US Patent 8739318 Helmet comprising an occipital adjustment mechanism

A hockey or lacrosse helmet having a front shell; a rear shell having an elongated slot extending along a longitudinal axis of the helmet; a rear inner pad for facing the back and left and right side regions of the head, the rear inner pad being mounted to the rear shell; an occipital inner pad located below the rear inner pad for facing the occipital region of the head; a central member extending along the longitudinal axis of the helmet, the central member having an upper part hingedly mounted with respect to the rear shell and a lower part mounted to the occipital inner pad; and a single wedging member located between the rear shell and the central member, the single wedging member being movable along the longitudinal axis of the helmet from a first position to a second position.