US Patent 10046723 Self-adaptive, energy-absorbing bumper

A passive energy absorber to be supported by a bumper of a vehicle is disclosed. The passive energy absorber may include a base extending laterally, multiple fins, and multiple stoppers. Each fin may extend longitudinally from the base and be spaced laterally from adjacent fins to form lateral gaps therebetween. Each stopper may form, with a corresponding portion of the base, a triangular prism in a different lateral gap. The base, multiple fins, and multiple stoppers may be formed of polymeric material.