Safety fixing devices for skis

Claim 1

In a safety binding device for skis, a system for automatically positioning the boot of a skier with respect to the axis of the ski when the skier puts on his ski; the sole of the boot of the skier bearing a first ramp symmetrically shaped with respect to the longitudinal axis of the boot; said system being composed of a bridge-member mounted on the ski, said bridge member including: a movable portion; a second ramp fixed on said movable portion, said ramp being symmetrically shaped with respect to the longitudinal axis of the ski and adapted to cooperate with said first ramp for locking the boot with respect to the movable portion: the angle between the tangent to the profile of the second ramp and the axis of the first ramp of said ski boot exceeding 90 degrees and the profile of the first ramp being at a distance from the center of pivoting of the ski boot less than the distance from said center of pivoting to the point of the first ramp located in the longitudinal axis of symmetry; said portion being movable between two positions: a first position for which said portion is raised with respect to the ski, a second low position for which said portion is folded onto the ski and locked with respect thereto and for which said first and second ramps cooperate to lock the boot with respect to said movable portion; said movable portion being actuated from said first position to said second position by the skier with the sole of his boot when he puts on the ski.