Abstract: A protective helmet has one or more air guiding members configured to place in fluid communication at least one area of the helmet with several ventilation ports for output/expulsion of air to define an area for the passage of air flow independent from, and/or isolated, and/or not in fluid communication with, other areas for the passage of air flows in the helmet.

Abstract: A frame for skates comprising two bases for supporting a shoe and two blades for the axial support of wheels. At least two contact surfaces for mutual adhesive bonding are formed between the bases and the blades and are arranged on different planes.

Abstract: A device for regenerating a brake, particularly for skates having a supporting frame for two or more wheels and a support for a pad which has an initially intact surface which interacts with the ground during braking. A sensor for detecting the degree of wear of the surface of the pad is associated with the support and is connected to a sprocket suitable to modify the initial position of the pad. Advantageously, this modification can be achieved by restoring an intact condition for the surface that interacts with the ground. The device allows to achieve optimum braking without requiring any intervention on the part of the user for pad replacement.

Abstract: An angular adjustment device, particularly for a snowboard binding to which a disk is rigidly coupled and comprises a supporting base for a shoe. The device is constituted by first engagement elements, associated with the base, which selectively interact, through second release elements which can be operated by the user, with third coupling elements which are rigidly coupled to the disk.