Patent ID: 8469415
Filing Date: 2013-06-25
Classification: B60R

Abstract:
1. A bumper reinforcement formed by an extruded member made of aluminum alloy and extending in a width direction of a vehicle, the bumper reinforcement including end portions in the width direction of the vehicle, the end portions being connected to a connecting member extending in a longitudinal direction of the vehicle, the bumper reinforcement comprising: a main wall extending in a first direction perpendicular to the width direction; first and second walls protruding from first and second ends, respectively, of the main wall in the first direction to extend toward an interior side of the vehicle in the longitudinal direction; flanges protruding from respective ends of the first and second walls along the first direction to face each other, the respective ends being located at the interior side of the vehicle in the longitudinal direction; the main wall, the first and second walls, and the flanges being integrally formed with one another, and gradually narrowing portions formed, in the width direction, at end portions of each of the first and second walls; wherein respective protruding lengths of the first and second walls protruding toward the interior side of the vehicle in the longitudinal direction are designed to gradually decrease from an intermediate portion of the bumper reinforcement to the end portions of the bumper reinforcement in the width direction to form the gradually narrowing portions; and wherein respective protruding lengths of the flanges protruding along the first direction increase as respective protruding lengths of the gradually narrowing portions extending toward the interior side of the vehicle in the longitudinal direction gradually decrease from the intermediate portion to the end portions of the bumper reinforcement in the width direction.