PROTECTIVE HELMET Russian patent published in 2003 - IPC

FIELD: safety equipment, in particular, devices for protecting user's head from impacts. SUBSTANCE: protective helmet has outer enclosure and plastic casing inserted into outer enclosure. Plastic casing is composed of lower and upper parts inserted into one another and provided with trapezium-shaped slots and ridges. Side walls of trapezium-shaped ridges of upper and lower parts of casing are inclined at different angles. Ridges of casing upper and lower parts are provided with openings and side faces have air access holes. EFFECT: simplified construction and improved protective characteristics of helmet. 4 dwg