WO2010128349A1

WO2010128349A1 - Boot for protection against "shock wave" anti-personnel mines

Info

Publication number: WO2010128349A1
Application number: PCT/IB2009/005619
Authority: WO
Inventors: Andres Duque; Esteban Perez
Original assignee: Andres Duque; Esteban Perez
Priority date: 2009-05-05
Filing date: 2009-05-05
Publication date: 2010-11-11
Also published as: EP2433514A1

Abstract

The BOOT FOR PROTECTION AGAINST "SHOCK WAVE" ANTI-PERSONNEL MINES comprises a simple and robust generic body-shield system for preventing injuries caused when an anti-personnel mine is triggered, said system being integrated into a boot. The system comprises a shield with threefold protection: a sole for absorbing pressure and thermal energy; a deflector for dissipating thermal energy in so far as it is broken down and reflects pressure, a main shield for containing the pressure shock wave and a secondary shield for providing protection from fragments, which together dissipate the shock wave, and provide protection from high temperatures and from the fragments generated during the explosion of the artefact. The land conditions for which the invention has been developed, lightweightness, size and flexibility to facilitate use, and lower costs and triple protection (fragments, shock wave and high temperature) are aspects taken into account and incorporated in this invention.

Description

DESCRIPTION

BOOT OF PROTECTION AGAINST ANTIPERSONAL MINING OF THE SHOCK WAVE TYPE

1 - TECHNICAL FIELD

This invention is related to a "boot" type footwear for military and / or civil use, whose main purpose is to protect a person from the explosion or contact with a buried antipersonnel mine of industrial or artisanal types, preventing who The use of the consequences to which he would be exposed without this protection or at least minimizing these consequences.

For their part, some non-state groups have manufactured antipersonnel mines, using artisan techniques that have already been used in Africa and Latin America. The most popular are the so-called 'bankruptcy' mines, used by various insurgent groups in the world.

The 'bankrupt' mines; They are generally activated with pressure or pressure relief mechanisms and are manufactured with cheap and easy-to-get materials such as battery peels, wires, PVC pipes, plastic bags, lace, scrap, etc. Because of the ease and speed with which these mines are built, they are the most common in the country and it would be impossible to determine how many mines of this type exist in the world.

The buried antipersonnel mines of the industrial or artisanal types produce three consequences: The first has to do with the impact or the explosive force of the mine or shock wave; the second has to do with the fragmentation generated in the explosion and the third with the high temperatures generated by the explosion. The latter are much more harmful when the size of the mine increases. Crafted mines, have a much higher explosive charge, are also more difficult to detect and have greater destructive powers.

In the world there are many countries with high risk of victims of buried antipersonnel mines and especially those of the artisanal type - 'bankruptcies' - that have an explosive capacity greater than conventional ones and that is where solutions to this serious problem are required. Colombia had 2,293 victims of Anti-personnel Mines (MAP) between 2005 and 2006, which led it to occupy the first place of cases worldwide.More than 50% of the Colombian territory presents this problem, making agricultural productivity has decreased in areas with MAP influence due to the fear of peasants to cultivate and move quietly along the roads, a situation that is repeated in many countries.

The solutions or contributions of other inventions to this problem do not generate sufficient protection, especially when it comes to artisanal mines, which are currently the ones that cause the greatest damage to humanity.

Particularly in Colombia, there is an average of three daily victims and 97% of accidents occur in rural areas. It is estimated that in Colombia there are between 70,000 and 100,000 planted mines and each can maintain its capacity to explode for about 30 years. Ironically, an antipersonnel mine costs between USD 0.75 and USD 80, but its removal can be between USD 300 and USD 800. The rehabilitation of a person who falls victim to a MAP costs around USD 120,000. 2 - STATE OF THE TECHNIQUE

Traditionally, forms of protection against MAPs have been carried out through other types of boots or other types of protection, which, although they may partially reduce some of the consequences of contact with an antipersonnel mine, do not provide sufficient protection against the three phenomena or consequences that derive from the contact with the mine; or, they can provide some protection against the three phenomena, but they have a high cost that makes them inaccessible to those who require them or are quite uncomfortable, which does not make them practical for daily use for long hours or if a high degree of mobility is required .

