Gas bag for a vehicular occupant restraint system

A gas bag for a vehicular occupant restraint system comprising two plies of fabric partially interwoven along their outer edges, wherein:

• said plies of fabric are substantially air-tight;
• the volume of the gas bag is divided by partial interweaving of said plies of fabric within said outer edges, thereby forming a plurality of chambers;
• remaining portions of the interwoven plies of fabric defining between them at least one choked port interconnecting said chambers;
• a first part of said chambers being directly inflatable by an inflator, and a second part of said chambers being indirectly inflatable via said choked port;
• the gas bag further having the following features:
• an elongated shape corresponding to the shape of the side windows of a car between the A and C pillars with an upper curved edge and a lower substantially straight edge;
• an elongated main chamber defined between said upper edge and said lower edge;
• a first chamber defined in the rear portion of the gas bag by a hem emanating from said lower edge and extending up to roughly half height of the gas bag and having a choked port to said main chamber;
• a second chamber defined in the front portion of the gas bag by a hem emanating from said lower edge and extending up to roughly a third of the height of the gas bag and having a choked port to said main chamber;
• and
• a third chamber defined in the front portion of the gas bag between said upper edge and a hem, said third chamber having a choked port to said main chamber, said third chamber having generally the shape of an elongated triangle.

A gas bag for a vehicular occupant restraint system comprising two plies of fabric partially interwoven along their outer edges, wherein:

• said plies of fabric are substantially air-tight;
• the volume of the gas bag is divided by partial interweaving of said plies of fabric within said outer edges, thereby forming a plurality of chambers;
• remaining portions of the interwoven plies of fabric defining between them at least one choked port interconnecting said chambers;
• a first part of said chambers being directly inflatable by an inflator, and a second part of said chambers being indirectly inflatable via said choked port;
• the gas bag further comprises an annular chamber extending along a complete outer circumference of said plies of fabric and has a substantially constant cross section;
• said annular chamber being interconnected with an internal chamber by choked ports being provided in several corner regions of said annular chamber.