Winding – tensioning – or guiding – Reeling device – With spring motor
Reexamination Certificate
2005-11-29
2005-11-29
Nguyen, John Q. (Department: 3654)
Winding, tensioning, or guiding
Reeling device
With spring motor
C280S805000
Reexamination Certificate
active
06969022
ABSTRACT:
A seat belt retractor has a rotatable spool for retraction or payout of seat belt webbing wound thereon, depending upon the rotation direction of the spool. A locking wheel is attached to one end of the spool. The spool 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 has locked to the locking wheel, under the influence of a vehicle occupant's forward momentum. The force limiter includes a torsion bar attached at one end to the locking wheel and at the other end to the spool, and a secondary force limiter mechanism releasably coupled in the force path between the spool and the locking wheel, and a mechanism for de-coupling the secondary mechanism after a predetermined number of turns of the torsion bar. The locking mechanism has a locking element that is resiliently biased to a position wherein it locks the spool to the locking wheel and is held out of locking engagement by the secondary force limiting mechanism. The retractor is converted into a standard locking retractor after load limiting ensuring that the vehicle occupant is securely restrained against secondary impacts.
REFERENCES:
patent: 6131843 (2000-10-01), Singer et al.
patent: 6598822 (2003-07-01), Nagata et al.
patent: 6669133 (2003-12-01), Palliser et al.
patent: 6698678 (2004-03-01), Hori et al.
patent: 2002/0050542 (2002-05-01), Shinji et al.
patent: 1 180 457 (2002-02-01), None
Barber Matthew
Bell John
Jack Brian
Palliser Martyn
Drayer Lonnie R.
Key Safety Systems, Inc.
Nguyen John Q.
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