Abstract: A device to direct on the vizor the central part of the air flow entering from the helmet's front grating, while the other two air flows entering through lateral slots (12,12') are directed sidewise. The entry of the lateral air flows can be adjusted by means of hinged valves (30) made of flexible plastic material, the hinged ends of said valves being oriented toward the center line of the helmet, the valves being shifted by sliders (50) engaging with inclined plane (34) of the valves themselves.

Abstract: The chin piece of a helmet (A) having a visor has a horizontal channel to convey air from apertures to the interior of the helmet and, specifically, to strike the inner surface of the visor to avoid fogging of the visor. The helmet also has side intercepting elements. Each intercepting element is a rotating non-projecting cap to convey air into or from the interior of helmet or to close air communication. An aperture in the top of the helmet increases air circulation and is covered for suction discharge of air to the exterior.

Abstract: A ski attachment device having a safty feature that allows disengagement of the boot from the ski in the case of lateral or front falls of the skier. The device comprises a rear unit adapted to be attached to the ski and including a spring for applying a longitudinal forward thrust to the rear of the boot. A front unit includes a plate having a "V" shaped seat to be engaged by a grooved rotatable roller housed in a cavity in a sole of the boot.

Abstract: A protective device can be applied movably to the lower part of helmet (A); it is provided with a folding envelope (B) fitted preferably to the rear part of the helmet and apt to contain a flexible protective screen (C) which, when extracted from the envelope can be fitted in the helmet's lower part to provide protection against weather conditions.Protective screen (C), in its position of use, is retained on helmet (A) by means of movable securing elements (24) between the lower edge of helmet (A) and the top edge of protective screen (C) so that when the screen is not in use it may be removed from the front part of the helmet, folded and contained in envelope (B).

Abstract: A boot, particularly for sports use, consisting of a boot to which a legging is coupled by an articulation and houses an internal element. The boot includes a vamp which is provided with a legging which holds, at the height of the malleolus of the wearer's foot, articulated elements which hinge to the legging of the vamp pairs of perforated appendices in the lower part of two semi-leggings movably secured to each other by securing devices.