Patent ID: 7938476

Claim:
A frame structure for a motor vehicle, comprising: a longitudinal beam having a cavity; a bumper carrier; and a crashbox attaching the bumper carrier to the longitudinal beam, the crashbox including: a main section configured to compress in a longitudinal direction of the motor vehicle; and a spigot member extending from the main section in the longitudinal direction of the motor vehicle, the spigot member being inserted into the cavity of the longitudinal beam, the spigot member including: a sleeve adapted for attachment to the longitudinal beam, the sleeve having an internal cavity, the sleeve being configured to spread in a lateral direction of the motor vehicle when attached to the longitudinal beam, and the sleeve having side walls that contact the longitudinal beam; and an H-profile piece configured for insertion into the internal cavity of the sleeve and attached to the sleeve, the H-profile piece including a weak region configured to break to permit expansion of the H-profile piece in the lateral direction of the motor vehicle when the sleeve expands, the H-profile piece being further configured to substantially inhibit compression of the sleeve in the lateral direction of the motor vehicle, wherein the weak region is broken and the H-profile piece has been expanded.