Patent ID: 7637534
Filing Date: 2009-12-29
Classification: B60R,Y10T

Abstract:
1. A cold gas generator for inflating a gas bag by a stored gas flowing out of a gas pressure vessel assembly comprising a gas pressure vessel ( 7 ) provided with a discharge opening ( 1 ) which is closed off by a destructible membrane ( 2 ) which is arched in a direction which is opposite relative to the stored gas, and an opening mechanism comprising a primer ( 4 ) and a nozzle chamber ( 5 ), destruction of the membrane ( 2 ) occurring by internal pressure of the stored gas in the gas pressure vessel ( 7 ) after thermal weakening of the membrane ( 2 ) caused by a hot gas jet of the opening mechanism aimed at the membrane ( 2 ), which jet is exclusively produced by the ignition of the primer ( 4 ) which can be activated by application of an electric pulse, characterized in that the gas pressure vessel assembly is an independent and separable component, further characterized in that, in a filled state of the gas pressure vessel ( 7 ), a surface ( 6 a ) of the membrane ( 2 ) which is averted from the same stored gas is directed fully and in an exposed manner into a room ( 12 ) which surrounds a portion of the gas-pressure vessel assembly including the discharge opening ( 1 ) and membrane ( 2 ), and which is in communication with a gas bag via at least one discharge opening ( 11 ) in the room ( 12 ) and through which the hot gas jet is guided which is focused on the membrane ( 2 ) via a nozzle chamber ( 5 ), further characterized in that the distance between the uppermost point of the membrane ( 2 ) and a discharge opening ( 13 ) of the nozzle chamber ( 5 ) is substantially smaller than the diameter of the smallest discharge opening ( 1 ) of the gas pressure vessel ( 7 ).