Protective Helmet

FIG. 1 is a top perspective view of a protective helmet, showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevational view thereof, the rear elevational view being a mirror image of FIG. 3 ;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top plan view thereof.

The bottom of the protective helmet forms no part of the claimed design.

The dashed broken lines in the figures are for the purposes of illustrating portions of the protective helmet, which form no part of the claimed design.