KR100514902B1 - Improved explosion resistant shoes - Google Patents

Abstract

Boots 10 are described which provide an increased level of protection against explosions. In an embodiment, the boot has a spear 12, an upper 11 and a lid 13 substantially surrounding the foot. The sheath may consist of aramid tissue 21 and / or an additional layer 22 of carbon fiber 21 and / or woven ceramic fibers or ceramic / glass-ceramic woven synthetic fibers. The window may combine the woven aramid with the carbon fiber layer and deflection plate 23 to provide enhanced protection. In another embodiment, the cover provides a quick and relatively inexpensive means of enclosing the boots and providing the wearer with improved protection against explosions.

Description

Improved explosion resistant shoes

TECHNICAL FIELD The present invention relates to the manufacture of shoes, and more particularly, to boots manufactured to protect the foot from serious damage caused by the impact of a projectile and explosion of a personal mine.

Adult mines, designed to explode on foot, present a common problem for troops deployed in normal combat or guerrilla warfare.

The amount of explosive present in a landmine determines whether it will cripple or die. In devices designed simply for damage, protective shoes can serve to reduce the likelihood of serious injury. The shoe may serve to reduce damage caused by the impact of projectiles such as bullets or shrapnel.

The present inventors can protect the foot of a person who touches a boots, in particular a personal mine containing a significant amount of explosive, while providing sufficient toe-heel flexion when the user wears boots to run, jump, climb Shoe soles have been developed for such activities (see Singapore Patent Application Nos. 9500037-8 and 9501007-0). Improved boots that would protect the wearer's feet or legs from mines that can penetrate boots of conventional designs using explosions or high temperature explosives caused by landmines containing large amounts of explosives would be desirable.

Summary of the Invention

According to one aspect of the invention, the invention is a shoe having a cover of explosion-resistant material substantially in the shape of surrounding a boot, the cover having a sole and an upper, connected to the boot or to the leg of the wearer's leg do.

The sole of the cover may be made of rubber or polyurethane and incorporate at least one layer of woven aramid fibers therein. The lid is preferably attached to the boots with a strap extending from the lid around the upper portion of the boots.

In another aspect of the invention, the invention provides a boot for a wearer's foot, the boot having a sole and an upper, the sole having at least one woven aramid layer inserted through the sole and having a cover of explosion-resistant material Is coupled to the rain boots, characterized in that substantially wrap the entire foot of the wearer.

In a preferred embodiment in both aspects above, the lid comprises at least one plate of explosion resistant material. The explosion-resistant material consists of aramid tissue comprising at least one layer of at least 1000 dtex aramid (eg Twaron 2010). It may consist of a woven 1200 dtex aramid, such as Twaron 2040, with a fine plain weave at 460 g / m ² . The cover may comprise a woven ceramic layer or ceramic / glass-ceramic woven synthetic fibers.

In the second aspect the cover is preferably shaped in the form of a bootee which can be inserted into the window or upper of the boot.

Aramid tissue with a protective layer in the cover can be bonded to a sandwich layer comprising a layer of woven ceramic fibers or a separate ceramic / glass-ceramic synthetic woven fiber to further increase the strength of the cover when exposed to high temperatures. The layer of woven ceramic fibers may comprise the outermost layer of the cover.

The window of the boot preferably consists of at least the outer part and the middle part. Outer windows are made of rubber or polyurethane shaped to meet the requirements of the boots. A cover portion extending through the window is located between the outer portion and at least one layer of woven aramid inserted into the window.

The middle part has multiple layers of woven aramids inserted therein. In an embodiment, the woven aramid layer has carbon graphite fibers and is interwoven with the aramid layer or between the aramid layers to further increase the strength of the window. In a preferred embodiment there are 24 layers of aramid, carbon and ceramic woven fibers (e.g. Toray, / BHR, M60 / M80 6K / 12K TOW plain weave, density ranging from 300 g / m ² to 600 g / m ² ).

The middle portion of the sole may include a deflection plate extending from the toe to the heel. The deflection plate preferably has a first side facing outward, which side has an angled side designed to deflect the effect of the explosion at the foot. The deflection plate may consist of synthetic aramid fibers and carbon fibers embedded in an adhesive / polymer. The ratio of aramid to carbon fiber in the composite material is preferably 50:50 and the strands of the fiber are approximately 85% in one direction along the toe-heel axis of the boot.

The sole may include an upper in contact with the wearer's foot. The upper is made of cut aramid and nylon fiberboard. In another embodiment, the upper portion includes at least four layers of woven aramid attached to an adhesive / polymer, such as nylon.

The boot upper is preferably made of leather and may have an outer leather layer and an inner back leather layer of leather or cotton, with a cover extending therebetween.

Stitching can be used to hold the layers that make up the original cover of the shoe. The stitching preferably consists of woven aramid yarns. Appropriate strength can be obtained by stitching and additional layers of woven aramid fibers (eg Twaron 2040) can be inserted in the middle of the window. Preferably, the aramid fibrous layer is above and below the at least one woven aramid layer in the middle portion and the additional layer at least partially extends to the upper of the boot.

The boots are preferably shaped to at least surround the wearer's ankle to increase the level of protection of the ankle or lower leg.

As in the examples below, preferred embodiments of the present invention will be described with reference to the following figures.

1 is a vertical sectional view of the boots according to the present invention.

FIG. 1A is a vertical sectional view of the cover present in the boots shown in FIG.

FIG. 2 is an enlarged cross-sectional view of an intermediate portion of the boots along the line II-II of the boots shown in FIG.

3 is a vertical cross-sectional view of another embodiment of a cover surrounding the rain boots.

