Abstract: An apparatus (10) helps protect an occupant of a vehicle. The apparatus (10) includes a knee bolster (22), an inflatable device (30), an actuatable inflator (40), and a flexible tether (50). The knee bolster (22) is movable in the vehicle from a stored position adjacent to an instrument panel (14) of the vehicle to an actuated position to engage a knee of the occupant of the vehicle. The inflatable device (30) moves the knee bolster (22) from the stored position to the actuated position. The inflatable device (30) inflates in a first direction toward the knees of the vehicle occupant. The inflator (40) inflates the inflatable device (30). The tether (50) limits movement of the knee bolster (22) in the first direction and positions the knee bolster in the actuated position. The tether (50) engages an exterior central surface portion (32) of the inflatable device (30) and restricts inflation of the central surface portion (32) of the inflatable device.

Abstract: A steering wheel assembly (10) mounts on a vehicle steering shaft (14) which has a threaded end portion (18). The steering wheel assembly (10) comprises a steering wheel armature (20), an inflatable vehicle occupant protection device (80) supported on the steering wheel armature (20), an inflator (90) for providing inflation fluid for inflating the inflatable vehicle occupant protection device (80), a hub (160) fixedly attached to the steering wheel armature (20) and for non-rotatable attachment to the steering shaft (14), and a rotatable fastener (180) rotatably supported on the hub (160) for axially forcing the hub onto the steering shaft (14) upon rotation of the fastener in a first direction. The fastener (180) has a first end portion (182) including gearing (190) for rotating the fastener and a second end portion (184) for threadedly engaging the threaded end portion (18) of the steering shaft (14) upon rotation of the fastener.