CA2246785C - Bomb disposal unit - Google Patents
Bomb disposal unit Download PDFInfo
- Publication number
- CA2246785C CA2246785C CA002246785A CA2246785A CA2246785C CA 2246785 C CA2246785 C CA 2246785C CA 002246785 A CA002246785 A CA 002246785A CA 2246785 A CA2246785 A CA 2246785A CA 2246785 C CA2246785 C CA 2246785C
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- CA
- Canada
- Prior art keywords
- inner container
- disposal unit
- unit according
- bomb
- container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- 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
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- 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
- F41H11/00—Defence installations; Defence devices
- F41H11/12—Means for clearing land minefields; Systems specially adapted for detection of landmines
- F41H11/16—Self-propelled mine-clearing vehicles; Mine-clearing devices attachable to vehicles
- F41H11/28—Self-propelled mine-clearing vehicles; Mine-clearing devices attachable to vehicles using brushing or sweeping means or dozers to push mines lying on a surface aside; using means for removing mines intact from a surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
- F42B33/06—Dismantling fuzes, cartridges, projectiles, missiles, rockets or bombs
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- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Processing Of Solid Wastes (AREA)
- Tires In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A bomb disposal unit is disclosed comprising a resilient inner container, containment means, bomb support means for supporting an explosive charge within the inner container, a resilient base and a ballistic blanket. The inner container ras a peripheral wall with vent holes, a closed bottom and an open top. The preferred containment means is a plurality of stacked tubeless tires having a hole tied together with rope. The tires are placed on the resilient base. The inner container is placed within the hole of the stacked tires. A ballistic blanket is placed over the top of the inner container and is draped around the tires. Upon detonation, a portion of the blast escapes the inner container to the tires through the vent holes. Some of the portion of the blast escapes between the tires before they inflate. The remainder of the portion inflates the tires which help prevent the egress of fragmentation.
Description
Field of Invention The invention relates to the art of explosive disposal, and more particularly, to a container or unit in which an explosive charge or bomb may be detonated or transported for detonation, relatively safely.
Background of Invention With the ever increasing availability of manufactured bombs, information on how to make bombs and materials for making bombs, bombs are increasingly being used not only by terrc>rists and alleged freedom fighters but also by mentally ill people and other persons to cause destruction o.f property and/or loss of life.
The disposal of bombs is an inherently dangerous activity. If possible, discovered bombs such as letter bombs, are placed within, special enclosures, sometimes called bomb disposal devices or units, to reduce the risk of the bomb causing destruction of property and/or loss of life.
Depending on the size of the bomb, the bomb may be detonated within the bomb disposal unit or transported to another location for detonation.
However, many bomb disposal units are costly, heavy, bulky, difficult to transport, do not protect the floor upon which they rest and may even contribute to the destructive damage of a bomb detonation by falling apart or fragmenting.
U.S. Patent 4,543,872 (Graham et al.) granted on October 1, 1985 discloses a complex bomb disposal unit. A
collapsible/inflatable cylinder is placed over the bomb in a
Background of Invention With the ever increasing availability of manufactured bombs, information on how to make bombs and materials for making bombs, bombs are increasingly being used not only by terrc>rists and alleged freedom fighters but also by mentally ill people and other persons to cause destruction o.f property and/or loss of life.
The disposal of bombs is an inherently dangerous activity. If possible, discovered bombs such as letter bombs, are placed within, special enclosures, sometimes called bomb disposal devices or units, to reduce the risk of the bomb causing destruction of property and/or loss of life.
Depending on the size of the bomb, the bomb may be detonated within the bomb disposal unit or transported to another location for detonation.
However, many bomb disposal units are costly, heavy, bulky, difficult to transport, do not protect the floor upon which they rest and may even contribute to the destructive damage of a bomb detonation by falling apart or fragmenting.
U.S. Patent 4,543,872 (Graham et al.) granted on October 1, 1985 discloses a complex bomb disposal unit. A
collapsible/inflatable cylinder is placed over the bomb in a
2 deflated state. A compressed gas canister is used to inflate the cylinder. After inflation, a foam generating canister is used to automatically dispense foam into the cylinder surrounding the bomb. The foam and cylinder reduce the deleterious effects of a bomb explosion. This bomb disposal unit is complex to use, costly and it does not protect the floor upon which the bomb disposal unit rests.
U.S. Patent 3,739,732 (Tabor) granted on June 19, 1973 discloses a simple, low cost bomb disposal unit comprising a tubular body open at both ends and support means to support the bomb within the tubular body. The tubular body is made of a plurality of laminations of a resilient material.
Upon detonation the laminated tubular body tends to delaminate rather than the tubular body fragmenting or shattering.
However, upon detonation, the bomb disposal device not only directs the blast and accompanied fragmentation from the bomb upward but also downwards causing damage to the floor upon which the bomb disposal unit rests. Furthermore, since the bomb disposal unit uses only one container, fragmentation from a large detonated bomb will likely escape from the container causing damage tc property and/or loss of life.
U.S. Patent 3,820,479 (Fylling) granted on June 28, 1974 discloses a bomb disposal unit comprising an upright cylindrical container having a shell, a base and a cover and a cart upon which the upright cylindrical container is attached.
The shell and base is made of aluminium armour plate. The cover is pivotally connected to the container and is made in
U.S. Patent 3,739,732 (Tabor) granted on June 19, 1973 discloses a simple, low cost bomb disposal unit comprising a tubular body open at both ends and support means to support the bomb within the tubular body. The tubular body is made of a plurality of laminations of a resilient material.
Upon detonation the laminated tubular body tends to delaminate rather than the tubular body fragmenting or shattering.
However, upon detonation, the bomb disposal device not only directs the blast and accompanied fragmentation from the bomb upward but also downwards causing damage to the floor upon which the bomb disposal unit rests. Furthermore, since the bomb disposal unit uses only one container, fragmentation from a large detonated bomb will likely escape from the container causing damage tc property and/or loss of life.
U.S. Patent 3,820,479 (Fylling) granted on June 28, 1974 discloses a bomb disposal unit comprising an upright cylindrical container having a shell, a base and a cover and a cart upon which the upright cylindrical container is attached.
The shell and base is made of aluminium armour plate. The cover is pivotally connected to the container and is made in
3 the form of a ballistic grille to vent explosion gases in an upwardly direction. The cart has an elaborate wheel suspension system to prevent damage to the wheel suspension system during an explosion. The bomb disposal unit is costly, heavy and bulky.
