Liquid propellant airbag inflator with dual telescoping pistons
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United States of America Patent
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-
Mar 21, 2000
Grant Date -
N/A
app pub date -
Dec 19, 1997
filing date -
Feb 3, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
An airbag inflator includes a pair of telescoping pistons slidingly mounted within a housing. Pressurization of a combustion chamber by a pyrotechnic initiator acts on one piston to pressurize a hydraulic fluid chamber, which, in turn, acts on the other piston to pressurize a liquid propellant reservoir. Liquid propellant can then be regeneratively pumped from the reservoir into the combustion chamber for combustion to generate an airbag inflation gas. A hydraulic fluid damping chamber is utilized to exert a controllable retarding force on the one piston, such as to control the rate of airbag inflation gas generation.
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