Abstract:
An assembly of a shoe and retention device for use on a gliding board. The retention device of the assembly includes an attachment mechanism for attaching in a vertical direction and along a horizontal plane, which cooperates with a complementary attachment mechanism of the shoe, arranged in a central portion of the sole of the shoe. The shoe includes a skeleton that is constituted by a minimal force-transmission circuit which provides for the support necessary for practicing the gliding sport and the force-transmission circuit passes through the attachment mechanism of the shoe. The integration of the shoe having a minimal force-transmission circuit and its direct linkage with the attachment mechanism of the shoe make it possible to ensure a good transmission of forces and support for a minimum space requirement of the retention device.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation-in-part of Application Ser. No. 08/224,142, filed on Apr. 4, 1994, now U.S. Pat. No. 5,595,396, Jan. 21, 1997. 
    
    
     The present application is related to a shoe/shoe retention device assembly on a gliding element, notably on a snowboard. 
     DESCRIPTION OF BACKGROUND AND RELEVANT INFORMATION 
     Snowboarding is a gliding sport in which both feet of the rider are on a single board and positioned obliquely with respect to the longitudinal axis of the board. 
     There are two origins for shoe/retention device assemblies corresponding to different dominant practices. 
     For a practice of the alpine type preferably carried out on a trail or packed snow, the shoes are of the alpine or cross-country ski type, rigid, in such a manner to allow for very sustained and precise support transmissions and edge settings. The retention elements cooperating with such shoes are generally stirrups locking each of the front and rear ends of each shoe sole. The rigidity of such shoe is generally obtained by a shell and a collar journalled made of plastic thus constituting a closed power circuit. This construction has the following disadvantages: 
     hinderance during the transition phases when the rider has only one shod foot on the board and pushes against in the snow with the second foot in order to move, notably on flat or in tendon lines for ski lifts, 
     hinderance during the movements that are necessary in the practice of snowboarding, particularly when the knee must move inwardly by a lateral flexion of the ankle, either to bend further, or to land from a jump, or to carry out figures during an airborne phase, 
     filtration of the sensations coming from the board through the rigid sole, thus reducing much of the information circuit, 
     hinderance during walking. 
     For a practice of the &#34;Soft&#34; type preferably carried out on soft, non-packed, powdery snow, favoring jumps, sides-lipping, and other figures, the shoes are very flexible and the necessary supports are essentially provided by retention elements in the form of an open shell and a journalled collar that are rigid, associated with straps, two or three per foot, allowing for the transmission of vertical forces from the bottom upward and forward. 
     Furthermore, the maintaining of the ankle and the instep is obtained by a diagonal strap substantially positioned at the level of the flexion fold and associated with a semi-rigid padded plate that distributes the pressure on the instep and ensures a progressiveness of the flexion of the heel, toward the front in particular. 
     These flexible shoes are essentially designed as sealed and comfortable shoes and having no role in the transmission of forces. 
     Therefore, they have the advantage of being comfortable and allowing a normal walk. 
     On the contrary, the retention elements with a shell are cumbersome and require a precise adjustment to the volume of the shoe during each operation for &#34;putting on&#34; the snowboard. 
     From the patent application FR No. 93.06006, now French Patent No. 2,705,268, published Nov. 25, 1994, there has been proposed a device for retaining a snowboard shoe on a board by complementarity of the forms between the lower surface of the sole and the retention device, and the device for vertical latching. 
     Such a retention device has a particularly simple construction and is independent of the size of the shoe. 
     On the contrary, it requires a rigid sole and is therefore not compatible with shoes of the boot type with a flexible sole. 
     Such a retention device does not allow either the taking of support, transmissions of forces provided by the retention devices with a shell. 
     SUMMARY OF THE INVENTION 
     The object of the present invention is to resolve the herein above disadvantages and to provide a shoe/shoe retention device assembly on a gliding element such as a snowboard that has the advantages of the two systems of retention assemblies hereinabove described, without having the disadvantages thereof. 
     The assembly should notably provide a good compromise for the foot retention/comfort and transmission of the forces, support. It must likewise allow an easy insertion of the shoe and have a minimum space requirement. 
     Lastly, the shoe must be sufficiently flexible to allow walking with a certain movement of the foot. 
