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
  • F41H5/02—Plate construction
  • F41H5/04—Plate construction composed of more than one layer

Definitions

• the invetion concerns a bulletproof construction element, in a particular a metal opening filler, suitable in the construction industry.
• bulletproof elements known for use in the construction industry are based on materials which absorb the energy of the oncoming bullet. This energy is usually absorbed in such a way that there is no volume deformation of the bulletproof material. Usually these materials are special alloys.
• Existing bulletproof elements are composed of one or several layers of materials absorbing energy.
• a hollow space created in the construction profile, is filled with sufficiently strong material made of steel alloys.
• a massive belt made of special aluminium alloy, is integrated into the system or is fixed onto it.
• the bulletproof construction element suitable in particular as a metal opening filler for the construction industry, according to this invention.
• This element is based on the use of least two layers of different materials.
• the material used for the first layer on the side of the incoming bullet, which has the function of spreading the pressure caused by the impact of a bullet to a larger area, is harder than 25 HRC.
• the second layer having the hardness of 20 - 40% of the first layer, is formed of at least one panel thinner than the first layer. At least one panel of the second layer is made of another material which absorbs and/or accumulates energy of the impact mostly by a flexible deformation.
• the first layer can be made of a ferrite harder than 45 HRC.
• At least one more secondary layer softer than the material in the first layer and harder than the material second layer.
• At least one other material which has different characteristic of absorption and/or accumulation of impact energy than the materials used in panels of the second layer, is used.
• the first layer can be composed of several smaller segments.
• Panels in the second layer can be made of low-carbon steel or composed of layered materials form fiberglass or carbon-based materials.
• the bulletproof construction element made according to this invention is less expensive than existing available products.
• the bulletproof resistance can be increased by changing the thicknessof layers, panels and secondary layers, in classes Ml to M5 according to DIN 52290.
• Another advantage of this realization lies in its lower weight , and because of the use different materials, more compilicated shapes of construction elements can be produced.
• low-carbon steel, used for the second layer is not expensive, while its mechanical characteristics are saticfactory, both for its use ' as a bulletproof material, and its workability.
• Required characteristics can be reached by combination and changes in the number of secodary layers while conforming to eventual requirements for certain outside dimensions of the construction. In cases of uneven construction profiles, smaller segments can br. used in the first layer. Metal opening fillers made this way do not disturb the outside appearance.
• the bulletproof construction element will be described in more details on examples of a specific realization of an opening filler.
• Cross-section of the side view in Fig.l. shows one possible realization of this invention.
• Fig.2 and Fig.3 show cross-setion of the side view of other possible variation of the bulletproof element and Fig.3 show cross-setion of the side view of else other possible variation of the bulletproof element.
• the example of a bulletproof element for opening filler consists of first layer 1. and second layer 2, made of different materials.
• the first layer 1 material which is in the direction of the oncoming impact, has the hardness of 35 HRC, and is 7 mm thick.
• the second layer 2 has the hardness of 10 HRC, had consists of four panels 2., each 1.2 mm thick. These panels _ are made of low-carbon steel sheet metal.
• the first layer 1. causes enlargement of the area transmitting energy onto the second layer 2 -
• This second layer 2 acts as a spring which accumulates energy from an area several times larger than is the cross-section area of the bullet. This way, the energy of impact of the bullet on the second layer 2 of the bulletproof element is several times smaller.
• Another possible realization has a secondary layer 4 made of a material in the hardness of 20 HRC, inserted between the first 1. layer and second layer 2.
• This design of the construction element showed better bulletproof resistance according to DIN 52290 then the one in the previous example.
• Another possible realization has one insert 5_ made of layered fiberglass material between the panels 3_ and the second layer 2.
• first layer 1 and a second layer 2 which consist form only one profiled panel 3_.
• the first layer 1. of the bulletproof construction element is composed of several smaller segments. This type of design is suitable for example in using sintered carbides, natural materials and materials with similar characteristics. Besides the materials already mentioned, the first layer 1. can be made of steel alloys, ceramics, glass, special plastic, etc. Layer panels 3_ of the second layer 2 can be made of metal, layered material on the basis of carbon fibers, the combination thereof, etc.
• the bulletproof construction element of this technical design can be used particularly in the construction industry as an opening ' filler.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Applications Claiming Priority (7)

Publications (1)

Family

ID=27179647

Family Applications (1)

Country Status (4)

Family Cites Families (14)

• 1995
  • 1995-12-06 EP EP95936937A patent/EP0767892A1/de not_active Withdrawn
  • 1995-12-06 WO PCT/CZ1995/000029 patent/WO1996018078A1/en not_active Ceased
  • 1995-12-06 SK SK1025-96A patent/SK102596A3/sk unknown
  • 1995-12-06 AU AU39221/95A patent/AU3922195A/en not_active Abandoned

Non-Patent Citations (1)

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