SEAT BELT RETRACTOR

WIPO Patent Application WO2004033249

A3

A seat belt retractor has a rotatable spool (1) for retraction or pay-out of seat belt webbing wound thereon, depending upon the rotation direction of the spool. A locking wheel (6) is attached to one end of the spool (1). The spool (1) to is locked to the locking wheel when a crash is sensed. A force limiter allows further payout of the seat belt webbing after the spool (1) has locked to the locking wheel (6), under the influence of a vehicle occupant's forward momentum. The force limiter includes a torsion bar (3) attached at one end to the locking wheel (6) and at the other end to the spool (1), and a secondary force limiter mechanism (5) releasably coupled in the force path between the spool and the locking wheel (6), and a mechanism for de-coupling the secondary mechanism after a predetermined number of turns of the torsion bar (3). The locking mechanism has a locking element (4) that is resiliently biased to a position wherein it locks the spool (1) to the locking wheel (6) and is held out of locking engagement by the secondary force limiting mechanism (5). The retractor is converted into a standard locking retractor after load limiting ensuring that the vehicle occupant is securely restrained against secondary impacts.

JP2010173550	WEBBING WINDING DEVICE
JP2024506471	seat belt retractor
WO/2024/102822	ENERGY ABSORBING SEATBELT ASSEMBLY

BELL JOHN
JACK BRIAN
PALLISER MARTYN
BARBER MATTHEW

PCT/US2003/027717

November 18, 2004

September 05, 2003

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BREED AUTOMOTIVE TECH (US)

B60R22/34; B60R22/28; (IPC1-7): B65H75/48

US6669133B2	2003-12-30
US6598822B2	2003-07-29
US6698678B2	2004-03-02

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