with reference to fig1 the in - line skate 1 represented herein includes a boot 2 associated to a frame 3 equipped with a plurality of wheels 30 arranged in an aligned configuration . a braking system 4 can be optionally associated to the skate . the boot 2 , which is the main object of the invention , includes of a shell base 5 whose function is to bring together the essential elements of the frame of the boot that ensure the reinforcement and the retention of the foot and the ankle . as for flexibility and comfort , these arc guaranteed by a liner or inner shoe 6 placed in the shell base 5 . fig2 shows the main parts of the liner 6 according to the invention . it includes the actual liner part and a pocket portion 60 attached thereto . the liner has a sole portion 61 connected to a flexible upper portion 62 extending from the toe 63 of the foot to the heel 64 , and rising laterally and towards the rear in the direction of the lower part of the leg . the upper is formed of a flexible outer envelope , made from a fabric or flexible synthetic material , and of an inner padding 68 . the pocket portion is connected to the flexible upper along a part of its periphery 65 via an appropriate connecting means , such as a stitching 66 . a remaining part of the pocket portion is left free and thus includes an opening 67 . one of the advantages of such a construction is the fact that the flexible parts ensuring the enveloping and the comfort are assembled on the liner and are therefore dissociated from the frame part , which is made separately and then easily assembled with the liner . with reference to fig3 through 5 , the boot of the invention is formed by a simple assembly of the shell base 5 and the liner 6 after such parts have been manufactured independently . the shell base has a collar portion 7 that ensures the lateral retention of the ankle and the lower part of the leg approximately from tie region of the malleoli . preferably , the collar portion extends the heel reinforcement portion 54 of the shell base in an integral manner . the term “ integral ” as used herein denotes that the shell base and the collar portion together from one piece , and are preferably obtained by the molding of a plastic material all in one piece , i . e ., a unitary piece of material . however , in some instances , provision can be made for the shell base to be constituted of several elements made separately and attached via connecting members that do not allow the a degree of freedom of movement , such as rivets or screws , for example ; this assembly is also considered , at least in terms of its results , as being “ integral ”. the shell base 5 includes a sole portion 50 , a toe reinforcement portion 51 , and lateral portions 52 for foot retention . all of these demarcate a longitudinal opening 53 having sufficient width for the passage of the liner 6 and an inner cavity to house the liner . the shell base must be low enough in the instep area and also perhaps be punched so as to promote the flexibility provided by the liner in the front / rear direction and the entry of air for good ventilation around the foot . however , the shell base must not be too low to form a cavity with sufficient volume necessary to retain and protect a substantial part of the liner . the shell base includes section reducing means 8 connecting the heel reinforcement portion 54 to the collar portion 7 so as to allow the collar to bend in at least one direction with respect to the heel reinforcement . preferably , these section reducing means are positioned such that they promote any bending of the collar in a substantially longitudinal or front / rear direction while the collar opposes a resistance to bending for a lateral retention of the ankle . as shown , these section reducing means are , for example , notches 80 or 81 arranged in the region of the achilles tendon , on the side between the collar portion and the shell base . however , in some circumstances , the favored bending direction can be substantially inclined with respect to the longitudinal direction of the boot . the collar portion 7 is substantially u - shaped along a horizontal plane , and its opening is oriented towards the front in the direction of the toe of the shell base . this configuration promotes a good rear and lateral enveloping of the ankle . it also provides a certain elastic resistance when the leg bends towards the rear which is required to inform the skater about his reference position and balance . on the other hand , it allows greater flexibility when the leg bends towards the front so as to promote a certain freedom of movement while skating . fig5 illustrates the assembly operation of the liner in the shell base . the collar portion 7 passes through the pocket portion 60 of the liner that has the opening 67 provided to this end . the positioning is all the easier because the collar portion is integral with the rest of the shell base ; this gives it a certain retention and stiffness during the enveloping process . preferably , the pocket portion is long enough to cover and hide the section reducing means . one of the advantages is that the collar portion associated lo the section reducing means can have different geometrical configurations without altering the external appearance of the boot . the pocket portion that covers the