Abstract: An air supply device of a wheel-mounted shoe which can supply ambient air into the interior of the shoe by continuously suck the ambient air in by use of the rotating force of the frictional roller interposed between adjacent ones of the wheels rotatably mounted to the bracket of the outer sole of the shoe, irrespective of the rotating direction of the wheels. Accordingly, the air supply device eliminates uncomfortableness caused by sweat and odor generated from the user in the interior of the shoe, to maintain the interior of the shoe in a pleasant state, thereby helping the user's foot health.

Abstract: An in-line roller skate including a chassis of which one longitudinal lower portion carries the wheels, on the one hand, and a boot formed by a shell overlying a sole adapted to be fixed on an upper plate of the chassis, on the other hand, the volume of the upper being in communication with the outside so as to obtain the internal ventilation thereof by an air supply, wherein it includes air passages interposed between an external collecting zone and the internal volume of the shell, these air passages being constituted by a ventilation chamber provided beneath an internal plantar support of the boot and communicating with the internal volume of the shell.

Abstract: In-line roller skate including a chassis of which one longitudinal lower portion carries the wheels, on the one hand, and a boot formed by a shell overlaying a sole adapted to be fixed on an upper plate of the chassis, on the other hand, the volume of the upper being in communication with the outside so as to obtain the internal ventilation thereof by air supply, wherein it includes air passages interposed between an external collecting zone and the internal volume of the shell, these air passages being constituted by a ventilation chamber provided beneath an internal plantar support of the boot and communicating with the internal volume of the shell.