Pretensioner

Details Pretensioner Pretensioner

1999-02-19

2000-03-28

Jillions, John M.

Winding, tensioning, or guiding

Reeling device

With spring motor

B60R 2246

Patent

active

060420413

ABSTRACT:
A pretensioner for a seat belt system has first and second piston-cylinder arrangements arranged generally one on each side of a spool shaft so that in travelling along the respective cylinder, each piston engages the periphery of the spool shaft and causes it to rotate. A sensor is responsive to a crash situation to detonate a first piston drive means, and means for detonating a drive means for the second piston at the end of the stroke of the first piston. The spool shaft may be a component of a seat belt retractor. Alternatively, the spool shaft is wound with a cable that pulls on a seat belt or seat belt buckle.

REFERENCES:
patent: 4237690 (1980-12-01), Tsuge et al.
patent: 4434953 (1984-03-01), Gemar et al.
patent: 4573322 (1986-03-01), Fohl
patent: 5450723 (1995-09-01), Fohl
patent: 5634690 (1997-06-01), Watanabe et al.

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