Protective helmet

1. A protective helmet comprising:

an outer shell;

one or more absorption elements of impact shock energy operatively coupled with said outer shell,

wherein said one or more absorption elements are shaped with a geometric configuration which extends along a development axis such as to define a pair of end portions opposite to each other;

said protective helmet wherein said one or more absorption elements comprise a working portion interposed between said end portions,

wherein a section of said working portion along a surface transverse to said development axis has an area smaller than areas of corresponding sections of said end portions, and

wherein said one or more absorption elements have a breaking load lower than the breaking load of said outer shell, so that in the event of an impact said working portion is subject to breaking before said outer shell and before said end portions to allow the absorption of the impact shock energy.

2. The protective helmet according to claim 1 , wherein said sections of said end portions have a different area and/or conformation.

3. The protective helmet according to claim 1 , wherein said one or more absorption elements have an asymmetrical configuration with respect to said development axis.

4. The protective helmet according to claim 1 , wherein said one or more absorption elements are coupled with a support element at one of said end portions so as to define a single absorption element.

5. The protective helmet according to claim 1 , wherein said support element is coupled with said outer shell by means of a surface provided with a same curvature as said outer shell.

6. The protective helmet according to claim 1 , wherein said one or more absorption elements are hourglass-shaped.

7. The protective helmet according to claim 1 , wherein said one or more absorption elements have a cylindrical conformation provided with one or more holes at the working portion,

wherein said one or more holes are transverse and/or axial to said development axis.

8. The protective helmet according to claim 1 , wherein the protective helmet comprises an inner lining,

wherein said one or more absorption elements are interposed between said outer shell and said inner lining.

9. The protective helmet according to claim 1 , wherein the protective helmet comprises an inner lining coupled with said outer shell,

wherein said one or more absorption elements are coupled with said inner lining, so that said inner lining is interposed between said outer shell and said one or more absorption elements.

10. The protective helmet according to claim 1 , wherein the protective helmet comprises a coating shell, wherein said coating shell is superimposed on said outer shell.

11. The protective helmet according to claim 10 , wherein said coating shell is provided with one or more notches, preferably defined along the inner surface (of said coating shell at said outer shell, able to define a predefined breaking scheme in the event of an impact.

12. The protective helmet according to claim 10 , wherein said coating shell has a breaking load lower than said outer shell, and

wherein said one or more absorption elements have a breaking load lower than or equal to the breaking load of said coating shell, so that in the event of an impact the working portion is subject to breaking before said coating shell or together with the breaking of at least a portion of said coating shell for the collapse of said coating shell towards said outer shell.

13. The protective helmet according to claim 10 , wherein said coating shell is coupled with said outer shell or to said one or more absorption elements in a removable manner.

14. The protective helmet according to claim 1 , wherein the protective helmet comprises a coating shell,

wherein said one or more absorption elements are interposed between said outer shell and said coating shell.