making reference to the drawing views and in particular to fig1 to 4 , this ski boot incorporating a flex adjusting device comprises a cross band element , generally designated with the reference numeral 1 , which is associated with the bottom face of the front quarter at forward portion of the quarter overlapping the instep covering portion 3 of the boot shell with an overlapping surface portion thereof . the band 1 extends crosswise to the user &# 39 ; s foot main direction , essentially at the foot instep . the cross band 1 is supported at its end on the quarter , being secured thererto by screw fastener means 5 engaging in end eyes 6 provided at the band end and being connected to threaded seats 7 defined on the quarter . provided on the face of the band 1 facing toward the overlapping surface portion of the front quarter are ribs 8 which engage in corresponding seats 9 provided in said overlapping portion to join together the cross band 1 and front quarter 2 . with its bottom face , i . e . the remote one from that having the ribs 8 , the band 1 acts by contact against the instep covering portion 3 of the boot shell . by operating the screws 5 , the cross band 1 , which is supported on the front quarter 2 , is practically pressed to a greater or lesser extent against the shell 3 so as to change the characteristics of the contact area to make rotation of the quarter 2 relatively to the shell 3 more or less easily performed , thereby adjusting the amount of flex . it may be appreciated that by applying a pull to the cross band 1 , i . e . by tightening the screws 6 , the cross band 1 is pressed with increased force against the shell 3 , thereby increasing the frictional coefficient which resists the mutual rotation of the quarter 2 and shell 3 . by loosening the screws , the pull force on the cross band 1 is , of course , decreased , and accordingly , the oscillatation of the quarter with respect to the shell favored . as shown in fig5 and 6 , an oscillating band 11 is provided overriding the instep portion 3 of the boot shell and which is hingedly connected with its ends to the side portion of the front quarter , again indicated at 2 . the oscillating band 11 is provided , at its upper portion , with a pair of ears 12 which engage with a threaded bar 13 journalled at its ends on the lower portion , i . e . the portion concealed from view of the front quarter 2 . a ring nut 14 , which can be reached through a small window 15 through the outside of the quarter 2 , engages with the threaded bar 13 at the area included between the ears 12 , thereby manipulating the ring nut 14 , the bar 13 can be rotated to produce a translation of the ears 12 relatively to the bar 13 , which is converted into an oscillatory or pivotal movement of the oscillating band 11 about its hinge connection points on the front quarter 2 . the oscillation of the oscillating band 11 brings about either an increase or decrease of the contact areas between the oscillating band 11 and shell , and consequently a change in the frictional force developed between the band and shell , thereby the effort required to effect the swinging movement between the quarter and shell . shown in fig7 to 9 is a device which comprises a pair of side bands 20 associated at the bottom face , i . e . the face of the front 2 which is concealed from view and again indicated at 2 , which side bands 20 have one of their ends , indicated at 21 , hingedly connected to the front quarter 2 , at side regions thereof . each band 20 has , at its other end , a means adapted to generate the rotation of the band 20 with respect to the end 21 . in a preferred embodiment , such means includes a plate or strip 22 with parallel slots , which engages with a worm screw 23 carried rotatably on the quarter , thereby the rotation of the worm screw 23 results in a translation of the slotted strip and consequent oscillation of each side band relatively to the front quarter , with attendant variation of the contact area between said side band 20 and the shell 3 . as shown in fig9 the band 20 is positioned in a recess 30 defined by the bottom face of the front quarter 2 , and has on the front a stopper projection indicated at 31 . also in this case , by causing the side bands to swing on their ends journalled to the front quarter , the contact area between the side bands and shell can be varied , and hence , the friction conditions can be changed which affect the flexing of the front quarter relatively to the shell . it may be appreciated from the foregoing that the invention achieves its objects , and in particular the fact should be enhanced that a device is provided which allows the contact conditions between one part rigid with the front quarter and the boot shell to be varied , thereby increasing or decreasing the mutual frictional coefficient and varying , as a result , the boot amount of flex . in practicing the invention , the materials used , while best results are to be obtained through the use of plastic materials , as well as the dimensions and contingent shapes , may be any selected ones to meet individual requirements .
a rear entrance ski boot incorporating a flex adjusting device , which comprises at least one band element connected to the front quarter of the ski boot and acting by contact on the boot shell . also provided are means of changing the position of the band element relatively to the front quarter to vary the contact condition between the boot shell and band element itself .