Safety binding for a boot on a ski

Abstract

An assembly for binding a boot to a ski including a front retaining element that is releasable when the forces to which the front retaining element is subjected are greater than the pretensioning value of a first spring, a rear retaining element that is releasable when the forces to which the rear retaining element is subjected are greater than the pretensioning value of a first spring, and an additional release device that is electronically controllable and includes a mechanically controllable locking mechanism.

1 . An assembly for binding a boot to a ski comprising:
 a front retaining element comprising a first spring adapted to be set at a pretensioning value, said front retaining element comprising a first release device releasable in response to an applied force greater than said pretensioning value of said first spring;   a rear retaining element comprising a second spring adapted to be set at a pretensioning value, said rear retaining element comprising a second release device releasable in response to an applied force greater than said pretensioning value of said second spring; and   an additional release device, said additional release device being electronically controllable;   said additional release device comprising a mechanically controllable locking mechanism.   
     
     
         2 . An assembly for binding a boot to a ski according to  claim 1 , further comprising:
 a slideway, at least one of said front and rear retaining elements being mounted to slide in said slideway;   said additional release device comprising a bar fastened to said one of said front and rear retaining elements, said bar being longitudinally movable between an open position and a closed position in reaction to actuation of said additional release device.   
     
     
         3 . An assembly for binding a boot to a ski according to  claim 2 , wherein:
 said mechanically controllable locking mechanism comprises a drawrail movable between a non-blocking position and a blocking position;   said drawrail not blocking translational movement of said bar in said non-blocking position;   said drawrail preventing said bar from moving in translation in said blocking position.   
     
     
         4 . An assembly for binding a boot to a ski according to  claim 3 , wherein:
 said bar comprises a projection abutting against said drawrail when said drawrail is in said blocking position.   
     
     
         5 . An assembly for binding a boot to a ski according to  claim 3 , wherein:
 said locking mechanism comprises an electric switch, said switch being adapted to switch off said additional release device.   
     
     
         6 . An assembly for binding a boot to a ski according to  claim 4 , wherein:
 said additional release device comprises a tripper; and   said bar comprises a pin adapted to be retained in the tripper.   
     
     
         7 . An assembly for binding a boot to a ski according to  claim 6 , wherein:
 said additional release device comprises a mechanism to automatically reset the tripper.   
     
     
         8 . An assembly for binding a boot to a ski according to  claim 7 , wherein:
 said mechanism to automatically reset the tripper comprises a contactor actuated by said bar when said bar is in the closed position.   
     
     
         9 . An assembly for binding a boot to a ski according to  claim 3 , wherein:
 said drawrail comprises a handle, said handle adapted to be actuated from outside the actuation box.   
     
     
         10 . An assembly for binding a boot to a ski according to  claim 1 , wherein:
 said mechanically controllable locking mechanism of said additional release device is mechanically connected to a part connected for movement with one of said front and rear retaining elements.   
     
     
         11 . An assembly for binding a boot to a ski according to  claim 1 , wherein:
 said mechanically controllable locking mechanism of said additional release device is mechanically connected to a part connected for movement with one of said front and rear retaining elements in a non-released position.   
     
     
         12 . An assembly for binding a boot to a ski according to  claim 1 , wherein:
 said additional release device further comprising:
 a front sensor positioned for detecting a force applied to said front retaining element greater than said pretensioning value of said first spring; 
 a rear sensor positioned for detecting a force applied to said rear retaining element greater than said pretensioning value of said second spring; 
 a control box for generating a command for enabling movement of one of said front and rear retaining elements to release the boot from the binding assembly in response to reception of a signal generated by at least one of said front and rear sensors. 
   
     
     
         13 . An assembly for binding a boot to a ski according to  claim 12 , wherein:
 said mechanically controllable locking mechanism of said additional release device is mechanically connected to a part connected for movement with one of said front and rear retaining elements.   
     
     
         14 . An assembly for binding a boot to a ski according to  claim 12 , wherein:
 said mechanically controllable locking mechanism comprises an actuation box containing a tripper movable between a free position and a blocking position;   in response to said reception of a signal generated by at least one of said front and rear sensors, said control box generates a command for moving said tripper from said blocking position to said free position, for enabling said movement of one of said front and rear retaining elements to release the boot from the binding assembly.