Abstract: An apparatus includes an airbag configured to be mounted to a roof of a vehicle and deployable downward from the vehicle roof. The airbag has a stored condition in which the airbag is deflated and concealed behind a vehicle headliner. The airbag has an inflated and deployed condition in which a first portion is configured to extend along a portion of a windshield, a second portion is configured to extend rearward from the first portion toward an occupant, and a third portion is configured to extend downward from the second portion and to be positioned between the occupant and a display screen. A deployment tether is configured to initially delay deployment of the second portion of the airbag while the third portion deploys. The deployment tether is configured to rupture after the initial delay so the second portion can fully inflate and deploy.

Abstract: A tether actuation unit includes an actuator configured to form a connection with a tether that is releasable in response to actuation of the actuator, and a housing configured to receive the actuator. The housing includes a tether channel configured to allow the tether to extend therethrough. The tether channel includes sidewalls configured to receive and engage the tether along a portion of its length when the tether extends at an angle from the housing. The sidewalls of the tether channel are configured to limit movement of the tether in response to airbag deployment in order to limit tension applied to the actuator by the tether to a predetermined range of non-orthogonal directions with respect to a central axis of the actuator.

Abstract: A tether actuation unit includes an actuator configured to form a connection with a tether that is releasable in response to actuation of the actuator, and a housing configured to receive the actuator. The housing includes a tether channel configured to allow the tether to extend therethrough. The tether channel includes sidewalls configured to receive and engage the tether along a portion of its length when the tether extends at an angle from the housing. The sidewalls of the tether channel are configured to limit movement of the tether in response to airbag deployment in order to limit tension applied to the actuator by the tether to a predetermined range of non-orthogonal directions with respect to a central axis of the actuator.