RU2128320C1 - Armored jacket - Google Patents

Abstract

FIELD: means of protection of human-being against bullets, fragments, thrust and cutting objects. SUBSTANCE: armored jacket has a cloth cover with flexible laminated protective packs of wear-and-tear-proof fabric arranged in it, and pockets located on the cover with rigid armor plates installed in them; the armor plates have a ceramic layer installed on a rigid non-fragile backing; ceramic layer thickness L₁ and backing thickness L₂ relate as: L₀/C₀< L₁/C₁+L₂V_p, where L₀ - bullet slug length, C₀ - velocity of longitudinal waves in bullet slug; C₁ - velocity of longitudinal waves in ceramic layer; V_p - bullet velocity. Installed from the outside on the rigid armor plates are anti-ricochet plates made of plastic metal or laminated packs made of wear-and-tear-proof fabric. EFFECT: enhanced protective qualities of armored jacket at an impact of bullets with a high-hardness slug, reduced impact beyond obstacle, reduced probability of hitting by ricochet and improved convenience in use. 5 cl, 3 dwg

Description

 The invention also relates to means for protecting the human body from bullet, shrapnel, piercing and cutting objects.

A known design of flexible armor, consisting of a layered woven front part and a back part connected to it from a material of the type of felt (see US patent N 4608717, MKI ⁴ F 41 H 1/02, 02.09.86).

 The disadvantage of this design is the low resistance to bullets from a firearm.

A known construction of a bulletproof vest containing a vest of multilayer fabric, on which rigid protective plates are stopped outside (see French application N 2431674, MKI ⁴ F 41 H 5/04, 1/02, March 21, 1980).

 The disadvantage of this design is the low protection against bullets with a core of increased hardness from a backstroke, rebound and fragments, as well as low operational properties.

 The technical result of the invention is to increase the protective properties of body armor when hitting bullets with a core of increased hardness, reducing backward impact, reducing the likelihood of ricochet injuries and improving ease of use.

 The specified technical result is achieved as follows.

A bulletproof vest is proposed that contains a fabric cover with flexible layered protective bags made of high-strength fabric and pockets placed on the cover with hard armor plates installed in them, characterized in that the armor plates are made with a ceramic layer mounted on a rigid, non-fragile substrate, the thickness of the ceramic layer L ₁ and the thickness of the substrate L ₂ are in the ratio:
L ₀ / C ₀ <L ₁ / C ₁ + L ₂ / V _n
where L ₀ is the length of the bullet core;
C ₀ - the propagation velocity of longitudinal waves in the core of the bullet;
C ₁ - the propagation velocity of longitudinal waves in the ceramic layer;
V _n - the speed of the bullet.

 The implementation of each armor plate with a ceramic layer mounted on a rigid substrate, subject to the above parameters, allows to achieve destruction of the bullet core faster than the destruction of the armor plate, which helps to increase the protective properties.

 Outside, hard armor plates are equipped with anti-rifle plates made of ductile metal, or layered bags made of high-strength fabric.

 The bulletproof vest may additionally contain floors covering the pockets of the cover with armor plates, on the chest side, embedded in the side seams of the cover, with central fasteners and pockets for fighter's equipment placed on them.

 The bulletproof vest may additionally contain a cape with installed protective layered elements of high-strength fabric to protect the neck and shoulders.

 In addition, the bulletproof vest further comprises a belt transport loop located on the back of the cover and an unloading belt located at the bottom of the cover.

 The execution of the vest with a cape, in which the protective layered elements of high-strength fabric are stopped, protecting the shoulders and neck, allows to increase the protection area.

 Installation on the back of a belt loop of transportation allows to increase operational properties.

 The implementation of body armor with an unloading belt allows you to transfer part of the load to the hips, unloading the spinal column, which increases ease of use.

 Patent studies have shown that no solutions having features similar to the distinguishing features of the present invention were found, which gives the right to judge the materiality of the differences between these signs. And the combination of essential features gives the invention new properties - it increases the protective properties when hitting bullets with cores of increased hardness, reduces barrage impact, reduces the likelihood of bullets and armor fragments being damaged by ricochet, and improves operating conditions.

 The invention is illustrated by drawings. In FIG. 1 shows a general view of body armor. In FIG. 2 shows a general view of body armor with open floors. In FIG. 3 shows a rear view of the body armor.

