Patent ID: 8152199

Claim:
An occupant protection apparatus comprising: an inflatable airbag with a panel, the panel including a first vent opening to enable escape of inflation fluid out of the airbag; a valve sheet including a main valve sheet portion and an envelope, wherein the main valve sheet portion includes a second vent opening movable relative to the first vent opening, wherein the envelope is positioned over a section of the main valve sheet portion to overlap the valve sheet, wherein the envelope includes a third vent opening alignable with the first vent opening; and a tear tab extending from a portion of the valve sheet to temporarily retain the valve sheet to the panel, the tear tab breaking when the airbag is inflated to a predetermined inflation level to move the second vent opening relative to the first vent opening, wherein the tear tab originates from the second vent opening and extends through the third vent opening in the envelope.