Seat belt retractor

Details Seat belt retractor Seat belt retractor

1986-05-19

1987-12-22

Bertsch, Richard A.

Land vehicles

Wheeled

Attachment

180268, 280806, 297475, B60R 2110

Patent

active

047142740

ABSTRACT:
In a seat belt retractor including a housing, a take-up shaft rotatably mounted to the housing, a spring for biasing the take-up shaft in a belt retracting direction, a gear mechanism operatively connected to the belt take-up shaft, a tensionless mechanism operatively connected to the gear mechanism and operable to prevent the take-up shaft from rotating in the belt retracting direction and a motor actuated slack control mechanism operatively connected to the gear mechanism and operable to rotate the belt take-up shaft, there is provided a control unit constructed of a computer in which under normal driving posture of a driver (or belt wearer), an appropriate belt slack is automatically provided depending upon a vehicle speed, and upon posture change of the driver for reverse driving of the vehicle, a tensionless state is established in the retractor with the seat belt which has been drawn out by a certain amount due to the posture change of the driver.

REFERENCES:
patent: 4310175 (1982-01-01), Pickett
patent: 4384735 (1983-05-01), Maeda et al.
patent: 4534441 (1985-08-01), Kamijo et al.
patent: 4616141 (1986-10-01), Hollowell

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