 The bulletproof vest consists of a fabric cover 1, in which flexible layered protective bags of high-strength fabric 2 are installed, rigid armor plates 3 are installed in pockets 4. Each rigid armor plate contains a ceramic layer 5, mounted on a rigid non-fragile substrate 6. Outside on rigid armor plates 4 anti-rhinestone plates 7 made of ductile metal or as layered packages of high-strength fabric are installed. In the side seams of the cover 1 of the vest from the side of the chest, floors 8 with central fasteners 9 are inserted, covering pockets 2 with armor plates 3 and having pockets 10 for the fighter's equipment on the outside. The bulletproof vest has a cape 15, in which protective laminated elements 16 are made of high-strength fabric, protecting the neck and shoulders. The bulletproof vest has a belt transport loop 17 on the back, and in the lower part the bulletproof vest has an unloading belt 18. The bulletproof vest consists of a chest 19 and a back 20.

 Body armor works as follows.

A bullet with a steel hardened core hits a ceramic plate. The speed of the bullet is about 1000 m / s. The tompak shell collapses, the core hits a ceramic plate. The impact force is such that, as a rule, both the core and the ceramic plate are destroyed, but a complete penetration of the armor plate with the substrate will not occur if the core is destroyed in the initial period of penetration into the substrate. This condition is satisfied if the relation
L ₀ / C ₀ <L ₁ / C ₁ + L ₂ / V _n
where L ₀ is the length of the bullet core;
C ₀ - the propagation velocity of longitudinal waves in the core of the bullet;
C ₁ - the propagation velocity of longitudinal waves in the ceramic layer;
V _n - the speed of the bullet.

The condition for the specified ratio to be fulfilled indicates that the destruction time during compression of the bullet core L ₀ / C _{0 is} less than the total destruction time during compression of the ceramic layer L ₁ / C ₁ and the break-through time of the non-fragile substrate L ₂ / V _n .

 This condition suggests that even if the ceramic layer collapses, the core will still collapse in the very initial stage of contact with the substrate and the flight energy of the fragments will fall so much that it is not enough to destroy the substrate.

 To improve ease of use, the bulletproof vest has floors 8, having pockets 10, 11, 12, 13, 14 on the outside of the fighter’s equipment. Floors 8 in the open state give access to pockets 4, in which armor plates 3 are installed.

 To increase the protective properties by increasing the area of protection, the body armor has a cape 15, in which protective layered elements 16 of high-strength fabric 16 are installed, protecting the neck and shoulders.

 When transporting on a rope using a belt loop 17.

 To transfer part of the weight to the hips, the discharge belt 18 is tightened.

 As a result, the bulletproof vest of this design increases the protective properties when hitting bullets with a core of increased hardness, reduces the impact of the bullet, reduces the likelihood of bullets and armor fragments being damaged by ricochet, and improves ease of use.

Thus, the technical and economic advantage of the claimed design is compared with the prototype (see application of France N 2431674, MKI ⁴ F 41 H 5/04, 1/02, March 21, 1980) in improving the protective properties and improving ease of use.

Claims (5)

1. A bulletproof vest containing a fabric cover with flexible layered protective bags made of high-strength fabric and pockets placed on the cover with hard armor plates installed in them, characterized in that the armor plates are made with a ceramic layer mounted on a rigid non-fragile substrate, the thickness of the ceramic layer L ₁ and the thickness of the substrate L ₂ are in the ratio
L ₀ / C ₀ <L ₁ / C ₁ + L ₂ / V _p ,
where L ₀ is the length of the bullet core;
With ₀ - the propagation velocity of longitudinal waves in the core of the bullet;
With ₁ - the propagation velocity of longitudinal waves in the ceramic layer;
V _p - the speed of the bullet,
and on the outside, rigid armor plates are equipped with anti-ricket plates made of ductile metal or layered bags made of high-strength fabric.  2. The bulletproof vest according to claim 1, characterized in that it further comprises floors covering the pockets of the cover with armor plates, on the chest side, embedded in the side seams of the cover, with central fasteners and pockets for fighter's equipment placed on them.  3. The body armor according to claim 1, characterized in that it further comprises a cape with protective laminate elements installed in it from high strength fabric to protect the neck and shoulders.  4. Bulletproof vest according to claim 1, characterized in that it further comprises a belt transportation loop located on the back of the cover.  5. Body armor according to claim 1, characterized in that it further comprises an unloading belt located at the bottom of the cover.

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