Passenger airbag

1. An airbag for a front passenger seat, comprising:

an inlet port for inflation gas;

a main body, formed of at least one panel of fabric, and comprising a retainer adapted for mounting the airbag to a vehicle, and a passenger contact region; and

at least one tether located inside the main body and connecting the retainer to the passenger contact region so as to restrain inflation of at least a portion of the passenger contact region,

wherein the tether is attached to the fabric panel along a generally vertical line by stitches which pass through stitch holes which are located inside the main body,

wherein the tether is formed of a planar flexible material attached in a generally horizontal plane to the retainer, and in a generally vertical plane in the passenger contact region so that the tether turns 90 degrees within the airbag as the tether extends between the retainer and the passenger contact region,

wherein the tether is attached to the passenger contact region by stitching to a part of a single panel of the at least one panel of fabric which part is inside the main body, and

wherein the part comprises an internal pleat formed by folding and stitching the single panel of the at least one panel of fabric, wherein the internal pleat and the passenger contact region are formed from the single panel of the at least one panel of fabric.

2. An airbag according to claim 1 wherein the at least one tether comprises a longitudinally folded length of fabric having one end divided longitudinally, and wherein one of the divided ends is stitched in contact with one fold of the pleat and the other of the divided ends is stitched in contact with the opposite fold of the pleat.

3. An airbag for a front passenger seat, comprising:

an inlet port for inflation gas;

a main body, formed of at least one panel of fabric, and comprising a retainer adapted for mounting the airbag to a vehicle, and a passenger contact region; the airbag further comprising:

a first tether of a first length and a second tether of a second length, wherein the first length is different than the second length,

wherein the first tether and the second tether are located inside the main body and connect the retainer to two horizontally spaced and vertically oriented sections of the passenger contact region, so as to restrain inflation along two vertical lines of at least a portion of the passenger contact region,

wherein the first tether and the second tether are formed of a planar flexible material attached in a generally horizontal plane to the retainer, and in a generally vertical plane in the two horizontally spaced and vertically oriented sections of the passenger contact region so that the tether turns 90 degrees within the airbag as the tether extends between the retainer and the two horizontally spaced and vertically oriented sections of the passenger contact region,

wherein the first tether and second tether are attached to the two horizontally spaced and vertically oriented sections of the passenger contact region by stitching to a part of a single panel of the at least one panel of fabric which part is inside the main body, and

wherein the part comprises an internal pleat formed by folding and stitching the single panel of the at least one panel of fabric, wherein the internal pleat and the two horizontally spaced and vertically oriented sections of the passenger contact region are formed from the single panel of the at least one panel of fabric.

4. An airbag according to claim 1 wherein the main body is formed of two lateral side panels of fabric joined on either side of a central main fabric panel.

5. An airbag according to claim 1 which has a shape such that, when the airbag is inflated, the passenger contact region comprises two shoulder portions, one on each side of a head portion, and the shoulder portions extend further than the head portion toward the passenger relative to the retainer, one of the shoulder portions extends further than the other shoulder portion toward the passenger relative to the retainer, to form an asymmetrical airbag.

6. An airbag according to claim 1 comprising a first tether of a first length and a second tether of a second length, and wherein the first length is different to the second length.

7. An airbag according to claim 1 comprising at least one tether located inside the main body and connecting the retainer to two vertically spaced vertically oriented sections of the passenger contact region so as to restrain inflation of at least the portion of the passenger contact region.

8. An airbag according to claim 1 comprising at least one tether located inside the main body and connecting the retainer to a section of the airbag so as to restrain inflation of at least a portion of the airbag in a vertical direction.

9. An airbag according to claim 3 which has a shape such that, when the airbag is inflated, the passenger contact region comprises two shoulder portions, one on each side of a head portion, and the shoulder portions extend further than the head portion toward the passenger relative to the retainer.

10. An airbag according to claim 3 wherein the tether is formed of a planar flexible material attached in a generally horizontal plane to the retainer, and in a generally vertical plane in the passenger contact region.

11. An airbag according to claim 3 comprising at least one tether located inside the main body and connecting the retainer to a section of the airbag so as to restrain inflation of at least a portion of the airbag in a vertical direction.