Safety device for ski-securing means

Claim 1

A SAFETY SYSTEM FOR SKI SECURING MEANS COMPRISING A FIRST MEMBER RIGID WITH THE SKI, A SECOND MEMBER ENGAGING THE SKIER''S SHOE AND ADAPTED TO MOVE OVER THE FIRST MEMBER BETWEEN AN OPERATIVE POSITION CLAMPING SAID SHOE IN POSITION AND A POSITION RELEASING THE SHOE UNDER THE ACTION OF EXTERNAL STRESSES ABOVE A PREDETERMINED VALVE, ONE OF SAID MEMBERS BEING PROVIDED WITH AN ELONGATED HORIZONTAL TRANSVERSE SLOT, A VERTICAL CYLINDRICAL PIVOT RIGID WITH THE OTHER MEMBER, ENGAGING SAID SLOT AND ADAPTED TO HORIZONTALLY AND VERTICALLY SLIDE THEREIN, THE DIAMETER OF SAID PIVOT BEING SUBSTANTIALLY EQUAL TO THAT OF THE SLOT, AT LEAST ONE OF SAID MEMBERS BEING MADE OF A SELF-LUBRICATING PLASTIC MATERIAL IN AT LEAST PART OF ITS SURFACE ENGAGINT THE OTHER MEMBER, ONE OF SAID MEMBERS BEING PROVIDED WITH AT LEAST ONE RECESS IN ITS SURFACE ENGAGINT THE OTHER MEMBER, A PROJECTION RAISED ON SAID OTHER MEMBER AND NORMALLY ENGAGING THE CORRESPONDING RECESS IN SAID ONE SURFACE AND ELASTIC MEANS FITTED BETWEEN SAID MEMBERS URGING THEM TOWARDS EACH OTHER TO HOLD SAID PROJECTION ON THE OTHER SURFACE INSIDE THE CORRESPONDING RECESS TO LOCK ELASTICALLY THE TWO MEMBERS AGANIST A RELATIVE VERTICAL, ANGULAR AND TRANSVERSE SHOE-RELEASING SHIFTING AS LONG AT THE EXTERNAL STRESSES DO NOT RISE ABOVE SAID PREDETERMINED VALUE.