Retractor with load limiting spool

Details Retractor with load limiting spool Retractor with load limiting spool

1997-02-06

1998-10-13

Jillions, John M.

Winding, tensioning, or guiding

Reeling device

With spring motor

2423791, 280805, B60R 2228, B60R 2246

Patent

active

058200568

ABSTRACT:
An energy absorbing seat belt retractor comprises a frame, a spool rotatably mounted relative to the frame for protracting and retracting a seat belt wound thereabout, and a driving member (e.g., a rotatable and slidable nut) operatively coupled to the spool. A deformable energy absorbing member is disposed within a bore of the spool and functions to receive a driving force supplied by the driving member responsive to an occupant load, and to deform when the driving force exceeds a predetermined threshold to thereby absorb energy and permit a controlled rotation of the spool and a corresponding controlled protraction of the belt as the belt is loaded by the occupant. At least one stop ring is disposed in proximity to the deformable member and functions to contact the deformable member in a deformed state and control further deformation thereof to thereby limit the protraction of the seat belt.

REFERENCES:
patent: 3857528 (1974-12-01), Fiala
patent: 5526996 (1996-06-01), Ebner et al.
patent: 5626306 (1997-05-01), Miller et al.
patent: 5671894 (1997-09-01), Dybro et al.

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