Patent ID: 8905206

Claim:
A polymeric crash box ( 10 ) for a motor vehicle, said polymeric crash box ( 10 ) comprising: a substantially alveolar structure ( 20 ) with a first open frontal extremity ( 12 ) and a second rear extremity ( 14 ), said substantially alveolar structure ( 20 ) being a molded one-piece structure comprised of i) a first plurality of channels ( 30 ), and ii) second plurality of channels ( 40 ), said first and second plurality of channels together being a molded one-piece structure, wherein said first plurality of channels ( 30 ) each have a longitudinal axis ( 95 ) and extend internally to said polymeric crash box ( 10 ) starting from said first open frontal extremity ( 12 ) towards said second rear extremity ( 14 ), wherein each channel ( 30 ) of said first plurality of channels ( 30 ) are internally tapered towards said second rear extremity ( 14 ), wherein said first plurality of channels ( 30 ) comprise a plurality of first walls ( 32 ), each said first wall ( 32 ) being a shared wall of two adjacent channels ( 30 ) of said first plurality of channels ( 30 ), wherein said second plurality of channels ( 40 ) extend starting from said second rear extremity ( 14 ) towards said first open frontal extremity ( 12 ), wherein each channel ( 40 ) of said second plurality of channels ( 40 ) is internally tapered towards said first open frontal extremity ( 12 ), wherein said first plurality of channels ( 30 ) further comprises a plurality of second walls ( 34 ) each of which is a wall of a correspondent channel ( 40 ) of said second plurality of channels ( 40 ), and each channel ( 40 ) of said second plurality of channels ( 40 ) comprises only a plurality of said second walls ( 34 ), wherein each second wall ( 34 ) has a thickness substantially constant along the longitudinal axis ( 95 ), while each first wall ( 32 ) has has a thickness growing towards said second rear extremity ( 14 ), and each second wall ( 34 ) is substantially inclined, with respect to the longitudinal axis ( 95 ) of a correspondent channel ( 40 ) of said second plurality of channels ( 40 ).