Sumanarv of the Invention In accordance with the present invention, there is provided a bomb aisposal unit for facilitating disposal of an explosive charge by diminishing the deleterious effects of a blast with fragmentation. The bomb disposal unit comprises a resilient inner container having an open top, a closed bottom, a peripheral wall, and having sufficient strength to absorb thE' blast and the fragmentation without itself fragmenting appreciably. The peripheral wall has venting means. The bomb disposal unit further comprises outer containment means suz:rounding the cutside of the peripheral wall of the inner container. The cuter containment means has sufficient strength to absorb a portion of the blast and a portion of the fragmentation, if any, that escapes from the inner container to the outer containment means. After detonation of the explosive charge placed inside the inner container, the portion of the blast that escapes from the inner container to the outer containment means does so mainly through the venting means thereby removing blast energy from the inner container.
In one embodiment of the invention, the venting means is a plurality of vent holes and the outer containment means is a mesh surrounding the peripheral wall of the inner
Sumanarv of the Invention In accordance with the present invention, there is provided a bomb aisposal unit for facilitating disposal of an explosive charge by diminishing the deleterious effects of a blast with fragmentation. The bomb disposal unit comprises a resilient inner container having an open top, a closed bottom, a peripheral wall, and having sufficient strength to absorb thE' blast and the fragmentation without itself fragmenting appreciably. The peripheral wall has venting means. The bomb disposal unit further comprises outer containment means suz:rounding the cutside of the peripheral wall of the inner container. The cuter containment means has sufficient strength to absorb a portion of the blast and a portion of the fragmentation, if any, that escapes from the inner container to the outer containment means. After detonation of the explosive charge placed inside the inner container, the portion of the blast that escapes from the inner container to the outer containment means does so mainly through the venting means thereby removing blast energy from the inner container.
In one embodiment of the invention, the venting means is a plurality of vent holes and the outer containment means is a mesh surrounding the peripheral wall of the inner
4 container .
In another embodiment, the outer containment means is a resilient and inflatable outer container having inflation means facing the peripheral wall of the inner container. The outer container is in an uninflated state prior to detonation of the explosive charge. After detonation of the explosive charge, the portion of the blast that escapes from the inner container to the outer container does so mainly through the venting means and inflation means thereby inflating the outer container and removing blast energy from the inner container.
In another embodiment of the invention, the outer containment means is a resilient and inflatable outer container having inflation means facing the peripheral wall of the inner container and secondary venting means. The outer container is in an uninflated state prior to detonation of the explosive charge. After detonation of the explosive charge, the portion of the blast that escapes from the inner container to the outer container does so mainly through the venting means and inflation means and some of the portion of the blast escapes the outer container through the secondary venting means and the remainder of the portion of the blast inflates the outer container thereby removing blast energy from the inner container. The outer container may be simply a plurality of tubeless tires tied together with a plurality of rope .
Brief Description of the Drawings A detailed description of the preferred embodiment of the invention is provided below with reference to the following drawings in which:
FIGURE 1 is a perspective view of a bomb disposal unit in accordance with the preferred embodiment of the present invention;
FIGURE 2 is a side view of an inner container of the bomb disposal unit;
FIGURE 3 is a top view of the inner container shown in F:ic~. 2 but drawn to a larger scale;
FIGURE 4 is top perspective view of bomb support means of the bomb disposal unit;
FIGURE 5 is a perspective sectional view of the bomb disposal unit shown in Fig. 1 but drawn to a larger scale;
FIGURE 6 is a perspective view of outer containment means resting on a resilient base of the bomb disposal unit;
FIGURE 7 is a side view showing a robot placing the inner container of the bomb disposal unit within the outer containment means (which is surrounded by a cover) of the bomb disposal unit.
Detailed Description of the Preferred Embodiment Figures 1, 5 and 7 show a bomb disposal unit 10 comprising a resilient inner container 20, outer containment means 30, bomb support means 40, an optional resilient base 50, a outer cover 55, and a ballistic blanket 60.
Referring in particular to Figures 2, 3 and 5, the preferred shape cf the inner container 20 is an inverted truncated right circular cone with an open top 25, a pei:ipheral wall 70 and a closed bottom 80 attached to the cone at the truncation plane. The open top 25 is typically 14 inches in diameter. The closed bottom 80 is typically 10 inches in diameter. The peripheral wall 70 has four vent holes 90 located above the closed bottom 80 in the lower half of the inner container 20. The vent holes 90 are approximately three inches in diameter. Depending on the size of the inner container 20 more or less than four vent holes 90 are possible. The closed bottom 80 has a flat outer surface 100 and a concave like inner surface 110 with a focus inside the inner container 20 and below the vent holes 90. The inner container 20 has two handles 140 attached to the peripheral wall 70 near the open top 25.
The inner container 20 is typically formed of a plurality of laminations of a resilient material. The preferred resilient material is a high molecular density polymer or arimid material, such as Kevlar* or Spectra*, in conjunction with a urethane. The preferred number of laminations within the urethane is two but more could be used.
The preferred thickness of the peripheral wall 70 of the inner container 20 is 1 inch. The inner container 20 must have sufficient strength to absorb the blast and fragmentation from a detonation of an explosive charge (or a bomb) without itself fragmenting appreciably. Upon detonation, the urethane used in the laminated inner container 20 tends to fracture rather * Tz: ade -mark than fragment or shatter. The inner container 20 is held together by the high density polymer or arimid material, such as Kevlar* or Spectra*.
Referring to Figures 5 and 6, the outer containment means 30 comprises three stacked, inflatable, flexible, resilient and tubeless tires 120 tied together with a plurality of ropes 130. Each tubeless tire 120 has two sidewalls 125 and an opening 128 around the inner periphery of the tubeless tire 120. Since each tire has a hole in the middle, the stacked tubeless tires 120 have a hole 35. The tires 120 typically have multiple steel or Kevlar* ply belting. Each rcpe 130 is an arirnid or high molecular density polymer exhibiting a break strength in excess of 1200 lbs.
Depending on the explosive force of the bomb, rope with more or less strength can be used.
Referring to Figures 1 and 4, the bomb support means 40 comprises a circular cover 300 having an outer flap 310, a rectangular opening 320 in the middle of cover 300, and a pouch 330 underneath the opening 320 and attached to the cover 300. The pouch has a bottom 333. The outer cover 300 is made from PVC coated nylon.
The foam base 50 is typically made from high density closed cell foam. The preferred thickness of the foam is 2 inches (but foam with a thickness greater than 2 inches could be used) .
*Trade-mark Referring to Figures 1 and 5, the optional outer cover 55 typically has a drawstring (not shown) to secure the outer cover 55 on. the outer containment means 30. Figure 5 illustrates a sleeve 58 through which the drawstring passes.
