Abstract: A shell having on its external surface, also called sole, a circular opening comprising a rim with teeth for receiving said device for fixing the shell to the surf board. Said device consists of a first circular part (1) fixed on the surf board defining at its lower portion housings (15) with the surf board surface and retaining at its periphery a second circular part (2) fixed in rotation with said first part leaving it free to move in the direction perpendicular to the surf board over a predetermined distance. The second part has at its lower surface teeth (21) corresponding to said shell teeth. The device further comprises a third circular part (3) arranged beneath the first part in said housings, that is between the surf board and said first part, maintained fixed by the latter in the perpendicular direction but in free rotation over a predetermined angle.

Abstract: Interface element used in snowboarding and intended to transmit the pressure exerted by the foot of the rider in the direction of the snowboard (1), said element having median longitudinal (5) and transverse (6) planes dividing the pressure zone (3, 4) into four quadrants (11-14), wherein two (11, 13) of the quadrants arranged diagonally have a rigidity greater than the two other quadrants (12, 14) so as to favor transmission of the pressure at the diagonal of the two quadrants of greater rigidity, said diagonal being intended to be oriented substantially perpendicularly to the longitudinal axis of the board.

Abstract: A ski boot consisting of a flexible upper (1) in the form of a shoe fixed to a rigid intermediate sole (4) on which smooth bearing surfaces (6a, 7a) are formed, the intermediate sole being covered by a walking sole (11) leaving free the bearing surfaces which are preferably set back from the walking surface. These bearing surfaces are intended to bear on and slide over the corresponding surfaces of a safety binding.

Abstract: A boot for a gliding sport, consisting of a bootie with a soft upper (1) and of an intermediate rigid sole (4) itself at least partially covered by a flexible walking sole (9), and provided with a transverse metal bar (6) for connection to a binding. The boot further has bearing surfaces on either side of the bar. At least in the foot sole region, the bearing surface is a projection (7) of the intermediate rigid sole.

Abstract: Interface element used in snowboarding and intended to transmit the pressure exerted by the foot of the rider in the direction of the snowboard (1), said element having median longitudinal (5) and transverse (6) planes dividing the pressure zone (3, 4) into four quadrants (11-14), wherein two (11, 13) of the quadrants arranged diagonally have a rigidity greater than the two other quadrants (12, 14) so as to favor transmission of the pressure at the diagonal of the two quadrants of greater rigidity, said diagonal being intended to be oriented substantially perpendicularly to the longitudinal axis of the board.

Abstract: A boot/binding system for a snowboard wherein the boot includes a sole and transverse bar having two ends. A binding includes a base defining a horizontal plane and a median plane. The binding is selectively fixed to the board in a plurality of positions and is pivotal about an axis which is perpendicular to the horizontal plane and intersects the horizontal plane at point O. The binding includes two vertical plates arranged substantially parallel to the median plane, each of the vertical plates including a vertical groove into which one end of the transverse bar of the boot is insertable. The ends of said bar are held inside each groove by a pivoting cam elastically held in position. A first region of contact of the bar end is in contact with a front wall of the groove and the first region of contact is contained in a normal plane formed by the front wall of the groove.