So far, attempts to solve the problem have been used:

1. The invention US3,061,951 of Barran describes the sole of a military type boot, which assembles a honeycomb as its core. The protection mechanism consists in moving the user's foot away from the explosion point of the mine; with the honeycomb core increases the ground clearance. This has the disadvantage that the honeycomb-like structure in conjunction with geometries present in the sole can generate directed charges that enhance the penetration effect of the explosive charge.

2. The invention US 5,237,758 of Zachman describes the reinforcement of a sole of safety footwear made up of several semi-elliptical sections of fabrics, which are embedded in the sole and crossed by meshes and beams of metallic material that provide resistance against penetration. This has the disadvantage that it does not provide protection against the thermal gradients generated by the explosion. 3. Aleven's invention US 5,285,583 describes a sole with an insole for safety footwear with injected plastic reinforcement and with metal shroud to provide penetration protection. This has the disadvantage that despite presenting penetration protection it is not viable for protection against shock waves.

4. Sanders invention US 5,926,977 describes a foot protection accessory consisting of a parallelepiped or box made of balsa wood or materials with sound insulation properties where the foot is inserted with regular footwear. The accessory is provided with a layer of thermo-resistant material, a layer of impermeable material and a layer of penetration-resistant material. It is designed to avoid mutilations in the user when operating antipersonnel mines. This has the disadvantage that it is not designed for steep terrain and does not adapt naturally to the user's foot.

5. The invention US 5,979,081 by Vaz describes a safety boot resistant to fragments and shock waves composed of a rubber outsole with an inner sole embedded inside the exterior in Kevlar® 49. Likewise, it incorporates an inner lining to the boot with 4 layers of Kevlar®, which is sewn to the midsole. The inner shield of the boot is made with adhesives. This has the disadvantage that the shielding material is calcined when the explosive present in the mine has high detonation speed.

6. Lohrmann's invention US 5,992,056 describes an antipersonnel mine protection template composed of at least 30 layers of a high strength fabric. The template is formed by a first high strength fabric interspersed with a second fabric of equal or less resistance. Use as the first kevlar® fabric and as the second spectra® fabric. The fabrics are sewn on the edge forming a grid. This has the disadvantage that the shielding material is calcined when the explosive of the mine has high detonation speed, this type of explosives, generate high thermal gradients.

7. The invention US 6,006,646 of Makris et al. describes a system of protection against antipersonnel mines that consists of an accessory that is assembled at the foot of the user with their regular footwear, it has 4 legs that lift a platform from the ground, the platform has in its bottom a deep v shape that reflects the wave of the explosion of the antipersonnel mine sideways. This has the disadvantage that it is not designed to be used as regular footwear, since it does not adapt naturally to the foot, it generates fatigue and limits the user's mobility capacity.

8. Vaz invention US 6,425,193 describes a protective boot and the configuration of its sole. It contains a corrugated structure, a flat sheet of resistant material and a rubber sole. The corrugated structure is made of metal or a ceramic composite of metallic matrix and located in the heel, in the frontal section of the sole of the foot, or from the heel to the front of the plant. By covering the foot, specifically between the foot and the outer covering, there is a one to three armor capable of Twaron ®, the layers are bonded with hot melted polyurethane base adhesives. Between the shielding material that covers the foot and the corrugated structure there is a sheet of at least 15 layers of woven aramid and woven ceramics in the lower part. This has the disadvantage that the corrugated sheet of metallic or ceramic metal matrix material generates fragments that can be potential ballistic fragments since they are released after the explosion. 9. Vaz US 6,505,421 describes the sole of a safety boot resistant to fragments and shock waves based on a polyurethane sole on a polyester basis with aramid material woven and embedded in the sole; This material is impregnated with polyester or polyester polyurethane to improve the adhesion between the reinforcement and the material of the sole, carbon fibers or glass s can be embedded in the reinforcement to improve thermal resistance. This has the disadvantage that the configuration of the reinforcing fibers although they have adhesives that improve compatibility, cannot be located in the amount necessary to achieve protection levels for unconventional mines.

10. The invention US 6,655,051 by Peche et al. describes a protection device against the effects of antipersonnel mines. This device consists of a V-shaped sole (boat hull shape) with a hardness of 40 to 80 shore A. The geometry of the sole reflects the shock wave of the explosion. This has the disadvantage of the V-shaped geometry has a high inertia that hinders the mobility of the user and also the V-shaped sole does not dissipate the thermal energy generated with explosives of high detonation speed.

