Patent attributes
An internal part of an airbag is partitioned into a first chamber and a second chamber by first and second inner panels. Each of outer peripheral edge portions of the inner panels is stitched by a tear seam. Overhanging portions protrude from outer peripheries of each of the first and second inner panels, and each of the overhanging portions is stitched by a seam. The thickness of the airbag is relatively small by a continuum of the first inner panel and the second inner panel until the internal pressure of the first chamber reaches a predetermined pressure. At the predetermined pressure, the tear seam is broken, and each of the first and second inner panels is separated resulting in an increase in the thickness of the airbag. The airbag sufficiently absorbs the impact of the occupant, and does so in a relatively soft manner.
