Abstract: A football helmet is disclosed that includes a shell constructed of fiber reinforced epoxy resin, a liner made from expanded polypropylene, an impact absorbing layer situated between the liner and the shell, and a face guard. The impact absorbing layer is constructed from either expanded polypropylene or a viscoelastic polymer encased in a suitable thin yet resilient and elastic membrane. An optional impact absorbing band is also shown disposed around the inner periphery of the liner and encircling the player's head. The impact absorbing band serves to reduce impact forces occurring from side helmet impact with objects or players.

Abstract: A football helmet is disclosed that includes a shell constructed of fiber reinforced epoxy resin, a thin resilient outer liner adjacent the inner shell surface, a thicker resilient middle liner and a thin resilient inner liner. The three liners are preferably fabricated from expanded polypropylene or suitable substitute having comparable resilient energy absorbing properties. The inner and outer liners are made from higher impact absorbing material than the impact absorbing material of the middle liner. The helmet also includes fitment pads, jaw pads, a face mask, and moisture absorbing cloth material.

Abstract: A football helmet is disclosed that includes a shell constructed of fiber reinforced epoxy resin, a liner made from expanded polypropylene, an impact absorbing layer situated between the liner and the shell, and a face guard. The impact absorbing layer is constructed from either expanded polypropylene or a viscoelastic polymer encased in a suitable thin yet resilient and elastic membrane. An optional impact absorbing band is also shown disposed around the inner periphery of the liner and encircling the player's head. The impact absorbing band serves to reduce impact forces occurring from side helmet impact with objects or players.