Land vehicles – Wheeled – Attachment
Patent
1992-04-13
1994-12-20
Mitchell, David M.
Land vehicles
Wheeled
Attachment
280806, B60R 2236
Patent
active
053740807
ABSTRACT:
In a belt pretensioner for safety belt systems in vehicles in which the belt buckle is disposed on a vehicle seat and the belt pretensioner engages said buckle, the problem is encountered that the vehicle-sensitive sensor mass mounted movably on the vehicle seat also responds to decelerations of the vehicle seat relatively to the vehicle bodywork. To prevent any erroneous activation caused thereby, the sensor mass is secured until occurrence of a first predetermined vehicle deceleration value which is lower than a second vehicle deceleration value at which the activation of the drive of the belt pretensioner by the movement of the sensor mass occurs. On the other hand, the securing of the sensor mass is cancelled on exceeding of the first vehicle deceleration value. The cancelling of the securing of the sensor mass is ensured by a separate deceleration sensor which is mounted directly on the vehicle bodywork, for example beneath the vehicle seat.
REFERENCES:
patent: 4703950 (1987-11-01), Pickett
patent: 4757954 (1988-07-01), Doty
patent: 4881781 (1989-11-01), Borlinghaus et al.
patent: 5143403 (1992-09-01), Fohl
patent: 5149128 (1992-09-01), Fohl
patent: 5149134 (1992-09-01), Fohl
Avila Stephen P.
Mitchell David M.
TRW (Repa) GmbH
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