Trigger mechanism for belt pretensioner
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United States of America Patent
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-
Aug 6, 1996
Issued Date -
N/A
app pub date -
Nov 23, 1994
filing date -
Aug 16, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A trigger mechanism for a belt pretensioner comprises a sensor mass which responds both on a head-on collision and on ramming of the vehicle from the rear. The sensor mass may be pivotally mounted and formed by functional parts of the pretensioner drive. In a belt pretensioner which is combined with a belt retractor (10) to an assembly and which has a pyrotechnical piston/cylinder drive, the sensor mass consists of a carrier block (40) pivotally mounted on a base (12) and having a guide cylinder (42) mounted therein and a piston accommodated therein. A striker lever (50) pivotally mounted in the base (12) is released for activating an impact igniter on a gas generator cartridge (44) when the carrier block (40) is pivoted in vehicle-sensitive manner in the one or other direction.
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