Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
  • F41H5/00—Armour; Armour plates
  • F41H5/06—Shields
  • F41H5/12—Shields for smallarms; for light-rocket launchers
  • F41H5/14—Wheeled armoured shields
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
  • F41H5/00—Armour; Armour plates
  • F41H5/06—Shields
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F42—AMMUNITION; BLASTING
  • F42D—BLASTING
  • F42D5/00—Safety arrangements
  • F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless

Definitions

• the present invention relates to a method and shield structure against flying pieces, such as bullets, fragments, and other similar explosive or other bodies containing a large amount of impact energy, as well as shock waves, in order to stop them, or to reduce their impact force.
• the invention is based on a problem, which is caused by bullets, projectiles, shrapnel, fragments, or their ricochets, which should be stopped by an obstacle or structure suitable for the purpose, which can be erected and deployed rapidly.
• bullets, projectiles, or fragments have been stopped, and their impact force absorbed using sandbags, shields made from ballistic plates, or tent-like structures filled with a foam that attenuates explosions or impact force.
• sandbags shields made from ballistic plates, or tent-like structures filled with a foam that attenuates explosions or impact force.
• the invention is further based on a problem, in which a crowd, for example a crowd of demonstrators, should be separated from law enforcers and retained and isolated in a specific, restricted area.
• a crowd for example a crowd of demonstrators
• various riot barriers or obstacles made of metal or composite materials have been used, which can be erected, for example, with the aid a rapidly expanding foam or gel placed inside fabric.
• US patent publication 4 541 947 discloses a method for controlling a crowd or demonstration by using an barrier filled with the aid of a rapidly expanding foam.
• the inflation substances referred to are carbon or hydrogen fluoride surfactants, which are used to prevent fuel vaporizing in accidents.
• the expansion coefficient of such surfactants is stated to be 50:1 , or even 1000:1.
• a drawback of such gas-filled structures is that at least projectiles will ricochet from the surface of the structure when they strike it, in which case they will not dissipate in the actual shield structure, but may cause danger and damage to the surroundings.
• EP 323 763 B1 Another type of solution is disclosed in European patent publication EP 323 763 B1.
• This describes a shield structure, which consists of at least one polyamide-type (such as aramid) layer, which further consists of several polyamide plates, laminates, or membranes of differing thickness and density, each of which has a different modulus of elasticity.
• a drawback of such a structure is its size and the increase in weight due to the additional layers or laminates, which make the structure difficult to transport and to deploy very quickly.
• the invention is intended to eliminate the defects of the bullet-shield structures described above.
• the invention provides a transportable and rapidly inflatable and deployable protection against bodies, which also dissipate in the actual structure and do not ricochet into the surroundings.
• the invention is an easily transportable shield, which is massive when in operating condition, against fragments, shrapnel, bullets, projectiles or their ricochets, and pressure.
• the shield can be used to restrict routes.
• the shield can be easily deployed both indoors and outdoors.
• the shield can be utilized in many different dangerous situations.
• the basic idea of the shield is implemented in many different forms of the shield.
• the outer appearance of the shield can be freely selected, for example, in the form of various surface patterns.
• a gel mass acts as a flexible factor behind a ballistic plate, if such is used, which helps to reduce the energy of the projectile.
• the shield is deployed with the aid of water, which is available nearly everywhere.
• the shield can be brought to the location without attracting attention and is light when dry.
• the shield is manufactured from relatively easily obtainable materials.
• the invention combines the most important properties required in a protection structure, these being certain ballistic protection, massiveness, rapid and simple deployment, and adaptability to different danger situations.
• the combination of properties permits better protection than at present, for instance, in dangerous situations, in which both ballistic protection and a restriction of routes are required simultaneously.
• the shield solution according to the invention differs from the solutions described above, in that in its transportable state it is light and can be moved by one person, while in its operating state it is, however, extremely massive. In addition, it can be deployed quickly and easily. Solutions that are stated to be characteristic of the invention are described in the accompanying Claims.
• Figure 1 shows the shield structure in the operating position
• Figure 2 shows the shield structure seen from another direction, with the wall cut away
• Figure 3 shows the shield bags of the shield structure equipped with ballistic or shield plates
• Figure 4 shows the shield structure in the transportation state.
• the shield structure 1 there is a front wall 12 of the dry part and a front wall 7 of the wet part. In addition, there are openings in it, with shut-off valves 8 in them from filling and empting the compartments, as well as a handgrip 10, a base plate 10, and moving elements 11 for moving and transporting the shield structure.
• the dry part 14 is a part that provides additional safety in certain situations, and its not essential within the scope of the basic idea of the invention.
