| 主权项 |
1. An airbag assembly comprising:
a housing configured to be mounted in a dashboard of a vehicle at a first position; an inflator; and an airbag cushion that comprises:
a first cushion portion coupled to the inflator and defining a first inflatable chamber to receive inflation gas from the inflator to expand the first cushion portion from a compact state to a deployed state, wherein the first cushion portion is configured to deploy from the housing and, in the deployed state when the housing is mounted in the dashboard of the vehicle at the first position, to cover a first portion of the dashboard to receive a torso of a vehicle occupant moving from a vehicle occupant position primarily in a forward direction relative to the vehicle;a second cushion portion connected to the first cushion portion and defining a second inflatable chamber to receive the inflation gas from the first inflatable chamber to expand the second cushion portion from a compact state to a deployed state, wherein the second cushion portion, in the deployed state and when the housing is mounted in the dashboard of the vehicle at the first position, covers a second portion of the dashboard that is laterally spaced from the first portion of the dashboard; anda unidirectional vent comprising:
one or more apertures providing fluid communication between the first inflatable chamber to the second inflatable chamber; anda gas guide comprising a sleeve disposed around the one or more apertures and extending into the second inflatable chamber, the gas guide configured to expand to allow the inflation gas to vent through the one or more apertures into the second inflatable chamber and configured to collapse upon equalization of inflation gas pressure within the second inflatable chamber with inflation gas pressure within the first inflatable chamber, wherein the collapsed sleeve obstructs the one or more apertures and prevents backflow of the inflation gas into the first inflatable chamber from the second inflatable chamber; anda strap extending across an aperture of the one or more apertures between the gas guide and the first inflatable chamber to limit the sleeve of the gas guide from inverting through the aperture of the one or more apertures into the first inflatable cushion, the strap having a length greater than a diameter of the aperture and a width less than the diameter of the aperture, the strap comprising a first end and a second end, the first end of the strap attached to a wall within the second inflatable chamber and the second end attached to the wall within the second inflatable chamber and across the aperture from the first end. |
