Seat belt retractor with torsion bar and rotation limit

Details Seat belt retractor with torsion bar and rotation limit Seat belt retractor with torsion bar and rotation limit

1997-07-22

1999-10-19

Jillions, John M.

Winding, tensioning, or guiding

Reeling device

With spring motor

B60R 2228

Patent

active

059674415

ABSTRACT:
A seat belt retractor (20) comprising: a frame (22); a hollow spool (30) for carrying a length of a seat belt (32), the spool rotationally supported upon the frame (22); a torsion bar (70), which when stressed can twist or rotate, having a first end (74) secured to a first end (48) of the spool (30) and a second end (76); a locking mechanism (200, 202, 210, 220, 222) for preventing the second end of the torsion bar (70) from rotating during an emergency; and a stopping mechanism (90, 110) located interior to the spool (30) for limiting the twisting of the torsion bar to a predetermined number of revolutions.

REFERENCES:
patent: 3857528 (1974-12-01), Fiala
patent: 3961761 (1976-06-01), Wiesbock
patent: 3970265 (1976-07-01), Kopke et al.
patent: 4322046 (1982-03-01), Tanaka et al.
patent: 5618006 (1997-04-01), Sayles
patent: 5626306 (1997-05-01), Miller et al.
patent: 5794877 (1998-08-01), Ono et al.

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