A structural member for a motor vehicle, that is selectively positioned inside of a tubular frame rail that operatively deforms to absorb and dissipate energy in the event of a collision. The structural member having a tubular body with strengthening ribs located inside of the tubular body....http://www.google.es/patents/US7063376?utm_source=gb-gplus-sharePatente US7063376 - Structural member for a vehicle frame assembly
