Patent ID: 8714603

Claim:
An energy absorber installed between a bumper cover and a back beam of a vehicle to absorb a collision energy, the energy absorber comprising: a top absorption part extending in a lateral direction of the vehicle, the top absorption part being oriented such that a first surface and a second surface thereof respectively face the bumper cover and the back beam; a bottom absorption part disposed below the top absorption part, the bottom absorption part having a first surface and a second surface that are respectively oriented in same directions as the first and second surfaces of the top absorption part; and a medial absorption part connecting the top absorption part to the bottom absorption part; wherein the top and bottom absorption parts and the medial absorption part form a single body having an I-shaped cross-sectional shape, and the single body type energy absorber including the top and bottom absorption parts and the medial absorption part matches the height of the back beam along a length of the back beam; and wherein shapes of the top absorption part, the bottom absorption part and the medial absorption part satisfy Equations 1 and 2 as follows: 2 mm< R/H 1 or R/H 2<4 mm Equation 1) 2 mm< D/T 1 or D/T 2<4 mm Equation 2) where, R denotes a length from the first surface of the top or bottom absorption part to the second surface thereof, H 1 denotes a length from the first surface of the top or bottom absorption part to the medial absorption part, H 2 denotes a length from the second surface of the top or bottom absorption part to the medial absorption part, D denotes a height from a top surface of the top absorption part to a bottom surface of the bottom absorption part, T 1 denotes a thickness of the top absorption part, and T 2 denotes a thickness of the bottom absorption part.