collar portion also makes the boot look like a flexible boot . the pocket connection also solves the connection problem between the collar and the flexible part of the boot , as can be the case in prior art documents . the pocket portion also forms a partial outer covering for the frame part , without a part of such covering being sandwiched between the mobile parts of the frame . therefore , there is no risk of altering the covering part by wear and tear , as was the case in known prior art documents . a sliding contact surface is retained between the covered collar portion and the inside of the pocket , without requiring any additional connection , such as sewing , gluing or other connections . another advantage lies in the possibility of making the liner detachable with respect to the shell base . thus , the liner can be replaced , if necessary , or it can simply be provisionally separated for repair or drying . the liner can be connected to the shell base by additional connecting members , such as screws , rivets , or other equivalent elements . in a preferred embodiment , the boot is attached to the frame by the same affixing members as those used to affix the sole 61 of the liner in the shell base . the pocket portion can be made of a flexible , traction - resistant and possibly stretchable material . this can be a fabric , leather , or a sheet of synthetic material . the pocket portion is substantially u - shaped and open towards the front . it extends transversely , in a continuous manner , from one lateral side to the other and to the rear of the liner . the pocket portion is basically formed of a pliable and flexible main portion 600 , and of an edge portion 601 that is more rigid and extends at least partially along the opening 67 . the advantage of such a construction is that it helps keep the pocket portion pressed against the collar portion and prevents the edges of the pocket portion from turning over . is also helps the assembly because it conserves the opening 67 and helps the sliding of the collar portion inside of the pocket portion . in the embodiment described , the pocket portion 60 extends from the top of the collar portion or upper part 70 to a zone 71 located above the sole 50 of the shell base in the heel reinforcement region . for reasons of durability , it is preferable to leave the reinforcement portion without any covering of the flexible part because its surface is more resistant to the abrasions , frictions , and impacts than the pocket portion which is made of a more flexible material and is therefore more sensitive to such assaults . the pocket portion has attachment elements 69 on the shell base . preferably , an adequate number of such elements are distributed along the rigid edge 601 . for example , these can be two in number , each located on one side of the shell base . preferably , they are selected from among detachable elements so as to promote the detachability of die flexible part , the liner with respect to the rigid part , the shell base . these elements could be , for example , clips , screws , staples , buckles , and / or hook and loop fasteners , such as velcro ™. it is not necessary to provide a connecting element along the entire periphery of the edge 601 , since the connection produced by the pocket is adequate in itself . the role of the connecting element is more of reducing the risk of the edge of the pocket portion from turning over and of keeping the edge pressed against the shell base . the shell base can have an edge portion 710 forming an abutment for the correct positioning of the pocket portion 60 and for promoting die continuity of the surfaces between the flexible parts and the rigid parts of tie boot for reasons of appearance , finishing quality , and durability . the lateral parts 52 of the shell base are extended , advantageously , via substantially rigid flaps 55 that border at least a portion of the longitudinal opening 53 . the flaps are equipped with tightening elements 85 that work to contract the opening and limit the volume of the cavity around the liner . the relatively rigid flaps also help to retain the front of the liner , near the instep , in the shell base cavity . their length and width can be variable depending on the requirements . preferably , they are integral with the rest of the shell base and , preferably , molded all in one piece , i . e ., unitarily , therewith . fig6 shows a constructional detail of the boot according to the invention . in particular , a flexible and pliable protective strip 56 forms , at least partially , the edges of the opening 53 and is attached along at least a portion of the shell base 5 . the strip 56 is relatively more flexible an the flaps 55 . preferably , the protective strip 56 can be used to line the inside of the flaps 55 . the protective strip 56 is extended longitudinally beyond the flaps and also bears the tightening elements 86 . 