The outer cover 55 also has a band or marking 400 to indicate the desired placement level of the bomb within the inner container 20. The band or marking 400 helps facilitate x-raying the explosive device placed within the bomb disposal unit 10. The outer cover 55 is simply made of plastic sheet.
Special ballistic materials are not needed.
Referring to Figure 5, the ballistic blanket 60 is typically made from either an arimid or high molecular density polymer woven fabric such as Spectra* or Kevlar*. The ballistic blanket 60 is typically 2 layers of woven ballistic material encased in a PVC coated nylon envelope. The size of the ballistic blanket 60 is typically 48 inches by 48 inches.
With the possible exception of the steel ply belting in the tires 120, the entire bomb disposal unit 10 is made from non-metallic components (or material) to reduce the de7_eterious effects of fragmentation that occur after detonation of an explosive charge placed inside the bomb disposal unit 10.
Referring to Figures 5 and 6, the outer cover 55 is placed around the outer container 30 and held in place with *Trade-mark the drawstring. The resilient base 50 is placed underneath the outer contair_ment means 30 (including the hole 35).
The cover 300 is placed over the top 25 of the inner container 20. The outer flap 310 surrounds a portion of the peripheral wall 70 near the open top 25. The bottom 333 of the pouch 330 is above the vent holes 90.
The bomb support means 40 shown in Figures 1 and 4 is designed mainly for letter bombs. Many letter bombs are typically enclosed within a package having six sides (e.g. a cuboid or rectangular parallelepiped). The letter bomb is placed within the pouch 330 through the opening 320 so that the sides of the letter bomb having the greatest surface area facie the peripheral wall 70 of the inner container 20. When the letter bomb is placed within the pouch 330 in such a manner, it is more likely that the majority of the blast and fragmentation will be directed toward the peripheral wall 70 of the inner container 20. The pouch 330 holds the letter bomb (or package) above the vent holes 90.
Referring to Figures 4 and 5, the handles 140 of the inner container 20 are used to place the inner container 20 in the hole 35 of the outer containment means 30 typically by hand. A package containing a suspected explosive charge is placed within the pouch 330 through the hole 320 of the cover 300. Then, the ballistic blanket 60 is placed over the hole 35 of the outer containment means 30 and the open top 25 of the inner container 20 and draped over a portion (typically 50~) of the outer containment means 30 and the outer cover 55.
ThE'. ballistic blanket 60 is not attached in any way to the re:~t of the bomb disposal unit 10. Otherwise, an explosion from the suspected explosive charge may lift the bomb disposal unit 10 off the ground.
The bomb disposal unit 10 is x-rayed to help determine whether the package contains an explosive charge.
If the x-ray confirms the presence of an explosive charge or is indeterminate and the explosive charge is not too dangerous, the bcmb disposal unit 10 is moved to a safe 10 location (unless the bomb disposal unit 10 is already at a safe location) and is either diffused or detonated at the safe location. The bcmb disposal unit 10 is typically moved by lifting the bomb disposal unit 10 by hand or with the aid of a dolly placed underneath the bomb disposal unit 10. If the explosive charge is too dangerous, personnel (other than the personnel attending to the explosive charge) are evacuated from the area to a safe location and the explosive charge is typically either diffused or detonated on site.
(Alternatively, a remote controlled robot can be used to move the bomb disposal unit 10 to a safe location).
If the explosive charge explodes pre-maturely within the bomb disposal unit 10 or is detonated within the bomb disposal unit 10, the bomb disposal unit works the following way: Gases from the explosive charge (i.e. the blast) precede fragmentation frcm the explosive charge. A portion of the blast escapes frcm the inner container 20 into the outer containment means 30 mainly through the vent holes 90. Some of the portion of the blast escapes between the tires 120 before they inflate. Since some of the blast escape the bomb disposal unit 10, blast energy is removed from the bomb di:~posal unit 10 making it easier to contain the fragmentation. The remainder of the portion of the blast that escapes into the outer containment means 30 inflates the tires 120 and removes blast energy from the inner container 20. In addition, the side walls 125 of the tires 120 expand against themselves forming a seal between the sidewalls 125 of each adjacent pair of tires 120 to help prevent any egress of any fragmentation which manage to escape from the inner container into the outer containment means 30. The size and number of the vent holes 90 of the inner container 20 must be sufficient to allow the remainder of the portion of the blast to escape into the tubeless tires 120 and inflate the tubeless tares 120. The hoop tension of the tires 120 helps contain the blast energy.
In addition, the shape of the inner container 20 helps direct the blast and fragmentation upward towards the 20 open top 25 of the inner container 20. The hoop tension of the inner container helps contain blast energy directed toward the peripheral wall 70 of the inner container 20. The ballistic blanket 60 causes a reduction in the energy of the fragmentation that exits through the open top 25 of the inner container 20. The resilient base 50 upon which the inner container 20 and the outer containment means 30 rest helps deaden any impulse from the detonated explosive charge that might cause the bomb disposal unit 10 to move after det;onat ion .
Referring to Figure 7, typically, a remote controlled robot 150 and a deactivation/detonation device, such as a water cannon (not shown), are used to deactivate (:i.e. destroy) or detonate the explosive charge. The robot 150 removes the inner container 20 from the outer containment means 30 and moves the inner container 20 away from the rest of the bomb disposal unit 10. The water cannon is used to shoot water at the inner container 20 destroying the explosive charge (or sometimes detonating the explosive charge). In addition, the water severely damages or destroys the inner container 20.
The robot 150 typically comprises a cart 160 with wheels 170, a motor 175, steering means (not shown), a mast 180 with an end 185, a boom 190, a camera 200, a first hydraulic mechanism 200, a second hydraulic mechanism 210 and radio control means 220. The motor 175 is attached to the cart 160 and connected to the wheels 170. The steering means (not shown) is also attached to the cart 160 and connected to the wheels 170. The mast 180 is pivotally connected to the cart 160. The boom 190 is pivotally connected to the mast 180. The camera 200 is attached to the boom 190. The first hydraulic mechanism 200 is attached to the cart 160 and to the mart 180 and controls the position of the mast 180 relative to the cart 160. The second hydraulic control mechanism 210 is attached to the mast 180 and to the boom 190 and controls the po:~ition of the boom 190 relative to the mast 180. The radio control means is attached to the cart 160 and connected to the camera 200 via cable 230, to the first hydraulic mechanism 200, to the second hydraulic mechanism 210, to the steering means and to the motor 175.
With a radio remote control unit (not shown), an operator is able to control the robot 150. In particular, an operator is able to control the motor 175, the steering means, the first hydraulic control means 200 and the second hydraulic control means 210 from a distance with relative safety.
