Safety fixing device for skis

A safety fixing device for skis permitting automatic re-centering of the boot on the longitudinal axis of the ski when the skier fixes said device on the feet while standing up, said device including a member for retaining one of the extremities of said boot, comprising:

• a first ramp mounted on said boot,
• a catch member mounted on said ski comprising a mobile portion on which is located a second ramp;
• said mobile portion moving between two positions,
• a first position in which the mobile portion of said catch member is raised with respect to said ski,
• a second position in which the mobile portion of said catch member is locked with respect to the ski;
• the transition from said first to said second position being effected by the action of the boot against the action of an elastic member located in said fixing device at least at one end of the extremities of the boot, the profile of said two ramps in a plane parallel to the ski and to the sole of said boot having substantially the form of a concave curve and a convex curve opening out towards the same extremity of said ski;
• said ramp mounted on said boot comprising at least one projecting portion and two sliding surfaces, one said surface being substantially parallel to said boot and directed downwards, the other being inclined with respect to said boot and directed upwards;
• the ramp located on the mobile portion of said catch member comprising at least one projecting portion,
• the ramp associated with the boot and the ramp of the mobile portion of said catch member cooperating in such manner that when said mobile portion rotates:
• the projecting portion of the ramp of said mobile portion slides over the sliding surface directed downwards;
• the projecting portion of the ramp associated with said boot slides over the ramp located on the mobile portion of said catch member.