Snowboard binding system with automatic forward lean support

Abstract

A step-in binding system ( 20 ) for securing a boot ( 24 ) to a snowboard ( 22 ). The boot includes a sole defining a toe end, a heel end, and a binding attachment surfaces ( 46 and 50 ). The boot also has an elongate, substantially U-shaped highback ( 28 ) mounted to the exterior of the boot in the calf area thereof and extending from the ankle area to the top of the boot. The step-in binding system includes a toe and heel binding ( 62 and 64 ) attached to the snowboard for receiving and securing the boot to the snowboard. The step-in binding system also includes a lever arm ( 66 ) attached to the heel binding for selectively releasing the boot from the binding. A lean support member ( 68 ) is fastened near the rearward end of the binding for engagement with a stopper block ( 29 ) secured to the highback to define a minimum forward lean angle of the boot and to limit the aft flexure of the ankle support portion of the boot when the boot is received within the binding.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:  
     
         1 . A step-in binding for securing a boot to a bearing member capable of traversing a surface, the boot having a sole defining a toe end, a heel end, and a binding attachment surface, an ankle support portion capable of flexing relative to the plane of the sole, and an elongate ankle support member mounted to the exterior of the boot in the calf area thereof, the step-in binding comprising: 
 (a) at least a first binding member attached to the bearing member for receiving and coupling to the binding attachment surface of the boot, the first binding member having a forward end and a rearward end; and    (b) a lean support member fastened near the rearward end of the first binding member for engagement with the ankle support member to define a minimum forward lean angle of the ankle support portion of the boot and to limit the aft flexure of the ankle support portion of the boot when the boot is received within the first binding member.    
     
     
         2 . The step-in binding of  claim 1 , further comprising a release member attached to the first binding member for selectively releasing the boot from the first binding member.  
     
     
         3 . The step-in binding of  claim 1 , wherein the ankle support member is a highback mounted to the exterior of the boot in the calf area thereof and extends from below to above the ankle area of the boot.  
     
     
         4 . The step-in binding of  claim 3 , wherein the bearing member is a snowboard.  
     
     
         5 . The step-in binding of  claim 4 , wherein the lean support member is slidably adjustable between the forward and rearward ends of the first attachment surface, such that the lean support member may be adjusted therein to optimize the fit between the lean support member and the heel end of the boot.  
     
     
         6 . The step-in binding of  claim 5  further comprising an elongate plate securable to the snowboard, the plate having a forward end and a rearward end, the first binding member is attached to the plate, the plate has upwardly projecting first and second flanges formed on opposing sides of the plate substantially near the rearward end thereof.  
     
     
         7 . The step-in binding of  claim 6 , wherein the lean support member is a U-shaped heel loop having an upper side and a lower side, and the ends of the heel loop are fastened to the upwardly projecting first and second flanges.  
     
     
         8 . The step-in binding of  claim 7 , further comprising a Y-shaped stopper block, the stopper block having a forward facing surface and a rearward facing surface, the stopper block fastened to the arcuate portion of the first lean support member between the ends thereof, such that a lower end of the highback is receivable within the forked portion of the stopper block when the boot is secured to the first binding member to defined the forward lean angle and substantially reduce the aft flexure of the ankle support portion of the boot.  
     
     
         9 . The step-in binding of  claim 8 , wherein the stopper block comprises an adjustment member extending outwardly from the rearward facing surface to slidably adjust the stopper block along the longitudinal axis thereof, such that the degree of forward lean may be selectively optimized by the adjustment member.  
     
     
         10 . The step-in binding of  claim 7 , further comprising a Y-shaped stopper block, the stopper block having a forward facing surface and a rearward facing surface, the stopper block depending downwardly from the highback and positioned for engagement with the lean support member, such that the lean support member is receivable within the forked portion of the stopper block when the boot is coupled to the snowboard to define the forward lean angle and substantially reduce the aft flexure of the ankle support portion of the boot.  
     
     
         11 . The step-in binding of  claim 10 , wherein the stopper block comprises an adjustment member extending outwardly from the rearward facing surface to slidably adjust the stopper block along the longitudinal axis thereof, such that the degree of forward lean may be selectively optimized by the adjustment member.  
     
     
         12 . The step-in binding of  claim 6 , wherein the lean support member further comprises elongate first and second support arms, the first and second support arms having a forward end and a rearward end, and the first and second support arms are fastened to the first and second flanges, respectively, such that they are substantially parallel to each other.  
     
     
         13 . The step-in binding of  claim 12 , wherein the first and second support arms further comprise first and second stopper blocks projecting upwardly from each support arm substantially near the rearward end thereof and positioned for engagement with the sides of the highback to define the forward lean angle and substantially reduce the aft flexure of the ankle support portion of the boot when the boot is coupled to the snowboard.  
     
     
         14 . The step-in binding of  claim 1 , further comprising a bearing surface defined on one of a lower end of the highback or the lean support member, and disposed to bear against the other of the highback or the lean support member when the boot is coupled to the first binding member, thereby preventing aft flexure beyond the minimum forward lean angle.  
     
     
         15 . The step-in binding of  claim 14 , wherein the bearing surface is defined by a stopper block secured to a lower end of the highback.  
     
     
         16 . The step-in binding of  claim 14 , wherein the bearing surface is defined by a stopper block secured to the lean support member.  
     
     
         17 . The step-in binding of  claim 14 , wherein the bearing surface is defined by a stopper member adjustably secured to one of the highback or the lean support member to enable adjustment of the minimum forward lean angle.  
     
     
         18 . The step-in binding of  claim 7 , further comprising an L-shaped attachment arm having an upper end and a lower end, the attachment arm is hingedly attached to the highback such that the lower end of the attachment arm may lockingly engage a notch centrally located on the lower side of the heel loop when the boot is secured to the first binding member to secure the heel end of the boot to the snowboard.  
     
     
         19 . The step-in binding of  claim 7 , further comprising a substantially U-shaped buckle depending downwardly from the highback.  
     
     
         20 . The step-binding of  claim 19 , further comprising a rectangularly shaped receiver centrally located on the arcuate portion of the heel loop and sized to slidably received the arms of the buckle therein when the boot is secured to the first binding member to define the forward lean angle and substantially reduce the aft flexure of the ankle support portion of the boat.