Images from the camera 200 are transmitted by the radio control means 220 to the radio remote control unit to aid the operator in controlling the robot 150.
By using the remote control unit, the operator moves robot 150 so that the end 185 of the boom 180 passes through the handles 140 cf the inner container 20. The operator activates the first hydraulic mechanism 200 and the second hydraulic mechanism 210 to lift the inner container 20 from the outer containment means 30. The operator moves the robot 150 to a safe distance away from the outer containment means 30. The operatcr activates the first hydraulic mechanism 200 and the second hydraulic mechanism 210 to lower the inner container 20 to the ground. The operator then moves the robot 150 away from the inner container 20 in such a manner that the boom 180 no longer contacts the handles 140. The operator then moves the rcbot 150 to a safe distance away from the inner container 20 before the explosive charge is destroyed or detonated with a deactivation/detonation device. Typically, a wager cannon (not shown) is used as the deactivation/detonation device. The water cannon is used to shoot water at the inner container 20 destroying the explosive charge (or sometimes detonating the explosive charge). In addition, the water severely damages or destroys the inner container 20. Alternatively, another explosive charge is used as the deactivation/detonation device. The other explosive charge is placed within the inner container 20 and is detonated with a remote control or a timer causing the destruction or detonation of the explosive charge.
Alternatively, the inner container 20 is not removed from the outer containment means. The explosive charge within the bomb disposal unit 10 is deactivated or detonated with a deactivation/detonation device such as another explosive charge placed within the bomb disposal unit 10. The other explosive charge is detonated with a remote control or a timer causing the destruction or detonation of the explosive charge.
Variations of the inner container 20 are possible.
Foi: example, a grille or a mesh (not shown) may be placed over the vent holes 90 (e.g. each vent hole 90) and attached to the inner container 20 to help prevent the egress of fragmentation from the inner container 20 into the outer containment means 30.. The grille cr mesh may be placed within laminations of the: resilient material used for the inner container 20. Other shapes for the inner container 20 may be used such as body with a peripheral wall, a flared open top and a closed bottom, a t:ubular body with a flared open top and a closed bottom or a right circular cylinder with an open top and a closed bottom.
The concave like inner surface 100 may be parabolic in shape wit:h foci. Although not ideal, the focus or foci of the concave like inner surface may be at or above the vent holes 90.. The inner container may have only one handle 140 or more than two handles 140.
Variations of the outer containment means 30 are possible. For example, the outer containment means 30 may be 10 simply a mesh surrounding the peripheral wall 70 of the inner container 20. The mesh is typically a Kevlar* or Spectra*
mesh. After detonation of the explosive charge, the portion of the blast that escapes from the inner container 20 to the outer containment means 30 does so mainly through the vent holes 90 thereby removing blast energy from the inner container 20. The mesh helps contain any fragmentation within the inner container 20.
Alternatively, the outer containment means 30 may be simply a resilient, inflatable outer container with inflation means facing the peripheral wall 70 of the inner container 20.
Prior to detonation, the outer container is in an uninflated state. After detonation, the portion of the blast that escapes from the inner container 20 to the outer container does so mainly through the vent holes 90 and the inflation means thereby inflating the outer container and removing blast *Trade-mark energy from the inner container 20. The outer container may be simply a tubeless tire with two sidewalk and an opening around the inner periphery of the tire. Preferably, the tire has multiple Kevlar* or steel ply belting. The inflation means is the opening of the tubeless tire.
Alternatively, the outer containment means 30 may be a resilient, inflatable outer container having inflation means facing the peripheral wall 70 of the inner container 20 and secondary venting means. Prior to detonation, the outer container is in an uninflated state. After detonation, the portion of the blast that escapes from the inner container 20 to the outer container does so mainly through the vent holes 90 and the inflation means. Some of the portion of the blast escapes the outer container through the secondary venting means thereby removing blast energy from the bomb disposal unit 10. The remainder of the portion of the blast inflates the outer container thereby removing blast energy from the inner container 20. The secondary venting means are typically provided by a secondary vent hole or a plurality of secondary vent holes on the outer container. Preferably, a grille or a mesh is placed over the secondary vent holes and attached to the outer container to help prevent the egress of fragmentation from the auter container. (E.g. Kevlar* or Spectra* mesh). Alternatively, secondary venting means can be *Trade-mark provided through the use of pressure valves attached to the out:er container.
For example, the outer container may be simply a large tubeless tire with two sidewalls and an opening around the inner periphery of the tire. Preferably, the tire has multiple Kevlar* or steel ply belting. The inflation means is the opening of the tubeless tire. The secondary venting means are typically a plurality of secondary vent holes on the tire.
Preferably, the secondary vent holes are on the top sidewall.
In addition, a grill or a mesh may be placed over the secondary vent hcles to help contain any fragmentation.
Alternatively, pressure valves may be used on the tire.
Various types of bomb support means 40 can be employed depending on the type of explosive charge or bomb.
For example, the bomb support means 40 may be in the form of a net: or curtain suspended within the inner container 20.
Although not ideal, the bomb support means 40 may support the explcsive charge at or below the vent holes 90.
Depending on the shape of the inner container 20, thE: cover 300 may have a different shape in order that the cover can properly rest on top of the inner container 20.
Other variations of the bomb disposal unit 10 are possible. For example, it is not necessary that the resilient base 50 be used. In addition, it is also not necessary that the ballistic blanket 60 be used. And finally, it is also not necessary that the cover 55 be used.
All such variations are believed to be within the sphere and scope of the invention.
In another embodiment, the outer containment means is a resilient and inflatable outer container having inflation means facing the peripheral wall of the inner container. The outer container is in an uninflated state prior to detonation of the explosive charge. After detonation of the explosive charge, the portion of the blast that escapes from the inner container to the outer container does so mainly through the venting means and inflation means thereby inflating the outer container and removing blast energy from the inner container.
In another embodiment of the invention, the outer containment means is a resilient and inflatable outer container having inflation means facing the peripheral wall of the inner container and secondary venting means. The outer container is in an uninflated state prior to detonation of the explosive charge. After detonation of the explosive charge, the portion of the blast that escapes from the inner container to the outer container does so mainly through the venting means and inflation means and some of the portion of the blast escapes the outer container through the secondary venting means and the remainder of the portion of the blast inflates the outer container thereby removing blast energy from the inner container. The outer container may be simply a plurality of tubeless tires tied together with a plurality of rope .
