(19) United States
(12) Patent Application Publication (io) Pub. No.: US 2003/0034637 Al
Wang et al. (43) Pub. Date: Feb. 20,2003
A two or more chambered airbag provides much improved salety and/or performance. A modified single chamber airbag can be used as the primary chamber ol the two-chamber airbag. A piece ol labric ol appropriate size is sewn to the inside or outside surface ol the front panel ol the primary chamber to create the secondary chamber. One or more apertures are opened between the primary and secondary chambers. In order for the secondary chamber to inflate properly, the tethers ol the primary chamber are shortened to 50% to 80% ol their original length. The size or location ol the tether sewing to the inner surface ol the front panel ol the primary chamber is also adjusted to create a desired shape ol the secondary chamber when deployed.