US Patent 7234765 Vehicle door sill

The disclosure relates to vehicles and door sills for vehicles. In one aspect, the disclosure relates to door sills having an interior channel configured to receive a retractable panel installed within a vehicle door. In another aspect, the disclosure relates to impact-absorbing door sills for motor vehicles, for example, an automobile. The disclosure also provides methods for forming a shaped composite article from a metal foam and attaching the shaped composite article to a side frame of a vehicle chassis.