Patent ID: 7938463

Claim:
A bumper apparatus with a multistage energy absorbing structure comprising: a back beam securely mounted to a car body; a rear shock absorber securely mounted to a front surface of the back beam, the rear shock absorber comprising at least a rear shock absorbing unit formed substantially on a middle portion and in a longitudinal direction thereof and an absorber body securely covering the front surface of the back beam and supporting the at least a rear shock absorbing unit; a front shock absorber securely mounted to a front surface of the rear shock absorber and covering the at least a rear shock absorbing unit; and a bumper cover securely mounted to the front shock absorber; wherein the rear shock absorbing unit comprises at least two-stepped protrusion protruding forwards from the rear shock absorber, the at least two-stepped protrusion being telescopically deformable toward the back beam when an external shock is applied to the bumper cover, and one of the at least two-stepped protrusion has an asymmetrical structure with an inclined surface defined on an upper edge of the absorber body and a right-angled surface defined on a lower edge of the absorber body when the external shock is not applied to the bumper cover; and wherein the front shock absorber has a hollow semicircular or hollow oval cross-section and surface thereof includes a mesh structure.