US Patent 11066033 Seat-mounted occupant restraint system

A restraint system for helping to protect an occupant of a vehicle having a roof and a cabin with a seat for the occupant includes an airbag having a stored condition within a base of the vehicle seat and being inflatable to deploy upwards in the cabin and between legs of the occupant to a deployed condition in front of the occupant. The airbag including a lower end having a pair of projections spaced apart in a forward-rearward direction of the vehicle. The airbag being configured to utilize the vehicle seat as a reaction surface for restraining the movement of the airbag in response to occupant penetration into the airbag.