Patent ID: 7090245

Claim:
A leg protection system for protecting a leg of an occupant, comprising: one airbag for protecting an ankle and a knee of the occupant, the airbag comprising a first chamber, a second chamber separate from the first chamber, and at least one duct connecting the first chamber and the second chamber for providing communication therebetween; and an inflator connected to the airbag for inflating the airbag, wherein said first and second chambers are spaced apart from each other by a predetermined distance, and are connected together by the at least one duct, said at least one duct having a width less than those of the first and second chambers; said one airbag comprises a front panel and a rear panel joined together along a first connection at peripheries thereof, and along second connections at a middle portion between the front panel and the rear panel in a vertical direction, respectively, so as to divide the one airbag into the first chamber, the second chamber, and the at least one duct; said second connections extend toward a center area of the airbag from left and right sides between the front panel and the rear panel in the vertical direction; each of the second connections has a substantially U-shape with one side extending vertically and two other sides extending laterally parallel to an upper side and a lower side of the front panel and the rear panel; wherein in each U-shaped connection, the one vertical side extends continuously between the two other sides; the vertically extending sides face each other at the middle portion of the front panel and the rear panel in the lateral direction; and a space between the vertically extending sides defines one duct.