BODY OF PROTECTIVE HELMET AND METHOD FOR ITS MANUFACTURE Russian patent published in 2005 - IPC

FIELD: development of protective helmets.

SUBSTANCE: the body includes an envelope of successively placed layers of polygon-shaped fabric fastened by a binder. One of each pair of layers is made with cuts in the form of figure "Y" coming from the angles of the polygon to the center, and the subsequent layer has the shape of a star, the axes of symmetry of each ray of the star are positioned between the adjacent cuts of the polygon. The method for manufacture of the protective helmet body includes location and spacing of blanks of fabric, compaction of the successively laid layers with the binder at heating and pressure in a mould. The layers are laid out in pairs. At location and spacing of the blankets, the area of the blank in the form of a "star" is determined by formula: S_s-S_p-n(S_lx2), where S_s-the area of the blank in the form of a star; S_p - the area of the polygon with cuts; S_l - the area of the lap at bending of the polygon in cuts at a lay-out; n-the quantity of the star rays.

EFFECT: provided reliable protection of the head at impact loads at a low weight of the helmet.

3 cl, 4 dwg, 1 ex