11. The invention US 6,725,572 of Krstick describes a type of footwear for protection against antipersonnel mines composed of an inclined sheet in the sole to reflect waves of explosions and a protection on the sole made of polycarbonate, the inclined sheet can be metallic and have material explosive to contain the force of the explosion under it. This has the disadvantage of the material of the inclined sheet can become ballistic particles causing injury to the user. From the attempts made to solve the existing problem, it has been seen that in general there are two alternatives to obtain protection against antipersonnel mines:

• Accessories that adapt to footwear do not solve the problem because when there are steep terrain and the presence of antipersonnel mines is a constant these devices generate fatigue in the user and limit mobility.

• The shields adapted to footwear such as those described are not sufficient because they generate solutions where there are high thermal gradients or pressure waves and it has been seen that for artisanal mines these two effects can be presented together limiting the efficiency of these inventions to low explosive charges

The alternatives described were analyzed in Andean equatorial territories with high incidence of accidents with buried antipersonnel mines and it was found that given the difficulty of traveling the terrain in transport vehicles, the solution to the problem must be of the armored footwear type, which has comfort for the user and present the appropriate level of protection taking into account that the type of mines present in these lands are unconventional and have loads on average six times greater than those of industrial mines and types of explosives that vary depending on the area where the mine is manufactured. Since the mines planted in the previously named territory have charges that vary in explosive power and in explosion temperature, controlled tests have been carried out and it has been found that the armor levels offered by current developments are susceptible to explosives that generate shock waves and high thermal gradients. The invention "PROTECTION BOOT AGAINST ANTIPERSONAL MINING OF THE SHOCK WAVE TYPE", are infantry boots that have MAP protection, which diminish the effects and injuries that these devices cause on the lower extremities of the users. The boots use body armor and shock wave deflection mechanisms to generate adequate protection for the type of artisanal MAP such as those planted in Colombian territory and that prevent both the shock wave and the high temperatures that also cause serious consequences on the victims or simply calcine the shield leaving the user's limb exposed to the shock wave. They are also effective against the fragmentation generated in the explosion; They are easy to use even on steep terrain and do not generate excessive fatigue even in long hours of use and also have an accessible cost to those who require them.

The relevance of the "Anti-personnel mine protection boot / of the Mine Pro shock wave type" consists in overcoming the inconveniences presented by the inventions described in the state of the art. Because the antipersonnel mines against which the present invention protects are of the unconventional type, that is, the explosive charge and the thermal effect generated are superior to those generated with conventional mines (industrially manufactured and with low levels of explosive).

3 - DESCRIPTION OF THE PATENT

The present invention ⁿ ANTIPERSONAL MINING PROTECTION BOOT OF THE SHOCK WAVE TYPE "consists of an armor system composed of four elements within a boot to provide protection against buried anti-personnel mines of the industrial and artisanal type that produce shockwave, fragmentation and high temperatures, which arises from the need of the armed forces and more specifically of the mobilized bodies on foot, to have a protection mechanism against antipersonnel mines planted in the field of operations.The presented solution has been found useful not only for infantry bodies of the armed forces and police but also for civilian personnel such as peasants, journalists and personnel in general who, due to the nature of their occupation, require mobilization in areas where there are known or suspected events with antipersonnel mines.

A body armor device integrated in a piece of footwear that protects the user against mutilations and injuries caused by buried antipersonnel mines. The one described here is an armored boot against buried antipersonnel mines composed of an energy dissipating soleplate (figure 1, literal B), a wave deflector with wave deflector channels (figure 1, literal A), a main shield ( figure 1, literal I), superior to the armor that is made in a shoe with armor and a secondary armor (figure 1, literal J) - (figure 1, literal H). The sole plus the deflector protects against high temperatures and the shock wave; the main shield protects from fragments and also absorbs the shock wave; secondary shielding also protects from fragments. In this way, this invention protects against the three phenomena that arise from contact with a buried antipersonnel mine of the industrial or artisanal type. The ground conditions for which the invention has been developed, lightness, size and flexibility to facilitate use, as well as lower costs, have been taken into account and incorporated into this invention. These improvements have been achieved by means of a three-stage shield that consists of a rigid sole made of high thermal resistance rubber, a wave deflector made of Vinylester novolac epoxy, A vinylester epoxy bisphenol, E glass fiber and fiberglass. carbon, a main shield made of polychloroprene fiber reinforced with po / iaramide fibers and a side shield made of polychloroprene reinforced with polyamide fiber; protecting in this way against the two types of mine (industrial and artisanal), protecting against the three effects (shock wave, fragments and high temperatures) and fulfilling the most important functions (mobility, comfort and low cost compared).

