Patent ID: 6893062

Claim:
A bumper beam for an automobile comprising in cross section: a top wall; a bottom wall opposed to said top wall; a pair of lateral walls connecting said top wall and said bottom wall at opposite ends, one of said pair of lateral walls being a collision-surface side lateral wall and the other being a vehicle-mounted-surface side lateral wall, and a connection rib provided intermediate between said top wall and said bottom wall and connecting said pair of lateral walls, wherein a thickness of said collision-surface side lateral wall is greater than a thickness of said vehicle-mounted-surface side lateral wall, and wherein both corners at opposite ends of said collision-surface side lateral wall are curved with a radius of curvature R of 0.1-0.3 of a length of said collision-surface side lateral wall, and both corners at opposite ends of said vehicle-mounted-surface side lateral wall are curved with a radius of curvature r of 0.6-2.0 of the thickness of said vehicle-mounted-surface side lateral wall.