Adaptive pyrotechnic gas generator for airbag, with neutralizing device
First Claim
1. Adaptive pyrotechnic gas generator (1) intended to inflate an airbag that can be used in automotive safety, comprising a body (2) containing at least two combustion chambers (5, 6) separated from one another by an impervious partition (4), each of these two combustion chambers (5, 6) having at least one pyrotechnic charge (7, 8), an independent ignition system (41, 42) and being equipped with gas-ejection nozzles (29, 30) which are initially closed off, characterized in that the generator (1) comprises a device for neutralizing the pyrotechnic charges (7, 8) of these two combustion chambers (5, 6) following operational inflation of the airbag, this neutralization device comprising a means for providing communication between the two combustion chambers (5, 6) and a means of initiating one of the two pyrotechnic charges (7, 8), these two means being triggered by the firing of one of the two pyrotechnic charges (7, 8).
1 Assignment
0 Petitions
Accused Products
Abstract
The generator (1) comprises a hollow cylindrical body (2) comprising a side wall (3) in which is crimped an impervious transverse partition (4) which separates an upstream combustion chamber (5) from a downstream combustion chamber (6), each combustion chamber (5, 6) having a pyrotechnic charge (7, 8). A neutralizing device consists, on the one hand, of a delay tube (21) fixed into the impervious transverse partition (4) and, on the other hand, of a pyrotechnic mixture (24) contained in the said delay tube (21). A safety assembly (31) is fitted around the necked region (28) and has pre-cut regions covering the combustion gases ejection nozzles.
This adaptive pyrotechnic gas generator is intended to inflate an airbag and guarantees that any pyrotechnic substance is eliminated after operation.
18 Citations
10 Claims
- 1. Adaptive pyrotechnic gas generator (1) intended to inflate an airbag that can be used in automotive safety, comprising a body (2) containing at least two combustion chambers (5, 6) separated from one another by an impervious partition (4), each of these two combustion chambers (5, 6) having at least one pyrotechnic charge (7, 8), an independent ignition system (41, 42) and being equipped with gas-ejection nozzles (29, 30) which are initially closed off, characterized in that the generator (1) comprises a device for neutralizing the pyrotechnic charges (7, 8) of these two combustion chambers (5, 6) following operational inflation of the airbag, this neutralization device comprising a means for providing communication between the two combustion chambers (5, 6) and a means of initiating one of the two pyrotechnic charges (7, 8), these two means being triggered by the firing of one of the two pyrotechnic charges (7, 8).
Specification