The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 07, 2010
Filed:
Oct. 19, 2005
Xavier Abaziou, Landerneau, FR;
Xavier Abaziou, Landerneau, FR;
Autoliv Development AB, Vargarda, DE;
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 () and a pyrotechnic charge () 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 () is transferred prior to being exhausted to the outside; these two chambers (C, D) being separated from each other by a 'nozzle' partition () presenting at least one communication orifice (). According to the invention, said diffusion chamber (D) is provided with a piston () suitable for closing or not closing said orifice () as a function of the gas pressure in the combustion chamber (C), said piston () being urged to its position for closing the orifice () by a mass () of elastically deformable material, said mass () presenting stiffness that varies as a function of temperature, said stiffness decreasing with increasing temperature.