forming an open end, and an end plate affixed to the spool body at the open end, the end plate forming an internal second torsional coupling surface mating with the external first torsional coupling surface of the stop nut.
1 more element
Dependencies are inferred from the claim text.