Brief Description of the Drawings A detailed description of the preferred embodiment of the invention is provided below with reference to the following drawings in which:
FIGURE 1 is a perspective view of a bomb disposal unit in accordance with the preferred embodiment of the present invention;
FIGURE 2 is a side view of an inner container of the bomb disposal unit;
FIGURE 3 is a top view of the inner container shown in F:ic~. 2 but drawn to a larger scale;
FIGURE 4 is top perspective view of bomb support means of the bomb disposal unit;
FIGURE 5 is a perspective sectional view of the bomb disposal unit shown in Fig. 1 but drawn to a larger scale;
FIGURE 6 is a perspective view of outer containment means resting on a resilient base of the bomb disposal unit;
FIGURE 7 is a side view showing a robot placing the inner container of the bomb disposal unit within the outer containment means (which is surrounded by a cover) of the bomb disposal unit.
Detailed Description of the Preferred Embodiment Figures 1, 5 and 7 show a bomb disposal unit 10 comprising a resilient inner container 20, outer containment means 30, bomb support means 40, an optional resilient base 50, a outer cover 55, and a ballistic blanket 60.
Referring in particular to Figures 2, 3 and 5, the preferred shape cf the inner container 20 is an inverted truncated right circular cone with an open top 25, a pei:ipheral wall 70 and a closed bottom 80 attached to the cone at the truncation plane. The open top 25 is typically 14 inches in diameter. The closed bottom 80 is typically 10 inches in diameter. The peripheral wall 70 has four vent holes 90 located above the closed bottom 80 in the lower half of the inner container 20. The vent holes 90 are approximately three inches in diameter. Depending on the size of the inner container 20 more or less than four vent holes 90 are possible. The closed bottom 80 has a flat outer surface 100 and a concave like inner surface 110 with a focus inside the inner container 20 and below the vent holes 90. The inner container 20 has two handles 140 attached to the peripheral wall 70 near the open top 25.
The inner container 20 is typically formed of a plurality of laminations of a resilient material. The preferred resilient material is a high molecular density polymer or arimid material, such as Kevlar* or Spectra*, in conjunction with a urethane. The preferred number of laminations within the urethane is two but more could be used.
The preferred thickness of the peripheral wall 70 of the inner container 20 is 1 inch. The inner container 20 must have sufficient strength to absorb the blast and fragmentation from a detonation of an explosive charge (or a bomb) without itself fragmenting appreciably. Upon detonation, the urethane used in the laminated inner container 20 tends to fracture rather * Tz: ade -mark than fragment or shatter. The inner container 20 is held together by the high density polymer or arimid material, such as Kevlar* or Spectra*.
Referring to Figures 5 and 6, the outer containment means 30 comprises three stacked, inflatable, flexible, resilient and tubeless tires 120 tied together with a plurality of ropes 130. Each tubeless tire 120 has two sidewalls 125 and an opening 128 around the inner periphery of the tubeless tire 120. Since each tire has a hole in the middle, the stacked tubeless tires 120 have a hole 35. The tires 120 typically have multiple steel or Kevlar* ply belting. Each rcpe 130 is an arirnid or high molecular density polymer exhibiting a break strength in excess of 1200 lbs.
Depending on the explosive force of the bomb, rope with more or less strength can be used.
Referring to Figures 1 and 4, the bomb support means 40 comprises a circular cover 300 having an outer flap 310, a rectangular opening 320 in the middle of cover 300, and a pouch 330 underneath the opening 320 and attached to the cover 300. The pouch has a bottom 333. The outer cover 300 is made from PVC coated nylon.
The foam base 50 is typically made from high density closed cell foam. The preferred thickness of the foam is 2 inches (but foam with a thickness greater than 2 inches could be used) .
*Trade-mark Referring to Figures 1 and 5, the optional outer cover 55 typically has a drawstring (not shown) to secure the outer cover 55 on. the outer containment means 30. Figure 5 illustrates a sleeve 58 through which the drawstring passes.
The outer cover 55 also has a band or marking 400 to indicate the desired placement level of the bomb within the inner container 20. The band or marking 400 helps facilitate x-raying the explosive device placed within the bomb disposal unit 10. The outer cover 55 is simply made of plastic sheet.
Special ballistic materials are not needed.
Referring to Figure 5, the ballistic blanket 60 is typically made from either an arimid or high molecular density polymer woven fabric such as Spectra* or Kevlar*. The ballistic blanket 60 is typically 2 layers of woven ballistic material encased in a PVC coated nylon envelope. The size of the ballistic blanket 60 is typically 48 inches by 48 inches.
With the possible exception of the steel ply belting in the tires 120, the entire bomb disposal unit 10 is made from non-metallic components (or material) to reduce the de7_eterious effects of fragmentation that occur after detonation of an explosive charge placed inside the bomb disposal unit 10.
Referring to Figures 5 and 6, the outer cover 55 is placed around the outer container 30 and held in place with *Trade-mark the drawstring. The resilient base 50 is placed underneath the outer contair_ment means 30 (including the hole 35).
The cover 300 is placed over the top 25 of the inner container 20. The outer flap 310 surrounds a portion of the peripheral wall 70 near the open top 25. The bottom 333 of the pouch 330 is above the vent holes 90.
The bomb support means 40 shown in Figures 1 and 4 is designed mainly for letter bombs. Many letter bombs are typically enclosed within a package having six sides (e.g. a cuboid or rectangular parallelepiped). The letter bomb is placed within the pouch 330 through the opening 320 so that the sides of the letter bomb having the greatest surface area facie the peripheral wall 70 of the inner container 20. When the letter bomb is placed within the pouch 330 in such a manner, it is more likely that the majority of the blast and fragmentation will be directed toward the peripheral wall 70 of the inner container 20. The pouch 330 holds the letter bomb (or package) above the vent holes 90.
Referring to Figures 4 and 5, the handles 140 of the inner container 20 are used to place the inner container 20 in the hole 35 of the outer containment means 30 typically by hand. A package containing a suspected explosive charge is placed within the pouch 330 through the hole 320 of the cover 300. Then, the ballistic blanket 60 is placed over the hole 35 of the outer containment means 30 and the open top 25 of the inner container 20 and draped over a portion (typically 50~) of the outer containment means 30 and the outer cover 55.
ThE'. ballistic blanket 60 is not attached in any way to the re:~t of the bomb disposal unit 10. Otherwise, an explosion from the suspected explosive charge may lift the bomb disposal unit 10 off the ground.
The bomb disposal unit 10 is x-rayed to help determine whether the package contains an explosive charge.
