Air bag with conical portion

1. An inflatable vehicle occupant protection device comprising:

a front panel and a rear panel that are interconnected to at least partially define an inflatable volume of the protection device, the rear panel having a conical configuration in a side view resulting from portions of the rear panel being interconnected with each other, wherein the rear panel, prior to being interconnected has one of a round, elliptical, and ovular configuration in a plan view.

2. The protection device recited in claim 1 , wherein the protection device comprises a driver frontal air bag, the rear panel connecting the protection device to a vehicle steering wheel.

3. The protection device recited in claim 1 , wherein the conical configuration comprises a frusto-conical configuration.

4. The protection device recited in claim 1 , wherein the conical configuration comprises one of a right conical configuration and an oblique conical configuration.

5. The protection device recited in claim 1 , wherein the conical configuration comprises a base having a shape that is one of circular, elliptical, ovular, and irregularly shaped.

6. The protection device recited in claim 1 , wherein the front panel has a single piece fabric construction and the rear panel has a single piece fabric construction, the inflatable volume of the protection device being defined entirely by these two single pieces of fabric.

7. An inflatable vehicle occupant protection device comprising:

a front panel and a rear panel that are interconnected to at least partially define an inflatable volume of the protection device, the rear panel having a conical configuration in a side view resulting from portions of the rear panel being interconnected with each other, wherein the rear panel, prior to being interconnected comprises at least one of round, elliptical, and ovular lobes in a plan view.

8. An inflatable vehicle occupant protection device comprising:

a front panel and a rear panel that are interconnected to at least partially define an inflatable volume of the protection device, the rear panel having a conical configuration resulting from portions of the rear panel being interconnected with each other, wherein the rear panel has a cutout portion that defines first and second radially extending edge portions of the rear panel, the interconnected portions of the rear panel comprising the first and second edge portions.

9. The protection device recited in claim 8 , wherein the cutout portion has the general form of an angular wedge, the first and second edge portions comprising angularly extending edge portions of the wedge.

10. The protection device recited in claim 8 , wherein the rear panel has a first dimension associated with a length of a portion of the rear panel extending along a line that bisects an angle between the first and second edge portions, the first dimension helping to determine the inflated reach and depth of an upper portion of the protection device.

11. The protection device recited in claim 8 , wherein the rear panel has a second dimension associated with the length of the first and second edge portions, the second dimension helping to determine the inflated reach and depth of a lower portion of the protection device.

12. The protection device recited in claim 8 , wherein the rear panel has a third dimension associated with the angle between the first and second edge portions, the third dimension helping to determine the inflated depth of both the upper and lower portions of the protection device.

13. The protection device recited in claim 8 , wherein the rear panel has a peripheral edge portion that extends from a radial end of the first edge portion to a radial end of the second edge portion, and the front panel has a peripheral edge portion that extends around an entire peripheral edge portion of the front panel, the peripheral edge portion of the rear panel having a length that is substantially equal to a length of the peripheral edge portion of the front panel.

14. The protection device recited in claim 8 , wherein the rear panel comprises a first inflator receiving portion at an end of the first edge portion, a second inflator receiving portion at the end of the second edge portion, and a third inflator receiving portion positioned between the first and second inflator receiving portions, the first and second inflator receiving portions moving into overlying alignment with each other and with the third inflator receiving portion when the portions of the rear panel are interconnected.

15. The protection device recited in claim 14 , further comprising a first slit in rear panel located between first and third inflator receiving portions, and a second slit in rear panel located between second and third inflator receiving portions, the first and second slits permitting the first and second inflator receiving portions to move into alignment with each other and with third inflator receiving portion when the portions of the rear panel are interconnected.

16. An inflatable vehicle occupant protection device comprising:

a front panel and a rear panel that are interconnected to at least partially define an inflatable volume of the protection device, the rear panel having a conical configuration resulting from portions of the rear panel being interconnected with each other, wherein the rear panel comprises a first inflator receiving portion, a second inflator receiving portion, and a third inflator receiving portion positioned between the first and second inflator receiving portions, a first slit in the rear panel being located between the first and third inflator receiving portions, a second slit in the rear panel being located between second and third inflator receiving portions, the first and second slits permitting the first and second inflator receiving portions to move into overlying alignment with each other and with the third inflator receiving portion when the portions of the rear panel are interconnected.