Patent ID: 8511708

Claim:
An airbag module comprising: a housing for facing an occupant seated in a passenger seat of a vehicle; an inflator fixed to a lower portion of the housing to generate gas pressure according to a control signal transmitted from an electronic control unit; an airbag cushion folded in the housing in such a manner that the airbag cushion is expanded in a form of a dual chamber by the gas pressure generated from the inflator, the airbag cushion including a main wall and a pair of side walls; and a tether provided in the airbag having a rectangular shape corresponding to a sectional shape of the airbag cushion, the tether installed in a transverse direction to divide the airbag cushion into an upper chamber and a lower chamber, the tether including transfer holes formed at edges of the tether to transfer gas pressure from the upper chamber to the lower chamber in correspondence with gas pressure variation, the transfer holes are formed at corners of the tether such that the transfer holes extend to an external wall of the airbag cushion; wherein the inflator is in communication with the upper chamber for directly inflating the upper chamber and indirectly inflating the lower chamber through the transfer holes such that the lower chamber is deployed from the corners; and wherein each of the transfer holes is formed at an intersection of the main wall and one of the pair of side walls.