The boots have vulcanized elastomers (figure 1, literal B) in the energy dissipating sole, which disintegrate with the shock and heat wave generated by a handmade anti-personnel mine. It integrates a wave deflector made of fiber reinforced plastic that has a semicircular channel geometry (figure 1, literal A) - (figure 1, literal C), which diverts the shock energy emitted by the antipersonnel mine. Likewise, a main shielding template is incorporated (figure 1, literal I) assembled to the shoe cap and made of polymeric fabrics joined with adhesives. In addition, the boot for protection against antipersonnel mines, has internal shielding to the lining of the footwear (figure 1, literal J) - (figure 1, literal H), composed of polymeric fabrics assembled with seams between their ends and adhered to the footwear with polymeric adhesives.

The energy dissipating sole is mechanically assembled to the footwear either attached or by means of direct injection or vulcanization mechanisms. The wave dissipating mechanism has semicircular canals (figure 1, literal A) - (figure 1, literal C) - (figure 1, literal D) located longitudinally and transversely in the heel and footwear area. It adheres with adhesives to the main shield that has been cooked to the cap.

To ensure that the protective boot is effective against artisanal mines, it is necessary to ensure high thermal resistance. This thermal resistance is achieved by the combined effect of the rubber sole and by a shock wave deflector.

The shock wave deflector is a wavy sheet of semicircular geometry which is embedded in the sole in the heel section, in the sole and covering part of the arch of the foot. The deflector is made by:

1) Vacuum-assisted resin infusion (VA-Infussion).

2) Resin transfer by injection (RTM).

3) Resin injection by light transfer (RTM Light), or autoclave molding.

The manufacturing process of the baffle (figure 4) or mold is carried out in two stages: The first (figure 3, numeral A) is made with Chopped Strand Matt of fiberglass E of 600 gr / m ² , with flat fabric of 320 g / m2 non-twisted fiberglass threads, this first stage is made with vinyl ester novolac epoxy resin with a reinforcement resin ratio of 0.4. This first stage has a silicone mold, variations of this invention include plastic films. The use of rigid or semi-rigid counter molds can leave residues of mold release agents in the interface between the first and the second stage reducing the Young's modulus of the deflector, to the extent that there is slippage between the two stages. The second stage of the deflector (figure 3, numeral B) is carried out with a second counter mold, the lamination consists of flat fabrics of non-twisted high modulus carbon threads, alternated with 220 gr / rrf Chopped Strand Mat nonwoven mantles , 5 layers of non-woven mantles of glass E and flat fabrics of non-twisted carbon threads are made. The infusion is carried out with bisphenol vinyl ester epoxy resin A ₁ variations of the invention include infusion with epoxy resin, without non-woven glass mantles E If the variation with epoxy resin is applied, the number of layers of the first stage should be increased since the non-woven glass mantles It increases resistance against high temperature, while the carbon content increases the mechanical resistance against the pressure shock wave. In all cases, post curing of the baffle must be performed to increase the glass transition temperature of the compound.

Variations of the invention where a higher level of protection is required can be made by increasing the number of layers without losing its protection, mobility and cost characteristics and making combinations of different flat yarn fabrics, unidirectional fabrics and other types of thread fabrics. non-twisted as polyphenylenterephthalamide (aramid) fibers, boron fibers, S glass and basalt fibers.

In controlled tests with mines loaded with explosives of high detonation speed 7000 m / s, it has been found that the efficiency of the deflector is increased by containing the two stages. It has also been found that the plastic composite material reinforced with ceramic fibers is suitable for the application since the epoxy bisphenol A vinyl ester resin decomposes due to the effect of high temperature, as well as the nonwoven layers of fiberglass E ₁ during this calcination the thermal energy released by the explosive that has already decomposed the sole, decomposes the deflector. This has two effects, the thermal energy dissipates before reaching the main shield and directs part of the pressure shock wave towards the outside of the boot, protecting it from this form to the user of the high temperature and decreasing the effect of the pressure shock wave.

On the shock wave deflector is the body of the boot that includes the secondary shield (figure 1, literal H) against fragments and main shield, the capped, the buttress, the bellows and the rod, this one has the main shield in the area of the trim.

