Rotary actuator-operated seat belt pretensioner

Details Rotary actuator-operated seat belt pretensioner Rotary actuator-operated seat belt pretensioner

1993-02-11

1995-01-24

Jillions, John M.

Winding, tensioning, or guiding

Reeling device

With spring motor

280806, B60R 2246

Patent

active

053836235

ABSTRACT:
A rotary actuator-operated seat belt pretensioner comprises a frame, a belt take-up shaft rotatably mounted on the frame, and a rotary actuator mounted on the frame and including a pressure chamber, a rotating member and a gas generator for supplying pressurized gas to the pressure chamber to impart rotation to the rotating member. A clutch is interposed between the rotating member and the take-up shaft. The pressure chamber of the actuator is annular and includes an inner wall defining a space within the chamber, and the clutch is received in the space within the chamber. The driving force of the rotating member produced by gas pressure supplied to the pressure chamber is transmitted to the take-up shaft by the clutch, and rotation of the take-up shaft winds a segment of the belt onto the shaft and thereby tightens the belt.

REFERENCES:
patent: 4014479 (1977-03-01), Nilsson et al.
patent: 4151967 (1979-05-01), Lindblad
patent: 4230288 (1980-10-01), Fohl
patent: 4455000 (1984-06-01), Nilsson
patent: 4558832 (1985-12-01), Nilsson
patent: 4597586 (1986-07-01), Burghardt et al.
patent: 5050814 (1991-09-01), Butenop et al.

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