US Patent 10588373 Protective helmet

A protective helmet for the head of a human being includes an outer protective shell and an inner support structure that includes a headband defining a head-accommodating opening as well as a upper head support; on the headband, the support structure has a forehead-accommodating side and a side accommodating the back of the head; the support structure is secured to the protective shell using at least one force-transmitting connector. A longitudinal adjuster which is arranged between the protective shell and the support structure allows the protective shell to be adjusted relative to the support structure in the direction of the forehead-accommodating side or in the direction of the side accommodating the back of the head.