WIDTH-AND LENGTH-ADJUSTABLE BOOT

Abstract

A length- and width-adjustable boot including: a forward base component (BA), a rearward base component (BP), a right side (LR), a left side (LL), and a locking system for said components. The four components (BA, BP, LR, LL) are linked together by rails. The slope of the rails of one of the bases (BP or BA), with regard to the axis of symmetry of the base of the boot, is determined by the length/width ratio of the foot. The movement of any of the four components causes a movement proportional to the width and length of the foot in the other three. The locking system locks the four components of the boot to be worn.

Claims

1-6. (canceled)

7. A length- and wide-adjustable boot comprising: a rearward base piece (BP) including a left inner rail of rearward base (BPr1) and right inner rail of rearward base (BPr2) with an inclination of the rails with respect to an axis of symmetry of the boot with an angle α determined by a ratio length/width of a foot comprised between 0° and 90°; a forward base piece (BA)having a left forward inner rail (BAr3) and right forward inner rail (BAr4), perpendicular to the axis of symmetry of the boot; a right-side piece (LR) with at a bottom end a rearward rail on a right side (LRr2) and a forward rail of a right side (LRr4), so that the rearward rail of the right side (LRr2) couples with the right rail of the rearward base (BPr2) and the forward rail of the right side (LRr4); a left side piece (LL) having at a bottom end a rearward rail of a left side (LLr1) and forward rail of the left side (LLr3), so that the rearward rail of the left side (LLr1) couples with the left rail of the rearward base (BPr1) and the rearward rail of the left side (LLr3) couples to the left rail of the rearward base (BPr3); an only fixing and adjustment system that allows to move the rearward base piece (BP), the forward base piece (BA), the left side piece (LL) and the right-side piece (LR) simultaneously, so that the movement of any of the four pieces (BP, BA, LR, LL) produces a proportional movement to the width and length of the food in the other three pieces; and a right-side piece (LR) with at a bottom end a rearward rail of a right side (LRr2) and a forward rail of a right side (LRr4), so that the rearward rail of the right side (LRr2) couples with the right rail of the rearward base (BPr2) and the forward rail of the right side (LRr4).

8. The length- and wide-adjustable boot according to claim 7, wherein the fixing and adjustment system are a threaded screw (SREW) with a circlip or safety ring.

Description

EXPLANATION OF THE FIGURES

[0023] To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, it is enclosed as an integral part of the said description, a set of drawings in where, for illustrative and non-limiting purposes, the following has been represented:

[0024] FIG. 1—You can see a 3D design of the set of parts. Forward base (BA), rearward base (BP), left side (LL), right side (LR), fixing screw (Screw), and safety ring (SR).

[0025] FIG. 2—you can see a 3D design of the right side (LR) and left side (LL) with their respective rail LRr2, LRr49 and LLr1, LLr2.

[0026] FIG. 3—you can see a 3D design of the forward base (BA) and rearward base (LR), with their respective rail. The pieces have been made transparent to be able to appreciate the inner rail BPr1,BPr2 and BAr3, BAr4.

[0027] FIG. 4—you can see a 3D design of the whole set of parts, BA, BP,LL, LR, fixing screw (Screw), and safety ring (SR). The forward base (BA) and rearward base (BP) have been made transparent so that all the rail can be appreciated. The angle α can also be seen drawn, which indicates the inclination of the rail of the rearward base (BP), with respect to the axis of symmetry of the boot (X axis).

[0028] FIG. 5—you can see a simple conceptual scheme, made up of the forward base (BA) and the rearward base (BP), and a screw (Screw), which runs through the axis of symmetry X. The inverted trapezoid shape of the total forefoot base comes determined by the ratio of the width of the forefoot to the heel (angle β). Two rail run inside the rearward base (BP) (BPr1, BPr2), inclined. The angle α of inclination of the rail determines the foot length/width ratio.

[0029] FIG. 6—you can see a simple conceptual diagram in which the pieces BA, BP, LL, LR are represented joined by the rail. Arrows indicate the directions of movement of all the pieces along their respective rail.

[0030] FIG. 7—you can see the calculation of the angle Alpha, α=arc tg B/L.

[0031] FIG. 8—you can see the calculation of the angle Beta, β=arctg (B−Y)/2/X).

PREFERRED EMBODIMENT OF THE INVENTION

[0032] In FIG. 1 we can see that the boot object of the invention comprises:

[0033] 1. a rearward base piece (BP)

[0034] 2. a forward base piece (BA)

[0035] 3. a right side piece (LR)

[0036] 4. a left side piece (LL)

[0037] 5. an adjusting and fixing screw (Screw)

[0038] The four pieces, forward base, rearward base, right side and left side are connected to each other by rail. The rearward base has two inner rail (BPr1, BPr2). The inclination of these rail with respect to the axis of symmetry of the boot is determined by a. The forward base piece has two inner rail (BAr3, BAr4) perpendicular to its axis of symmetry.

[0039] The side pieces have two rail each. The right side piece (LR) has the rail (LRr2, LRr4), and the left side piece (LL) has the rail (LLr1, LLr3). So that the LLr1 and LRr2 rail couple into the rail of the rearward base (BPr1, BPr2), and the LLr3 and LRr4 rail on the rail of the forward base (BAr3, BAr4).

[0040] Any displacement of one of the four pieces causes a displacement in the other three.

[0041] To adjust and fix the assembly of parts in a simple way, a screw (Screw) is placed at the back of the forward based piece (BA). This screw runs along the axis of symmetry of the rearward base, thread in the rearward base piece (BP), and is fixed to the assembly by means of a safety ring or circlip.

[0042] When the screw threads clockwise (screw tightening), the forward and rearward bases are closer to each other (the boot becomes shorter), and the sides also get closer to each other (the boot becomes narrower). When the screw rotates counterclockwise, the opposite effect occurs, the bases (BA, BP), and the laterals (LL, LR) move away, making the boot wider and longer.

[0043] The angle α determines the ratio between the length and width of the boot each time it is acted on the fixing screw. And the angle β determines the trapezoidal shape of the base of the boot due to the difference in width between the heel of the foot, and the instep.

[0044] To calculate the angles α and β, we take into account the anatomical tables of Chockalingham (REF: Chockalingam N & Ashford RL (2002) Foot length ratios for selected dimensions in a non clinical male simple). According to these tables, approximate ratios for the dimensions of the foot are fulfilled. Dimensions X, Y, B, L, and calculation of the angles α and β are described in FIGS. 4 and 5.

TABLE-US-00001 L/B = 3.3 L/Y = 5.5 L/X = 1.3

[0045] Therefore, for L=1 we have Y=0.18, B=0.3 and X=0.77.

β=arctg (B−Y)/2/X; β=4.5°

α=arc tg B/L; tg α=B/L; α=16.85°

[0046] The length of the forward and rearward bases, and the length of the set screw determine the range of foot sizes that the boot is suitable for.

[0047] Thus, for a minimum foot size 36EU (22 cm), the forward and rearward bases must add up to 22 cm in length. And for a maximum foot size of 46EU (28.5 cm), the adjusting screw should measure at least the length of the base above plus the difference in length between sizes.

[0048] Sufficiently described the nature of the present invention, as well as the way of putting it into practice, it is stated that, within its essentiality, may be put into practice in other embodiments that differ in detail of the one indicated by way of example, and to which the protection that is sought will also reach, provided that there is no alteration, change or modification of its fundamental principle.