If the x-ray confirms the presence of an explosive charge or is indeterminate and the explosive charge is not too dangerous, the bcmb disposal unit 10 is moved to a safe 10 location (unless the bomb disposal unit 10 is already at a safe location) and is either diffused or detonated at the safe location. The bcmb disposal unit 10 is typically moved by lifting the bomb disposal unit 10 by hand or with the aid of a dolly placed underneath the bomb disposal unit 10. If the explosive charge is too dangerous, personnel (other than the personnel attending to the explosive charge) are evacuated from the area to a safe location and the explosive charge is typically either diffused or detonated on site.
(Alternatively, a remote controlled robot can be used to move the bomb disposal unit 10 to a safe location).
If the explosive charge explodes pre-maturely within the bomb disposal unit 10 or is detonated within the bomb disposal unit 10, the bomb disposal unit works the following way: Gases from the explosive charge (i.e. the blast) precede fragmentation frcm the explosive charge. A portion of the blast escapes frcm the inner container 20 into the outer containment means 30 mainly through the vent holes 90. Some of the portion of the blast escapes between the tires 120 before they inflate. Since some of the blast escape the bomb disposal unit 10, blast energy is removed from the bomb di:~posal unit 10 making it easier to contain the fragmentation. The remainder of the portion of the blast that escapes into the outer containment means 30 inflates the tires 120 and removes blast energy from the inner container 20. In addition, the side walls 125 of the tires 120 expand against themselves forming a seal between the sidewalls 125 of each adjacent pair of tires 120 to help prevent any egress of any fragmentation which manage to escape from the inner container into the outer containment means 30. The size and number of the vent holes 90 of the inner container 20 must be sufficient to allow the remainder of the portion of the blast to escape into the tubeless tires 120 and inflate the tubeless tares 120. The hoop tension of the tires 120 helps contain the blast energy.
In addition, the shape of the inner container 20 helps direct the blast and fragmentation upward towards the 20 open top 25 of the inner container 20. The hoop tension of the inner container helps contain blast energy directed toward the peripheral wall 70 of the inner container 20. The ballistic blanket 60 causes a reduction in the energy of the fragmentation that exits through the open top 25 of the inner container 20. The resilient base 50 upon which the inner container 20 and the outer containment means 30 rest helps deaden any impulse from the detonated explosive charge that might cause the bomb disposal unit 10 to move after det;onat ion .
Referring to Figure 7, typically, a remote controlled robot 150 and a deactivation/detonation device, such as a water cannon (not shown), are used to deactivate (:i.e. destroy) or detonate the explosive charge. The robot 150 removes the inner container 20 from the outer containment means 30 and moves the inner container 20 away from the rest of the bomb disposal unit 10. The water cannon is used to shoot water at the inner container 20 destroying the explosive charge (or sometimes detonating the explosive charge). In addition, the water severely damages or destroys the inner container 20.
The robot 150 typically comprises a cart 160 with wheels 170, a motor 175, steering means (not shown), a mast 180 with an end 185, a boom 190, a camera 200, a first hydraulic mechanism 200, a second hydraulic mechanism 210 and radio control means 220. The motor 175 is attached to the cart 160 and connected to the wheels 170. The steering means (not shown) is also attached to the cart 160 and connected to the wheels 170. The mast 180 is pivotally connected to the cart 160. The boom 190 is pivotally connected to the mast 180. The camera 200 is attached to the boom 190. The first hydraulic mechanism 200 is attached to the cart 160 and to the mart 180 and controls the position of the mast 180 relative to the cart 160. The second hydraulic control mechanism 210 is attached to the mast 180 and to the boom 190 and controls the po:~ition of the boom 190 relative to the mast 180. The radio control means is attached to the cart 160 and connected to the camera 200 via cable 230, to the first hydraulic mechanism 200, to the second hydraulic mechanism 210, to the steering means and to the motor 175.
With a radio remote control unit (not shown), an operator is able to control the robot 150. In particular, an operator is able to control the motor 175, the steering means, the first hydraulic control means 200 and the second hydraulic control means 210 from a distance with relative safety.
Images from the camera 200 are transmitted by the radio control means 220 to the radio remote control unit to aid the operator in controlling the robot 150.
By using the remote control unit, the operator moves robot 150 so that the end 185 of the boom 180 passes through the handles 140 cf the inner container 20. The operator activates the first hydraulic mechanism 200 and the second hydraulic mechanism 210 to lift the inner container 20 from the outer containment means 30. The operator moves the robot 150 to a safe distance away from the outer containment means 30. The operatcr activates the first hydraulic mechanism 200 and the second hydraulic mechanism 210 to lower the inner container 20 to the ground. The operator then moves the robot 150 away from the inner container 20 in such a manner that the boom 180 no longer contacts the handles 140. The operator then moves the rcbot 150 to a safe distance away from the inner container 20 before the explosive charge is destroyed or detonated with a deactivation/detonation device. Typically, a wager cannon (not shown) is used as the deactivation/detonation device. The water cannon is used to shoot water at the inner container 20 destroying the explosive charge (or sometimes detonating the explosive charge). In addition, the water severely damages or destroys the inner container 20. Alternatively, another explosive charge is used as the deactivation/detonation device. The other explosive charge is placed within the inner container 20 and is detonated with a remote control or a timer causing the destruction or detonation of the explosive charge.
Alternatively, the inner container 20 is not removed from the outer containment means. The explosive charge within the bomb disposal unit 10 is deactivated or detonated with a deactivation/detonation device such as another explosive charge placed within the bomb disposal unit 10. The other explosive charge is detonated with a remote control or a timer causing the destruction or detonation of the explosive charge.
Variations of the inner container 20 are possible.
Foi: example, a grille or a mesh (not shown) may be placed over the vent holes 90 (e.g. each vent hole 90) and attached to the inner container 20 to help prevent the egress of fragmentation from the inner container 20 into the outer containment means 30.. The grille cr mesh may be placed within laminations of the: resilient material used for the inner container 20. Other shapes for the inner container 20 may be used such as body with a peripheral wall, a flared open top and a closed bottom, a t:ubular body with a flared open top and a closed bottom or a right circular cylinder with an open top and a closed bottom.
The concave like inner surface 100 may be parabolic in shape wit:h foci. Although not ideal, the focus or foci of the concave like inner surface may be at or above the vent holes 90.. The inner container may have only one handle 140 or more than two handles 140.
Variations of the outer containment means 30 are possible. For example, the outer containment means 30 may be 10 simply a mesh surrounding the peripheral wall 70 of the inner container 20. The mesh is typically a Kevlar* or Spectra*
mesh. After detonation of the explosive charge, the portion of the blast that escapes from the inner container 20 to the outer containment means 30 does so mainly through the vent holes 90 thereby removing blast energy from the inner container 20. The mesh helps contain any fragmentation within the inner container 20.
