Retractor shaft-rotating type seat belt pretensioner

Details Retractor shaft-rotating type seat belt pretensioner Retractor shaft-rotating type seat belt pretensioner

1992-12-14

1994-11-15

Dorner, Kenneth J.

Chairs and seats

Body or occupant restraint or confinement

Safety belt or harness; e.g., lap belt or shoulder harness

297479, B60R 2246

Patent

active

053641680

ABSTRACT:
A retractor shaft-rotating type seat belt pretensioner for imparting pretension to a seat belt by rotating the take-up shaft of a belt retractor comprises a driving member engageable with a driven member on the take-up shaft and a power source coupled to the driving member and adapted to rotate the driving member by applying an operating force to it at an operating point. A guide surface supports the driving member at a reaction support point against the reaction force due to a rotary moment applied to the driving member at an engaging point where the driving member engages the take-up reel, the reaction support point being on the opposite side of the engaging point from the operating point where the operating force of the power source acts on the driving member.

REFERENCES:
patent: 4925212 (1990-05-01), Motozawa
patent: 4932722 (1990-06-01), Motozawa
patent: 5160168 (1992-11-01), Nishizawa et al.

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