Classifications

• • 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
  • F42D5/045—Detonation-wave absorbing or damping means
• • 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
  • F41H5/0442—Layered armour containing metal
  • F41H5/0457—Metal layers in combination with additional layers made of fibres, fabrics or plastics

Definitions

• the invention relates to a screening device for screening an explosive, such as a mine, comprising a case-like body which can be placed around the explosive, in such a manner that the parts produced when it explodes collide with the inner wall of the case-like body and are consequently prevented from spreading.
• a screening device of this kind is known. It comprises a case or cone of impregnated fibrous material. This known screening device offers a certain degree of protection against explosives which, for whatever reason, cannot be dismantled.
• the object of the invention is therefore to provide a screening device which causes fewer problems with regard to keeping it in a state of readiness.
• This object is achieved by the fact that the case-like body has an inner shell for counteracting fragmentation, and an outer shell for absorbing the energy released in the event of an explosion, which inner shell and outer shell fit separately inside one another.
• the case is not rigid, but rather the separate shells can be handled and stored more easily. In this case, these shells may be so flexible that they take up considerably less room during storage.
• the inner and outer shells may be designed in various ways.
• the inner shell comprises at least one plastic plate, which is held in a curved shape by the outer shell.
• the advantage of an embodiment of this kind is that in particular plates of this nature take up scarcely any room during storage. Nevertheless, they can quickly produce a curved inner shell which can be pressed under its own preloading against the outer shell.
• the outer shell comprises at least one flexible sleeve made from fibrous material.
• the bundle of fibres used in this case consists of fibres with a high energy-absorbing capacity, such as aramid, polyethylene, glass or nylon.
• the fibrous material is not provided with a matrix, which means that the sleeve can easily be folded flat. For this reason, the sleeves also take up scarcely any room during storage. In order to employ the plates, they can be moved into an open position, after which they are held firmly in the open position under the preloading of the plates.
• the number of sleeves accommodated inside one another can also be adapted to the threat posed by the explosive.
• the unit can be wrapped in a plastic sheet.
• an aluminium foil can be arranged on the inside of the sleeve, in order to increase the stability of a sleeve.
• Figure 1 shows the screening device according to the invention in the deployed state.
• FIG. 2 shows the separate components for screening devices of this kind.
• the screening device 1 depicted in Figure 1 is placed around a landmine 2, on the ground 3.
• This screening device comprises an outer shell 4 and an inner shell 5, which are held in a close-fitting manner one inside the other.
• the outer shell 4 comprises a number of sleeves 6 made from wound fibrous material, for example from aramid fibres, polyethylene fibres, etc.
• a layer of aluminium foil 8 is accommodated on the inside of the sleeves 6. Together with the sleeves 6, this layer of aluminium foil 8 is packaged inside a packaging sheet 9.
• the assembly comprising sleeves 6, aluminium foil 8 and packaging sheet 9 is flexible and can be folded flat, as illustrated in Figure 2.
• the aluminium foil 8 in particular provides the outer shell 4 with a sufficient rigidity to enable it to be placed in the open state without falling over.
• the inner shell 5 comprises a number of curved plates 10, which in the starting position have a flat form, as also illustrated in Figure 2. These plates may consist of a material which has good resistance to fragmentation, such as polycarbonate, acrylate and the like.
• plates 10 are sufficiently flexible to be able to be moved into a curved shape and then placed within the erected outer shell 1. In this position, one or more curved plates of this kind form the inner shell 5, as illustrated in Figure 1.

Landscapes

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

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19764712

Family Applications (1)

Country Status (3)

Cited By (8)

Citations (4)

• 1997
  • 1997-04-02 NL NL1005707A patent/NL1005707C2/nl not_active IP Right Cessation
• 1998
  • 1998-04-02 WO PCT/NL1998/000184 patent/WO1998044309A1/nl active Application Filing
  • 1998-04-02 AU AU67499/98A patent/AU6749998A/en not_active Abandoned

Patent Citations (4)

Also Published As

Similar Documents

Legal Events