Alternatively, the outer containment means 30 may be simply a resilient, inflatable outer container with inflation means facing the peripheral wall 70 of the inner container 20.
Prior to detonation, the outer container is in an uninflated state. After detonation, the portion of the blast that escapes from the inner container 20 to the outer container does so mainly through the vent holes 90 and the inflation means thereby inflating the outer container and removing blast *Trade-mark energy from the inner container 20. The outer container may be simply a tubeless tire with two sidewalk and an opening around the inner periphery of the tire. Preferably, the tire has multiple Kevlar* or steel ply belting. The inflation means is the opening of the tubeless tire.
Alternatively, the outer containment means 30 may be a resilient, inflatable outer container having inflation means facing the peripheral wall 70 of the inner container 20 and secondary venting means. Prior to detonation, the outer container is in an uninflated state. After detonation, the portion of the blast that escapes from the inner container 20 to the outer container does so mainly through the vent holes 90 and the inflation means. Some of the portion of the blast escapes the outer container through the secondary venting means thereby removing blast energy from the bomb disposal unit 10. The remainder of the portion of the blast inflates the outer container thereby removing blast energy from the inner container 20. The secondary venting means are typically provided by a secondary vent hole or a plurality of secondary vent holes on the outer container. Preferably, a grille or a mesh is placed over the secondary vent holes and attached to the outer container to help prevent the egress of fragmentation from the auter container. (E.g. Kevlar* or Spectra* mesh). Alternatively, secondary venting means can be *Trade-mark provided through the use of pressure valves attached to the out:er container.
For example, the outer container may be simply a large tubeless tire with two sidewalls and an opening around the inner periphery of the tire. Preferably, the tire has multiple Kevlar* or steel ply belting. The inflation means is the opening of the tubeless tire. The secondary venting means are typically a plurality of secondary vent holes on the tire.
Preferably, the secondary vent holes are on the top sidewall.
In addition, a grill or a mesh may be placed over the secondary vent hcles to help contain any fragmentation.
Alternatively, pressure valves may be used on the tire.
Various types of bomb support means 40 can be employed depending on the type of explosive charge or bomb.
For example, the bomb support means 40 may be in the form of a net: or curtain suspended within the inner container 20.
Although not ideal, the bomb support means 40 may support the explcsive charge at or below the vent holes 90.
Depending on the shape of the inner container 20, thE: cover 300 may have a different shape in order that the cover can properly rest on top of the inner container 20.
Other variations of the bomb disposal unit 10 are possible. For example, it is not necessary that the resilient base 50 be used. In addition, it is also not necessary that the ballistic blanket 60 be used. And finally, it is also not necessary that the cover 55 be used.
All such variations are believed to be within the sphere and scope of the invention.
Claims (35)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A bomb disposal unit for facilitating disposal of an explosive charge by diminishing the deleterious effects of a blast with fragmentation, said bomb disposal unit comprising:
a resilient inner container having an open top, a closed bottom, a peripheral wall, and having sufficient strength to absorb the blast and the fragmentation without itself fragmenting appreciably; the peripheral wall having venting means; and outer containment means surrounding the outside of the peripheral wall of the inner container; said outer containment means having sufficient strength to absorb a portion of the blast and a portion of the fragmentation, if any, that escapes from the inner container to the outer containment means;
whereby after detonation of the explosive charge placed inside the inner container, the portion of the blast that escapes from the inner container to the outer containment means does so mainly through the venting means thereby removing blast energy from the inner container.
a resilient inner container having an open top, a closed bottom, a peripheral wall, and having sufficient strength to absorb the blast and the fragmentation without itself fragmenting appreciably; the peripheral wall having venting means; and outer containment means surrounding the outside of the peripheral wall of the inner container; said outer containment means having sufficient strength to absorb a portion of the blast and a portion of the fragmentation, if any, that escapes from the inner container to the outer containment means;
whereby after detonation of the explosive charge placed inside the inner container, the portion of the blast that escapes from the inner container to the outer containment means does so mainly through the venting means thereby removing blast energy from the inner container.
2. A bomb disposal unit according to claim 1 wherein the closed bottom has a concave like inner surface to help direct the blast and fragmentation toward the open top.
3. A bomb disposal unit according to claim 1 or 2 wherein the cross sectional area of the inner container is uniform from the closed bottom to the top or increases from the closed bottom to the top.
4. A bomb disposal unit according to claim 1, 2 or 3 further comprising bomb support means coupled with the inner container for supporting the explosive charge within the inner container.
5. A bomb disposal unit according to claim 1, 2, 3 or 4 further comprising a resilient base placed under the inner container and the outer containment means.
6. A bomb disposal unit according to claim 1, 2, 3, 4 or 5 further comprising a ballistic blanket to be placed over the top of the inner container.
7. A bomb disposal unit according to claim 1, 2, 3, 4 or 6 wherein the bomb support means supports the explosive charge above the venting means but below the open top and completely out of intimate contact with the peripheral wall of the inner container.
8. A bomb disposal unit according to claim 1, 2, 3, 4, 5, 6 or 7 wherein the venting means comprise a plurality of vent holes.
9. A bomb disposal unit according to claim 1, 2, 3, 4, 5, 6, 7 or 8 wherein the outer containment means comprises a mesh.
10. A bomb disposal unit according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9 wherein the inner container is formed of a plurality of laminations of resilient material.
11. A bomb disposal unit according to claim 1 wherein the outer containment means is a resilient and inflatable outer container having inflation means facing the peripheral wall of the inner container; said outer container is an uninflated state prior to detonation of the explosive charge and whereby after detonation of the explosive charge, the portion of the blast that escapes from the inner container to the outer container does so mainly through the venting means and inflation means thereby inflating the outer container and removing blast energy from the inner container.
12. A bomb disposal unit according to claim 11 wherein the closed bottom has a concave like inner surface to help direct the blast and fragmentation toward the open top.
1:3. A bomb disposal unit according to claim 11 or 12 wherein the cross sectional area of the inner container is uniform from the closed bottom to the top or increases from the closed bottom to the top.
14. A bomb disposal unit according to claim 11, 12 or 13 further comprising bomb support means coupled with the inner container for supporting the explosive charge within the inner container.
15. A bomb disposal unit according to claim 11, 12, 13 or 14 further comprising a resilient base placed under the inner container and the outer container.
16. A bomb disposal unit according to claim 11, 12, 13, 14 or 15 further comprising a ballistic blanket to be placed over the open top of the inner container.