87 . its function is therefore to protect the liner from the direct supports of the rigid parts of the shell base , in particular the flaps 55 , during tightening . its role also includes providing comfort by avoiding hard spots on the liner . the strip 56 can be connected to the shell base via any appropriate connecting means , such as sewing , gluing , riveting , or any combination of such means . preferably , a flange 57 of the shell base is provided which borders the protective strip . the flange is thick enough in order for such flange to be flush with or slightly exceed the protective strip . the flange is used to protect the strip from abrasion . preferably , the protective strip is obtained from a traction resistant flexible material , such as a fabric , a flexible plastic sheet , leather , etc . the liner can also be equipped with tightening elements 88 in its top upper portion which act by tightening the upper part of the liner . this has the advantage of leaving the front of the top of the upper in a flexible and breathable material for better bending flexibility and good ventilation . all the tightening elements 85 , 86 , 87 , and 88 are used to fully tighten the boot about the foot and the lower part of the leg . the tightening of the instep is mainly done via the tightening elements borne by the shell base , whereas the tightening of the lower part of the leg , above the ankle , is done via the elements borne by the liner . such tightening elements can be return keepers , such as those represented , notched or self - gripping straps , hooks , buckles , etc . a tightening strap could also be added around the collar to ensure a better tightening of the ankle ( not represented ). fig7 illustrates a possible variation of the boot 2 of the invention , in which the proportion of the shell base 5 is reduced with respect to the proportion of the flexible liner 6 . the shell base has a sole 50 from which a heel reinforcement 54 extends . this assembly includes a cavity , open towards the front and acting as a receiving cradle for a flexible liner part . a collar 7 , shown in broken lines , extends the heel reinforcement , preferably all in one piece , as was the case previously . the collar is covered by a pocket portion 60 of the liner it is advantageous for the heel reinforcement to not be covered by the pocket portion of the liner so as to retain greater flexibility and better resistance to abrasion in the lower part of the boot . the pocket portion is attached on each side of the shell base via a respective attachment element 69 that keeps the outer flexible lining pressed against the collar . the shell base also has a toe reinforcement 51 that is affixed to the liner before assembly and that therefore constitutes an element separate from the rest of the shell base before assembly . the liner has a flexible upper portion 62 made of a pliable , breathable and relatively resistant material , having a substantial part , preferably front and lateral , is left free so as to promote the lightness and breathability of the boot . the liner is tightened on the foot via tightening elements 89 that are assembled on the side of the liner . a tightening buckle 91 for the lower part of the leg can be mounted usefully on the collar to ensure its closure . the assembly of the liner on the shell base is done via an inner sole , called the “ insole ” 90 ( represented in broken lines ). assembling the liner 6 on the insole 90 via assembly elements by forming a sub - assembly ; assembling such liner / sole sub - assembly on the shell base 5 via other assembly elements . the assembly elements can be selected from the group consisting of screws , glue , rivets , staples , and nails , for example . even though this may not be the best embodiment of the invention , one is obliged to envision , if necessary , a journal between the collar portion and the heel reinforcement portion . in such a case , the pocket portion will cover the journal from the outside so as to prevent any wear and tear problems and so as to hide this element , basically for a better retention of the liner with the shell base and also for reasons of appearance . the invention can be envisioned for some applications in other types of sport boots having rising uppers , for example , for hiking boots , snowboarding boots , or ski boots when a type of light , economical and relatively flexible boot construction is desired along while ensuring retention for the foot and the lower part of the leg . the invention is not restricted to the embodiment described hereinabove , but it encompasses numerous potential variations falling within the scope of the following claims . the instant application is based upon the french priority patent application no . 98 04343 , filed on apr . 3 , 1998 , the disclosure of which is hereby expressly incorporated by reference thereto in its entirety , and the priority of which is hereby claimed under 35 usc 119 .
a boot adapted to the practice of skating and a method of manufacturing such boot , the boot including a shell base equipped with a rigid sole adapted to be attached on the frame of a skate and a heel reinforcement part , and a flexible liner that is positioned inside the shell base including of a padded upper part surrounding the foot and at least one outer pocket portion . the shell base according to the invention has a rigid collar portion that extends the heel reinforcement and the pocket portion at least partially covers the collar portion so as to ensure at least partially the retention of the flexible liner in the shell base . the invention relates to a boot structure encompassing the essential functions of foot retention and controlled flexibility , and whose assembly is made easier .