The cane and the buttress are shielded with layers of 200 gr / m ² , alternated with layers of 450 gr / m ² of flat fabrics of non-twisted yarns of aromatic polyparaphenylterephthalamide fibers, these layers are bonded with polychloroprene contact cements. The inventor has found that laminates made with polyparaphenyleneterephthalamide and polychloroprene increase the ballistic resistance since ballistic particles have to tear the adhesive between the layers of the reinforcing material increasing the energy absorption in the shielding system. The shield consists of one or more alternating layers of non-twisted strands of 200 gr / m ² and 450 gr / m ² polyparaphenyleneterephthalamide flat fabric with polychloroprene contact cements.

The secondary shield is sewn to the template area to the main shield with nylon threads. The main shield is composed of layers of flat fabric of non-twisted threads of poliparaphenyleneterephthalamide of 200 gr / m2 and 232 gr / m ² , laminated with polychloroprene contact cement. The inventor has found in 14 layers of 200 gr / m ² and 2 layers of 232 gr / m ² an important and adequate level of protection; The use of 2 layers of non-woven fiberglass mantle E of 600 gr / m ² provides a final thermal protection barrier. These are sewn against the polyethylene terephthalamide laminated baffle adhered with polychloroprene. Future variations of the invention include a higher number of layers and the use of flat fabrics of non-twisted yarns of ultra high molecular weight polyethylene and other types of fabrics, without altering the cost and comfort characteristics.

The main shield is sewn in the lower part of its perimeter with the leather section of the hood and the boot shaft that has no side shield. Sewing is done with nylon threads.

The body of the boot with the side shield and the main shield, is positioned in a vulcanizing press, inside the press the shock wave deflector is located. The molten rubber is added, the baffle is embedded between the sole.

4 - DESCRIPTION OF THE FIGURES

FIGURE 1:

Figure where the longitudinal section of the boot is observed with the shielding system.

FIGURE 2:

Figure where a cross section of the heel is observed.

FIGURE 3:

Scheme of rolling the two stages of the wavy baffle.

FIGURE 4:

Scheme of main shield laminate

Claims

- CLAIMS

1. The "PROTECTION BOOT AGAINST ANTIPERSONAL MINING OF THE SHOCK WAVE TYPE" is characterized by being composed of an outer body with secondary shielding (figure 1, literal G) adhered to the interior of the leather jacket of the boot (figure 1, literal H) - (figure 1, literal J), composed of several layers of polyparaphenyleneterephthalamide bonded with polychloroprene adhesives, which is a boot of conventional exterior design, with a sole (figure 1, literal B) that has a rigid deflector embedded in the heel (figure 1, literal A), several rigid armored deflectors articulated in the plant (figure 1, literal C) - (figure 1, literal D) and a main shield between the sole (figure 1, literal I).

2. The "PROTECTION BOOT AGAINST ANTIPERSONAL MINING OF THE SHOCK WAVE TYPE" according to claim 1, has the main shield (Figure 1, literal I) formed by alternating layers of flat polyparaphenyleneterephthalamide fabrics bonded together with polychloroprene adhesives.

3. The "ANTIPERSONAL MINING PROTECTION BOOT OF THE SHOCK WAVE TYPE" according to claim 1, the outer body of the boot (figure 1, literal G) is composed of a leather cover or textile polymeric fabrics; Inside this is an insulator of non-woven mantles of ceramic materials, flat fabrics of ceramic materials, adhered to the outer shell with polychloroprene adhesives and several layers of flat fabrics of threads of polyparaphenylenerephthalamide configuring the secondary shield (figure 1, literal H) and (figure 1, literal J).

4. The "PROTECTION BOOT AGAINST ANTIPERSONAL MINING OF THE SHOCK WAVE TYPE" according to claim 1, has the sole a rigid armor embedded in the heel formed by a material composed of reinforcements of non-woven mantles and ceramic flat fabrics, in a matrix of thermosetting resin that make up the heel deflector (figure 1, literal A).

5. The "PROTECTION BOOT AGAINST ANTIPERSONAL MINING OF THE SHOCK WAVE TYPE" according to claim 1, the sole has a wave deflector or rigid shield embedded in the metatarcial zone plus clipping, consisting of several rigid sheets made of material, composed of reinforcements of non-woven mantles and ceramic flat fabrics, in a thermosetting resin matrix. These sheets are articulated to allow mobility of the sole that make up the baffle-plant (figure 1, literal C) - (figure 1, literal D).

