Pretensioner in vehicle safety belt systems

Details Pretensioner in vehicle safety belt systems Pretensioner in vehicle safety belt systems

1990-05-25

1991-08-13

Bertsch, Richard A.

Land vehicles

Wheeled

Attachment

297480, B60R 2218

Patent

active

050391275

ABSTRACT:
A retraction element in the form of a pivotally mounted lever or of a linearly slidable slider is mounted on a base plate to be preferably attached to the vehicle seat. The lever or slider is loaded by a strong flat spiral spring, but is held in a stable rest position by a latching device. The latching device consists of two roller body systems functionally connected in series. The first roller body system consists of two outer rolls and an inner, loose roll bearing on one roll of the second system. The second system consists of two outer rolls and an inner roll being situated in an over-dead-center position and mounted on one arm of a double-armed lever whose other arm carries a vehicle sensitive inertial mass. A release threshold may be defined precisely and reproducibly by means of this latching device.

REFERENCES:
patent: 4176810 (1979-12-01), Bertrand et al.
patent: 4944531 (1990-07-01), Knabel et al.

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