Pretensioner testing apparatus and method
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United States of America Patent
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Jan 9, 2007
Grant Date -
Oct 20, 2005
app pub date -
Apr 14, 2004
filing date -
Apr 14, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A test system is provided for simulating pre-tensioner systems that use pyrotechnic gas generators. In a preferred form, the test system includes a pneumatic cylinder energized by pressurized air from an accumulator and passing through a fast acting ball valve. A substantially linear relationship is established between accumulator pressure and the time rate of change of acceleration of a piston in the pneumatic cylinder. Use of the test system allows improved evaluation of seat belt systems employing pre-tensioners with pyrotechnic gas generators.
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