     This object is achieved in the shoe/retention device assembly according to the invention due the fact: 
     that the retention device comprises means for attachment in the vertical direction and along a horizontal plane cooperating with complementary shoe attachment means arranged in a central portion of the sole of the shoe, 
     that the shoe comprises a skeleton constituting a minimal energy circuit for the transmission of forces and support necessary in the practice of the sport, and 
     that this energy circuit passes through the attachment means of the sole of the shoe. 
     In this manner, the front and rear ends of the sole of the shoe can be left flexible and can thus gain the tactile and movement sensations necessary for walking. 
     Furthermore, the integration in the shoe of the minimal energy circuit, which corresponds to the power circuit constituted by the shell of a shell/boot assembly, and its direct linkage with the attachment means-of the shoe allows to guarantee good transmission of forces and taking of support for a minimum space requirement of the retention device. 
     According to an advantageous embodiment of the retention device, the means for vertical attachment are of the latch type, and the means for attachment along a horizontal plane are constituted by forms that are complementary to the shoe and retention devices, ensuring a linkage along a longitudinal and transverse direction of this plane, for example, by an assembly of grooves/ribs of appropriate forms. 
    
    
     BRIEF DESCRIPTION OF THE INVENTION 
     In any case, the invention will be better understood, and other characteristics thereof will become evident with the help of the description that follows, with reference to the annexed schematic drawing and in which: 
     FIG. 1 is a perspective view of a shoe/retention device assembly according to one embodiment, 
     FIG. 2 is a side view of an example of the shoe skeleton. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The shoe/retention device assembly shown in FIG. 1 comprises a retention device 10 adapted to be mounted on a gliding board or snowboard, and a shoe 20 comprising attachment means 30 complementary to those of the retention device. 
     The retention device 10 comprises projection in the form of two rounded ribs 11, 12 with a substantially trapezoidal shape and arranged opposite and forming, seen from the top, a sort of X. 
     Each of these ribs, 11, 12, can be interrupted by one or several slits 13, such as shown in the drawing, so as not to overly influence the bending capability of the board on which the retention device is mounted and to allow the evacuation of snow at the moment the shoe is put on. 
     The shoe complementary attachments means are constituted by two symmetrical recesses or grooves 31 arranged on both sides of the longitudinal axis of the shoe and having shapes complementary to the ribs 11, 12. 
     These ribs 11, 12 and grooves 31 allow a form linkage between the shoe and the retention device in the horizontal plane of the snowboard, whereby the projecting form constituted by the ribs 11, 12 fits within said recessed form constituted by the recesses 31, 31. 
     Of course, other forms of ribs/grooves can be envisioned to the extent that they likewise allow for such a form linkage to be obtained along two perpendicular directions of the horizontal plane. 
     A locking plate, latch, or sash bolt 14 that can be operated by means of a handle 15 is slidably mounted in a slot 16 of the rib 11, and is capable of nesting in a recess 17 of the other rib 12. 
     This sash bolt 14 is adapted to cooperate with a latching member or pin 32 of the shoe, for the vertical latching of the shoe. 
     To this end, the space provided in the sash bolt 14 and the base 18 of the retention device just corresponds to the diameter of the attachment or latching member 32. 
     By simple means, one thus obtains a latching of the shoe on the gliding element along the three degrees of freedom. 
     Of course, the sash bolt/latching axle system can be reversed, the sash bolt being on the shoe and the latching member being on the retention device. 
     Likewise, the latching member 32 could be replaced by a flat iron piece or any other means for vertical retention could be provided without leaving the scope of the present invention. 
     In summary of the exemplary boot/retention device illustrated in FIG. 1, the retention device includes an attachment in the form of ribs 11, 12 and latch 14, whereas the boot has a complementary attachment in the form of recesses 31, 31 and latching member 32. 
     FIG. 2 illustrates an embodiment of the shoe skeleton 40 adapted to allow a transmission of the forces and supports necessary to the practice of the sport. 
     For reasons related to lightness, but also to comfort, this skeleton 40 is minimal but provides an energy or force transmission circuit corresponding to that provided by the shell of a retention device for a snowboard shoe of the boot type. 
     It is constituted by a rigid shell 41 surrounding the lower portion of the foot (represented in phantom lines as reference numeral 1) from the zone 42 to the level of the Achilles tendon zone 43. 
     The shell 41 however does not extend past the metatarsus so as to allow the tactile sensations at the level of the forefoot/toes. 
