Inflator assembly

B - Operations – Transporting – 60 – R

Patent

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Details

B60R 21/26 (2006.01)

Patent

CA 2133940

An apparatus (10) for inflating an inflatable device, such as an air bag (12) for restraining a vehicle occupant, comprises a pressure vessel (40), an ignitable propellant material (154) and a cup member (150). The pressure vessel (40) defines a sealed storage chamber (44) containing inflation fluid for inflating the inflatable device. The propellant material (154) produces combustion products including heat and gas for augmenting the inflation fluid in the storage chamber (44). The cup member (150) has a piston portion (290) which is movable between an unactuated position and an actuated position. The piston portion (290) of the cup member includes a plunger portion (160) which opens the pressure vessel (40) upon movement of the piston portion (290) from the unactuated position to the actuated position. The cup member (150) further has a rupturable portion (178) which holds the piston portion (290) in the unactuated position. The apparatus further includes an igniter (152) for igniting the propellant material (154) and for causing pressure to develop a thrust against the cup member (150). The thrust ruptures the rupturable portion (178) of the cup member (150) and propels the piston portion (290) from the unactuated position to the actuated position.

Un appareil (10) pour gonfler un dispositif gonflable, tel qu'un sac gonflable (12) pour retenir un occupant de véhicule, comprend un récipient sous pression (40), une substance propulsive inflammable (154) et une coupelle (150). Le récipient sous pression (40) désigne une enceinte de stockage close (44) contenant un liquide de gonflage pour gonfler le dispositif gonflable. La substance propulsive (154) génère des produits de combustion y compris de la chaleur et du gaz, pour dilater le liquide de gonflage dans l'enceinte de stockage (44). La coupelle (150) a un piston (290) qui est mobile entre une position non actionnée et une position actionnée. Le piston (290) de la coupelle comprend un plongeur (160) qui ouvre le récipient sous pression (40) à la suite du mouvement du piston (290) de la position non actionnée à la position actionnée. La coupelle (150) a également une partie cassable (178) qui retient le piston (290) dans la position non actionnée. L'appareil comprend également un allumeur (152) pour enflammer la substance propulsive (154) et forcer la pression à pousser contre la coupelle (150). La poussée brise la partie cassable (178) de la coupelle (150) et propulse le piston (290) de la position non actionnée à la position actionnée.

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