Patent ID: 8579362

Claim:
A polymeric crash box ( 10 ) for a motor vehicle, comprising: a first open frontal extremity ( 12 ); a second rear extremity ( 14 ); a substantially alveolar structure ( 20 ) defined by a plurality of channels ( 30 ) realized in one piece, each of which has a substantially hexagonal cross section, said plurality of channels ( 30 ) extending internally to said crash box ( 10 ) starting from said first open frontal extremity ( 12 ) towards said second rear extremity ( 14 ); and stiffening means ( 50 ) of said second rear extremity ( 14 ) configured to stiffen said plurality of channels ( 30 ) only in proximity of said second rear extremity ( 14 ), the stiffening means being made from polymeric material and being formed from at least one inclined stiffening portion directly integrated with said second rear extremity ( 14 ), wherein at least a part of said plurality of channels ( 30 ) tapers internally going towards said second rear extremity ( 14 ).