17. A bomb disposal unit according to claim 11, 12, 13, 14, 15 or 16 wherein the bomb support means supports the explosive charge above the venting means but below the open top and completely out of intimate contact with the peripheral wall of the inner container.
18. A bomb disposal unit according to claim 11, 12, 13, 14, 15, 16 or 17 wherein the venting means comprise a plurality of vent holes.
19. A bomb disposal unit according to claim 18 further comprising a mesh attached to the inner container and covering the vent holes to help prevent the egress of the fragmentation.
20. A bomb disposal unit according to claim 11, 12, 13, 14, 15, 16, 17, 18 or 19 wherein the outer containment means comprises a tire.
21. A bomb disposal unit according to claim 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20 wherein the inner container is formed of a plurality of laminations of resilient material.
22. A bomb disposal unit according to claim 1 wherein the outer containment means is a resilient and inflatable outer container having inflation means facing the peripheral wall of the inner container and secondary venting means; said outer container is an uninflated state prior to detonation of the explosive charge and whereby after detonation of the explosive charge, the portion of the blast that escapes from the inner container to the outer container does so mainly through the venting means and inflation means and some of the portion of the blast escapes the outer container through the secondary venting means and the remainder of the portion of the blast inflates the outer container thereby removing blast energy from the inner container.
23. A bomb disposal unit according to claim 22 wherein the closed bottom has a concave like inner surface to help direct the blast and fragmentation toward the open top.
24. A bomb disposal unit according to claim 22 or 23 wherein the cross sectional area of the inner container is uniform from the closed bottom to the top or increases from the closed bottom to the top.
25. A bomb disposal unit according to claim 22, 23 or 24 further comprising bomb support means coupled with the inner container for supporting the explosive charge within the inner container.
26. A bomb disposal unit according to claim 22, 23, 24 or 25 further comprising a resilient base placed under the inner container and the outer container.
27. A bomb disposal unit according to claim 22, 23, 24, 25 or 26 further comprising a ballistic blanket to be placed over the open top of the inner container.
28. A bomb disposal unit according to claim 22, 23, 24, 25, 26 or 27 wherein the bomb support means supports the explosive charge above the venting means but below the open top and completely out of intimate contact with the peripheral wall of the inner container.
29. A bomb disposal unit according to claim 22, 23, 24, 25, 26, 27 or 28 wherein the venting means comprise a plurality of vent holes.
30. A bomb disposal unit according to claim 29 further comprising a mesh attached to the inner container and covering the vent holes to help prevent the egress of the fragmentation.
31. A bomb disposal unit according to claim 22, 23, 24, 25, 26, 27, 28, 29 or 30 wherein the inner container is formed of a plurality of laminations of resilient material.
32. A bomb disposal unit according to claim 22, 23, 24, 25, 26, 27, 28, 29, 30 or 31 wherein the outer container comprises:
a plurality of stacked, inflatable, flexible, resilient, annular containers with sidewalls; each annular container having at least one opening facing the peripheral wall of the inner container; and coupling means of sufficient strength to ensure that the annular containers remained stacked after detonation;
and whereby after detonation of the explosive charge, the portion of the blast that escapes from the inner container to thee outer container does so mainly through the vent holes and the openings of the annular containers and some of the portion of the blast escapes the outer container between the plurality of stacked annular containers removing blast energy from the bomb disposal unit and the remainder of the portion of the blast inflates the annular containers removing blast energy from the inner container and causing the sidewalls to expand against themselves forming a seal between the sidewalls of each pair of annular containers and thereby helping to prevent the egress of the portion of fragmentation, if any, that escapes from the inner container into the outer container.
a plurality of stacked, inflatable, flexible, resilient, annular containers with sidewalls; each annular container having at least one opening facing the peripheral wall of the inner container; and coupling means of sufficient strength to ensure that the annular containers remained stacked after detonation;
and whereby after detonation of the explosive charge, the portion of the blast that escapes from the inner container to thee outer container does so mainly through the vent holes and the openings of the annular containers and some of the portion of the blast escapes the outer container between the plurality of stacked annular containers removing blast energy from the bomb disposal unit and the remainder of the portion of the blast inflates the annular containers removing blast energy from the inner container and causing the sidewalls to expand against themselves forming a seal between the sidewalls of each pair of annular containers and thereby helping to prevent the egress of the portion of fragmentation, if any, that escapes from the inner container into the outer container.
33. A bomb disposal unit according to claim 32 wherein this outer containers comprises a plurality of stacked tubeless tires tied together with rope.
34. A bomb disposal unit according to claim 32 or 33 wherein the shape of the inner container is a truncated right circular cone with the closed bottom attached to the cone at the truncation plane.
35. A bomb disposal unit according to claim 22, 23, 24, 25, 26, 27, 28, 29, 30 or 31 wherein the outer container comprises:
an inflatable, flexible, resilient, annular container having sidewalls, at least one opening facing the peripheral wall of the inner container and secondary vent holes; and and whereby after detonation of the explosive charge, the portion of the blast that escapes from the inner container to the outer container does so mainly through the vent holes and the opening of the annular container and some of the portion of the blast escapes the outer container through the secondary vent holes removing blast energy from the bomb disposal unit and the remainder of the portion of the blast inflates the annular container removing blast energy from the inner container.
an inflatable, flexible, resilient, annular container having sidewalls, at least one opening facing the peripheral wall of the inner container and secondary vent holes; and and whereby after detonation of the explosive charge, the portion of the blast that escapes from the inner container to the outer container does so mainly through the vent holes and the opening of the annular container and some of the portion of the blast escapes the outer container through the secondary vent holes removing blast energy from the bomb disposal unit and the remainder of the portion of the blast inflates the annular container removing blast energy from the inner container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002246785A CA2246785C (en) | 1998-09-08 | 1998-09-08 | Bomb disposal unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002246785A CA2246785C (en) | 1998-09-08 | 1998-09-08 | Bomb disposal unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2246785A1 CA2246785A1 (en) | 2000-03-08 |
| CA2246785C true CA2246785C (en) | 2001-09-04 |
Family
ID=4162806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002246785A Expired - Fee Related CA2246785C (en) | 1998-09-08 | 1998-09-08 | Bomb disposal unit |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2246785C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9234732B1 (en) | 2013-02-04 | 2016-01-12 | The United States Of America As Represented By The Secretary Of The Navy | Explosives storage system |
| CN114963914B (en) * | 2022-04-21 | 2024-01-26 | 靖江荣平警用装备制造有限公司 | Flexible sound-insulation explosion-proof barrel |
-
1998
- 1998-09-08 CA CA002246785A patent/CA2246785C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2246785A1 (en) | 2000-03-08 |
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