Multi-level load limiting torsion bar retractor

Details Multi-level load limiting torsion bar retractor Multi-level load limiting torsion bar retractor

1998-02-19

2000-01-11

Nguyen, John Q.

Winding, tensioning, or guiding

Reeling device

With spring motor

280805, B60R 2228, B65H 7548

Patent

active

060126671

ABSTRACT:
An energy absorbing retractor having a frame, locking mechanisms to initially stop a spool from rotating in a belt protraction direction, the spool rotationally supported relative to the frame, a seat belt wound about the spool, and biasing device to retract the seat belt, a two-sided torsion bar for generating at least a first level of reaction torque on the spool permitting the spool to rotate in a controlled manner in a belt protracting direction including a torsion bar having a middle portion fixedly coupled to the spool to prevent relative rotation therebetween, a first torsion rod extending therefrom, the first torsion rod including a first end coupled to a first locking mechanism to prevent the first end from rotating upon such coupling, whereby upon locking of the first end, and the loading of the spool, the first torsion rod is twisted to generate a first level of control force. A second torsion rod including a second end coupled to a second locking mechanism to prevent the second end from rotating upon such coupling, whereby upon locking of the second end, and the loading of the spool, the first and second torsion rods are twisted simultaneously to generate a second level of control force.

REFERENCES:
patent: 5785269 (1998-07-01), Miller, III et al.
patent: 5799893 (1998-09-01), Miller, III et al.
patent: 5820058 (1998-10-01), Hinzel et al.

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