6. The "PROTECTION BOOT AGAINST ANTIPERSONAL MINING OF THE SHOCK WAVE TYPE" according to claim 2, the outer body of the boot has a cover to which a thermal insulator composed of one or more layers of nonwoven layers of fibers adheres ceramics or one or several layers of flat fabrics of ceramic fibers or combinations of flat fabrics and non-woven mantles. These layers are adhered to the outer shell with polychloroprene adhesives (Figure 1, literal J).

7. The "PROTECTION BOOT AGAINST ANTIPERSONAL MINING OF THE SHOCK WAVE TYPE" according to claim 2, has the outer body of the boot an insulator of ceramic fibers to which adheres a secondary or lateral shielding consisting of one or several layers of flat tissue of polyparaphenyleneterephthalamide fibers (Figure 2, numeral F).

8. The "PROTECTION BOOT AGAINST ANTIPERSONAL MINING OF THE SHOCK WAVE TYPE" according to claim 3, the sole has a rigid shield embedded in the heel section (figure 1, literal A), composed of 2 thermostable resin matrices (figure 3, literals A and B). The first material is a material composed of non-woven mantles of ceramic fibers with a matrix of epoxy resin novolaca vinylester epoxy resin novolaca. The second material is a composite of non-woven mantles of ceramic fibers with flat ceramic fabrics in an epoxy bisphenol A vinyl epoxy bisphenol resin matrix.

9. The "PROTECTION BOOT AGAINST ANTIPERSONAL MINING OF THE SHOCK WAVE TYPE" according to claim 4, the sole has a rigid shield embedded in the metatarcial section plus coping composed of several articulated blades (figure 1, literal C) - (figure 1 , literal D), made of a material composed of 2 thermosetting resin matrices. The first material is a material composed of nonwoven mantles of ceramic fibers with a matrix of epoxy novolac vinyl ester or novolac epoxy resin. The second material is a composite of non-woven mantles of ceramic fibers with flat ceramic fabrics in a matrix of epoxy bisphenol A vinyl ester or epoxy bisphenol.

10. The "ANTIPERSONAL MINING PROTECTION BOOT OF THE SHOCK WAVE TYPE" according to claim 7, alternates the layers of polyparaphenyleneterephthalamide flat fabric with polychloroprene adhesives. These layers alternate with one or more layers of polyparaphenyleneterephthalamide flat fabrics with polychloroprene adhesive. Polyparaphenylerephthalamide tissues should be 123 gr / m ² or more.

11. The "PROTECTION BOOT AGAINST ANTIPERSONAL MINING OF THE SHOCK WAVE TYPE" according to claim 8, has on the sole a rigid shield composed of two materials. The first material consists of a thermosetting plastic matrix reinforced with ceramic fibers consisting of vinyl novolac epoxy resin novolac epoxy resin reinforced with ceramic glass, carbon, basalt or boron fibers. The fibers are nonwoven mantles of short fibers smaller than 10 cm of non-twisted yarns or flat fabrics. The second material is a composite of epoxy bisphenol A vinyl ester or expoxinolaca vinyl ester reinforced with non-woven layers of glass fibers and flat fabrics of ceramic fibers. The flat fabrics of ceramic fibers are glass fibers, carbon fibers, basalt fibers or boron fibers. The nonwoven mantles of ceramic fibers have a surface mass of 150 gr / m ² or more, the flat fabrics of ceramic fibers have a surface mass of 123 gr / m ² or more. These two composite materials are superimposed the first over the second.

12. The "ANTIPERSONAL MINING PROTECTION BOOT OF THE SHOCK WAVE TYPE" according to claim 8, in the rigid shield or shock wave deflector, located in the heel and composed of two polymeric materials reinforced with ceramic fibers, has a section transverse wave located in the direction in which the channels are parallel to the greater length of the foot (Figure 2).

13. The "PROTECTION BOOT AGAINST ANTIPERSONAL MINING OF THE SHOCK WAVE TYPE" according to claim 9, in the rigid shield or shock wave deflector, located in the metatarcial zone and wrapping and composed of two polymeric materials reinforced with ceramic fibers, It has a wavy cross section located in the direction in which the channels are perpendicular to the longest length of the foot (figure 1, literal C) - (figure 1, literal D). These channels overlap at one or several points to give flexibility to the sole.