• the dry part 14 there is preferably a bag-like space or spaces 13 for the placing of the ballistic plates 5, as is shown by way of example in Figure 3.
• the wet part 15 of the shield structure consists of compartments 3, in each one of which there is a filling connection 16.
• a connection 2 such as a valve, coupling, or similar, preferably equipped with an operating element, for feeding a medium.
• absorbent material 4 is generally a material that begins to expand through the effect of a medium, particularly water, to form a gel.
• a medium particularly water
• a polymer product marketed by BASF AG, which the marketer terms a super-absorbent.
• BASF AG which the marketer terms a super-absorbent.
• Such a polymer substance can absorb up to 1000 times its weight of medium. At the same time, the retention of the medium is excellent. Together with the medium, the polymer form a solid gel, which can be returned to a liquid by a simple operation.
• the shield 1 is brought to the point of use by pulling it from the handgrip 9 attached to the base frame 10. Wheels 11 are also attached to the base frame 10, to facilitate movement.
• the shield 1 is set with the base frame against the ground and the front wall 12 facing the direction of the danger.
• the filling hose is attached to the connector 2 and the medium, especially water, is sprayed into the shield 1.
• the compartments 3 lying on top of each other are connected to each other by feed-throughs or filling connections 16.
• the shield 1 begins to fill one compartment 3 at a time, starting, in this case, from the lowest compartment 3.
• the water begins to be absorbed in the absorbent material 4 located in each compartment 3, the hydro-gel begins to form.
• the shield 1 starts to rise into its use position.
• the absorbent material is inside the compartments, in a form that reacts rapidly with the medium being fed into it. In practice, this means that it is mostly in a fine-particle form, such as a powder.
• ballistic plates 5 When ballistic plates 5 are being used, they rise along with the shield 1.
• the ballistic plates 5 are located in their own bag-like spaces 13, which are attached at their upper edges to the front wall 7 of the wet part 15 of the shield 1.
• the ballistic plates 5 with their bags 13 are located in their own separate space, in the dry part 14.
• the shield 1 is filled until water or hydro-gel comes out of the air-bleed valve 6, when the air-bleed valve 6 is closed.
• Any, as such known, structure, by means of which the desired shielding effect is achieved, can be used as the ballistic plates.
• plates can be of metal, bur more preferably of some lighter material, for example, a Kevlar- based plate.
• the shield structure is manufactured from appropriate material.
• the material is preferably flexible, to permit, for example, the entire structure to be folded up, as shown in Figure 4.
• the material should, however, be sufficiently strong to withstand the pressure of the mass inside it and the pressure of a shock wave acting on it, in addition to which it should be essentially watertight, because the medium, which is usually used in this case, is water.
• a strong fabric-like tight material is quite suitable for this purpose.
• the shield structure 1 is emptied by adding a salt solution through the air-bleed valve 6.
• the salt solution is allowed to act for a few minutes.
• the shield 1 is emptied one compartment 3 at a time.
• the upper compartment 3 is emptied first, by opening the screw plug 8 at its side. This is continued until the lowest compartment 3 has been emptied.
• the compartments 3 can be flushed, by opening the screw plugs 8 at both sides and spraying water through the compartment 3.
• the shield 1 should always be flushed into a sewer, and not straight into nature.
• the salt solution is suitable when using the aforementioned super absorbent made by BASF AG, in which sodium ions play a significant part in the formation of the gel. It is obvious that other gelling agents can also be used and the mechanisms for returning them to a solution state may be completely different.
• the shield structure according to the invention has been demonstrated to be excellent for the purpose described.
• the shield structure according to the invention will retain its shielding effect, even if a fragment penetrates the wall of the shield structure, as the gel inside the structure will not begin to flow out of a small, or even a slightly larger hole and empty the structure.
• the shock wave is able to move the shield structure to only a very limited extent.
• the shield structure is dismantled and put into the storage state by leading the mixture of absorbent and water out through a valve.
• the shield structure can also be implemented by combining the shield plate, an operating element equipped with a connection, and an absorbent, for example, to form a case-like structure in the manner according to Figure 4.
• the structure can be transported and moved easily.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
• Revetment (AREA)
• Air Bags (AREA)
• Buffer Packaging (AREA)
• Road Signs Or Road Markings (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=32104173

Family Applications (1)

Country Status (5)

Cited By (5)

Families Citing this family (3)

Citations (9)

Family Cites Families (10)

• 2004
  • 2004-04-14 FI FI20040526A patent/FI115796B/fi not_active IP Right Cessation
• 2005
  • 2005-02-17 US US10/546,647 patent/US20070151441A1/en not_active Abandoned
  • 2005-02-17 WO PCT/FI2005/000102 patent/WO2005100903A1/en not_active Application Discontinuation
  • 2005-02-17 AT AT05708182T patent/ATE512345T1/de active
  • 2005-02-17 EP EP05708182A patent/EP1766319B1/en not_active Not-in-force

Patent Citations (9)

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