Boots with features of the preferred embodiment of the present invention are generally represented by (10) in Figs. Boots 10 have a lid of an explosion resistant material 13 in the form of an upper 11, a compound window 12 and a bootee adapted to cover at least the wearer's foot and ankle in a standard form, at least the foot of the wearer. And to cover the ankle (see Figure 1A).

As shown in FIGS. 1 and 2, the entire upper 11 by including explosion resistant layers 18, 19 between the outer leather layer 25 and the inner leather layer 26 on top of the upper 11. Extend over. The layer is connected to the layers in the half-length portion 13 with suitable stitching 30.

The composite window comprises an outer polyurethane window 14 having a ground portion 17 of the shoe sole, a middle window portion 15 and an upper window portion 16.

The sheath 13 consists of at least one layer of ceramic or ceramic / glass-ceramic woven composite fibers and at least one layer of aramid tissue 18 constituting the outer sheath 19. In this embodiment, the aramid tissue 18 comprises at least one ply of at least 1000 dtex aramid having a vertical or plain weave (eg Twaron 2010). Layers 18, 19 surround the foot of the wearer of boots 10 and are positioned once in boots 10 and inserted into the upper boots portion 11 and are between the outer window 14 and the intermediate window 15.

In order to improve the explosion resistance of the window 12, the intermediate window 15 has multiple layers of woven aramid fibers 21 and carbon fibers 22 embedded in polyurethane. The deflection plate 23 extends from the toe of the window 12 to the heel and helps to further strengthen the window 12. The deflection plate 23 has an angled bottom surface 24, the angle of which is adapted to deflect the explosion effect from the foot of the wearer of the boot 10. The deflection plate 23 consists of a 50:50 composite of woven aramid and carbon fiber embedded in an adhesive / polymer.

Boot upper 11 is made of outer leather layer 25 and inner leather layer 26. The cover 13 is supported between the layers 25, 26.

To join the various layers, stitching 27 penetrating the side of the boot may be used as shown in the figure. Stitching 27 may be composed of woven aramid fibers (eg, 420 dtex aramid) and / or polyester. To improve the strength of the stitching, two additional layers of aramid fibers 28, 29 are inserted into the middle portion 15 of the window and extend into the upper 11, as shown in FIG. 2.

Boots with the features described above are effective in providing protection from explosions of personal mines containing at least 60 grams and possibly 80 grams of compressed Compound B explosives.

3, another embodiment of the present invention is shown. In this embodiment, the standard boot 40 with the sole 46 is surrounded by an outer cover 41 so that the boot 40 is positioned therein. The cover has the features of the cover 13 described above except for fitting the boots, and the cover 41 provides a quick and relatively inexpensive means of enclosing the boots and improving the explosion resistance of the standard boots. In the embodiment of the lid shown in FIG. 3, the lid 41 has a window 42 and an upper 43, which upper has an inner surface 47 and an outer surface 48. At least one layer of ceramic or glass-ceramic fibers 45 and one layer of woven aramid tissue 44 are inserted into the sole 42 and the upper 43. If desired, window 42 has four layers with a plurality of layers of woven aramid fibers, preferably polymers such as nylon and / or carbon fibers embedded therein. As described above, the deflection plate may be coupled into the window 42.

As shown in FIG. 3, the cover 41 may be tied to the boots with a string 49. The attachment means can be employed differently as desired.

It will be understood by those skilled in the art that many changes and / or modifications can be made to the invention without departing from the scope of the invention broadly described above. Accordingly, embodiments of the present invention should be considered in all respects as described above and not as restrictive.

Claims (19)

A boot for the wearer's foot, the boot having a spear and an upper, the window having at least one layer of woven aramid inserted through the window, the boot having a cover made of an explosion-resistant material bonded into the boot Boots to substantially or entirely surround the wearer's foot. The method of claim 1, Said cover having at least one plate of explosion resistant material inserted into said window and at least an upper of the boot. The method according to claim 1 or 2, Wherein said explosion resistant material consists of aramid tissue having at least one layer of at least 1000 dtex aramid. The method according to claim 1 or 2, Wherein said aramid fibers comprising an explosion resistant material are bonded into a sandwich of a layer of woven ceramic fibers or ceramic / glass-ceramic woven synthetic fibers to further increase the strength of the cover. The method according to claim 1 or 2, Said boot consists of an outer part and an intermediate part. The method of claim 5, Said outer window is made of rubber or polyurethane. anger. The method of claim 5, Said cover extending through said window between said outer portion and at least one layer of aramid inserted into said window. The method of claim 5, Said boot and said upper and / or upper part having a plurality of layers of woven aramid inserted therein. The method of claim 8, Wherein said carbon graphite fibers are interposed between said layer of woven aramid fibers. The method according to claim 1 or 2, And said window comprises a deflection plate. The method of claim 10, And said deflection plate being in the middle of said window. The method of claim 10, Wherein said deflection plate has a first surface facing said outer portion, said first surface being an angled surface to deflect an explosion effect from a wearer's foot. The method of claim 10, Wherein said deflection plate comprises a composite of woven aramid and carbon fiber embedded in an adhesive / polymer. The method of claim 13, Said boots, characterized in that the ratio of woven aramid to carbon fiber is 50:50. The method according to claim 1 or 2, The rain boots upper is made of an outer leather layer and an inner back leather or cotton layer, between which the cover portion extending through the upper is located. The method according to claim 1 or 2, Said boots are stitched together. The method of claim 16, Said stitching consists of woven aramid yarn. The method of claim 16, Wherein said two additional layers of woven aramid fibers are present in the middle portion of the window and at least partially extend into the upper of the boot. The method of claim 17, Wherein said layer of woven aramid fibers is positioned over at least one layer of woven aramid present in the middle portion of the window and one layer below.