Combined seat belt retractor and tensioner unit
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United States of America Patent
Stats
-
Jun 24, 1997
Grant Date -
N/A
app pub date -
Oct 21, 1994
filing date -
Oct 25, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a belt tensioner for vehicular seat belt restraining systems the belt reel (16) of a belt retractor is caused to rotate by a linear drive unit via a step-up gear. The linear drive unit comprises a burstproof cylinder tube (42) closed off at both ends and a hollow piston (44) shiftable therein. Within said hollow piston a pyrotechnical propelling charge (50) with an igniter (52) is accommodated. The belt tensioner is distinguished by its compact configuration, low weight and low-cost production as well as by the linear drive unit being safe to handle.
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Family
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