     Likewise, the shell 41 bears a wide scallop 44 at the level of the heel so as to allow the positioning of shock absorbing means at this level, and to allow tactile sensations of the heel, notably at the moment the step is begun, during walking or landing from a jump, so as to allow the sensation of the portion of the board that first touches the ground. 
     Furthermore, the shell 41 defines the recesses grooves 31 and creates the anchoring of the pin latching member 32. The shell 41 therefore completely integrates the anchoring means of the shoe that are thus directly connected to the power circuit. 
     As shown by the comparison of FIGS. 1 and 2, the shoe sole 21 can be overmolded, glued or simply positioned on the central portion of the shell 41 and is made of a flexible and adhesive material such as synthetic or natural rubber, and by leaving the attachment portions 31, 32 exposed. As shown in FIG. 2 particularly, the attachment member 32 is thereby spaced below at least a portion of a lower surface of the boot by a dimension sufficient to allow reception of the latch 14 above the attachment member 32. 
     In this manner, only the central portion of the sole 21 will be rigidified, the other portions thereof remaining flexible, and the tactile and foot movement sensations will be preserved. 
     A collar 46, extending from the top of the heel to the calf zone, is journalled on the rear portion 43 of the shell. 
     Similar to the shell 41, the collar has shapes and dimensions that are optimized so as to allow a transmission of forces and the support necessary to the practice of the sport without overly rigidifying the shoe. 
     More particularly, this collar 46 can be connected to the shell 41 by lateral stays 47 to allow a rear support in turns called &#34;back side&#34; without harming the forward flexion capability that is indispensable to the practice of snowboarding. 
     Similar to binding devices of the shell type, the essential role of the collar 46 is to ensure a rear abutment for the foot. In association with a strap 25 arranged on the instep, the collar participates in the control of the forward flexion of the leg by cooperation with the rear portion 43 of the shell 41. 
     One will note that in the example represented, the collar 46 is journalled on the shell 41 about a longitudinal axis by means of a journal member 48, such a construction allowing a great possibility for the leg to pivot in the transverse direction. 
     This 48 could be replaced by a transverse journal member in the longitudinal direction of the shoe if more rigidity is desired in the transverse direction. 
     Of course, a liner 22 will be interposed between the skeleton 40 of the shoe and the foot 1 of the wearer, in a manner as to provide the necessary comfort. 
     This liner could be configured so as to offer the same sensations as a shoe of the traditional &#34;boot&#34; type. 
     Lastly, an exterior upper 23 will be provided to ensure the sealing of the assembly against snow/water, this upper being affixed to the sole 21 and preferably having the exterior aspect of a shoe of the traditional &#34;boot&#34; type. 
     The exterior upper 23 is provided, in a known manner, with closing and tightening means of the lacing type, or, as shown in the drawing, with straps 24, 25, 26, associated with attachment means of the buckle or self-gripping type. 
     In such a case, a tightening means or strap 25 is, more particularly, provided at the level of the instep. 
     As previously indicated, such a strap 25 cooperates with the collar 46 to control the flexion of the leg and, therefore, will be more or less flexible, so as to provide an information circuit very close to that of a shell/boot assembly. 
     All the anchoring means 27 of the different straps 24, 25, 26, or stays 47, are provided on the skeleton of the shoe, namely the shell 41 and the collar 46. These anchorings are obtained in any known manner, rivets, screws, etc. 
     In the case where the sole is not overcast or glued to the shell, it can simply be &#34;threaded&#34; and positioned thereon with the upper 23, and the attachment to the power circuit 41, 46 is then obtained by means of the anchoring means 27. Such an embodiment is particularly advantageous, for it allows the use of elements and technologies that are &#34;standard&#34; for the upper, the sole, the strap. Particularly, in the cases where the anchoring means 27 are screws, the assembly can be accomplished without particular tooling and can be removable. 
     According to that which precedes, one will understand that the invention makes it possible to obtain a snowboard shoe of the &#34;boot&#34; type having the advantages of such a shoe, but without having the disadvantages thereof, and being able to be, notably, associated with a retention device that is not very cumbersome and requires no adjustment. 
     A notable gain in weight and volume can also be obtained in the shoe/retention device assembly. 
     The invention is related not only to the shoe, but also to the associated retention device and the shoe/retention device thus obtained. 
     Of course, the present invention is not limited to the single embodiment hereinabove described by way of non-limiting example.