Safety helmet for motorcyclist has rigid outer shell provided with machined groove for defining deformable region providing shock absorbing characteristic

摘要

The safety helmet has a rigid outer shell (1) provided with at least one deformable region defined by a localised reduction in the material thickness, for providing a shock-absorbing characteristic. The localised reduction in the material thickness of the helmet outer shell (1) is provided by a machined groove (5) extending in a ring on the inside of a curved section of the helmet.