Land vehicles – Wheeled – Attachment
Reexamination Certificate
2005-10-19
2010-12-07
Fleming, Faye M. (Department: 3616)
Land vehicles
Wheeled
Attachment
C280S741000, C280S742000
Reexamination Certificate
active
07845679
ABSTRACT:
The present invention relates to a gas generator for a motor vehicle safety device, the generator comprising:. a first chamber (C) for combustion containing a pyrotechnic initiator (2) and a pyrotechnic charge (3) whose combustion is triggered by said initiator; and. a second chamber (D) for diffusion into which the gas that results from combustion of said charge (3) is transferred prior to being exhausted to the outside; these two chambers (C, D) being separated from each other by a “nozzle” partition (12) presenting at least one communication orifice (13). According to the invention, said diffusion chamber (D) is provided with a piston (5) suitable for closing or not closing said orifice (13) as a function of the gas pressure in the combustion chamber (C), said piston (5) being urged to its position for closing the orifice (13) by a mass (6) of elastically deformable material, said mass (6) presenting stiffness that varies as a function of temperature, said stiffness decreasing with increasing temperature.
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Autoliv Development AB
Fleming Faye M.
Freedman Laura
Harness & Dickey & Pierce P.L.C.
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