FIREARM PROJECTILE USABLE AS A HAND GRENADE

Abstract

A projectile includes a body containing pyrotechnic material. A rear cap closes a rear end of the body. A pyrotechnic unit includes an ignitor in communication with the pyrotechnic material. A striker is arranged to strike a primer of the pyrotechnic unit. A safety lever is arranged initially to restrain movement of the striker towards the pyrotechnic unit. An external safety keeper is arranged initially to clamp a portion of the safety lever to the body.

Claims

1. A method of using a projectile comprising: providing a projectile having a body shaped as a cartridge insertable into a chamber of a weapon, wherein the projectile is fireable from the chamber of the weapon but also throwable as a hand grenade.

2. The method according to claim 1, wherein said projectile comprises: a body containing pyrotechnic material; a rear cap that closes a rear end of said body; a pyrotechnic unit comprising an ignitor in communication with said pyrotechnic material; a striker arranged to strike a primer of said pyrotechnic unit, said striker being biased by a biasing device; a safety lever arranged initially to restrain movement of said striker towards said pyrotechnic unit; and an external safety keeper arranged initially to restrain movement of said safety lever; said projectile having two modes of operation, one as a hand grenade and another as a firearm projectile, wherein for use as a hand grenade, the method comprises removing said external safety keeper, gripping the projectile around said safety lever and throwing the projectile, whereupon said safety lever moves to release said striker, which is urged by said biasing device to strike said primer of the pyrotechnic unit to cause ignition of said pyrotechnic material; and wherein for use as a projectile, the method comprises inserting said projectile in a chamber of a weapon, which removes thereby said external safety keeper, wherein said projectile is dimensioned so that as long as said projectile is in the chamber, said safety lever engages said striker and prevents said striker from striking said primer of the pyrotechnic unit, and shooting a charge chambered in the weapon, wherein a force of the charge after being shot is directed against said rear cap of the projectile, thereby propelling the projectile out of the weapon, whereupon said safety lever moves to release said striker, which is urged by said biasing device to strike said primer of the pyrotechnic unit to cause ignition of said pyrotechnic material.

3. The method according to claim 1, wherein said pyrotechnic material comprises a non-lethal pyrotechnic material for riot control.

4. The method according to claim 1, wherein said pyrotechnic material comprises a chemical irritant agent.

5. A projectile comprising: a body shaped as a cartridge insertable into a chamber of a weapon, said body containing pyrotechnic material; a rear cap that closes a rear end of said body; a pyrotechnic unit comprising an ignitor in communication with said pyrotechnic material; a striker arranged to strike a primer of said pyrotechnic unit, said striker being biased by a biasing device; a safety lever arranged initially to restrain movement of said striker towards said pyrotechnic unit; and an external safety keeper arranged initially to clamp a portion of said safety lever to said body.

6. The projectile according to claim 5, wherein said striker is disposed in a safety housing and said safety lever comprises a resilient lever and a lug that enters through a port formed in said safety housing, said lug initially engaging said striker.

7. The projectile according to claim 6, wherein said safety lever comprises tabs that resiliently attach to an outer contour of said safety housing.

8. The projectile according to claim 5, wherein said body comprises a front body portion formed with one or more apertures and a rear body portion formed with one or more apertures.

9. The projectile according to claim 6, further comprising an auxiliary safety arranged initially to restrain movement of said striker towards said pyrotechnic unit.

10. The projectile according to claim 5, wherein said pyrotechnic material comprises a non-lethal pyrotechnic material for riot control.

11. The projectile according to claim 5, wherein said pyrotechnic material comprises a chemical irritant agent.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be understood and appreciated more fully from the following detailed description, taken in conjunction with the drawings in which:

[0018] FIGS. 1 and 2 are simplified pictorial and exploded illustrations, respectively, of a projectile which can be used as a hand grenade, constructed and operative in accordance with a non-limiting embodiment of the present invention; and

[0019] FIG. 3 is a simplified sectional illustration of the projectile, taken along lines A-A in FIG. 1.

DETAILED DESCRIPTION OF EMBODIMENTS

[0020] Reference is now made to FIGS. 1-3, which illustrate a projectile 10, constructed and operative in accordance with a non-limiting embodiment of the present invention.

[0021] The projectile 10 includes a body 12, which may include a front body portion 14 formed with one or more apertures 16 and a rear body portion 18 formed with one or more apertures 20. Both the front body portion 14 and the rear body portion 18 may be cylindrical in shape, although the invention is not limited to this shape. The front body portion 14 may have a smaller circumference than the rear body portion 18.

[0022] Body 12 is shaped as a cartridge which is insertable into the chamber of a weapon, and as such, is preferably cylindrical in shape, but may be of other suitable shapes depending on the weapon. As is known in the art, the chamber is the part of the weapon into which a cartridge is inserted; the chamber is in the breech of the weapon.

[0023] The body 12 has an inner chamber 22 which may contain pyrotechnic material 24. For example, material 24 may include a non-lethal pyrotechnic material for riot control, such as but not limited to, chemical irritant agents, e.g., CS (o-chlorobenzylidene malononitrile) or OC (oleoresin capsicum). As another example, material 24 may include material used in flash-bang devices, such as but not limited to, magnesium or ammonium nitrate pyrotechnic mixtures used in stun grenades (less-lethal grenades), or a combination of pyrotechnic charge and balls or pellets, such as in non-lethal bursting hand grenades that release a shower of pellets to sting and disorient individuals.

[0024] The above are intended for use as non-lethal or less-lethal materials. In another embodiment of the invention, the projectile may be used with lethal materials.

[0025] A rear cap 26 is provided to close the rear end of the body 12.

[0026] For use with pyrotechnic materials, projectile 10 includes a pyrotechnic unit 28, which includes a primer 28A, delay fuse 28B and ignitor 28C. As seen in FIG. 3, the ignitor 28C communicates with pyrotechnic material 24 for ignition thereof. After ignition, the pyrotechnic material 24 exits through apertures 16 and 20.

[0027] A striker 30 is arranged to strike primer 28A of the pyrotechnic unit 28. As seen in FIG. 3, striker 30 is initially restrained by a lug 32 of a safety lever 34. Safety lever 34 may include a resilient lever 36 and tabs 38. Lug 32 enters through a port 40 formed in a safety housing 42 in which striker 30 is disposed. Tabs 38 resiliently attach to the outer contour of safety housing 42.

[0028] Safety lever 34 is initially held in place on safety housing 42 by an external safety keeper 44, which may include arcuate protrusions 46. Striker 30 is biased by a biasing device 48, such as a coil spring. In the initial position shown in FIG. 3, biasing device 48 is compressed. When external safety keeper 44 is removed, the resilient lever 36 of safety lever 34 moves (radially outwards), which releases lug 32 from striker 30. The force of biasing device 48 causes striker 30 to strike primer 28A of the pyrotechnic unit 28, which eventually causes ignition of pyrotechnic material 24.

[0029] The forward part of projectile 10 may include an auxiliary safety 50, which may be turned to keep safety lever 34 against the safety housing 42 (as an added safety measure to external safety keeper 44). A front cap 52 closes the forward part of projectile 10.

[0030] When used as a hand grenade, the thrower simply removes the external safety keeper 44 (and, if necessary, turns the auxiliary safety 50), grips the projectile around the resilient lever 36 of safety lever 34 and throws the projectile. The resilient lever 36 of safety lever 34 is now free to move radially outwards, which releases lug 32 from striker 30, which is urged by biasing device 48 to strike primer 28A of the pyrotechnic unit 28, which eventually causes ignition of pyrotechnic material 24.

[0031] When used as a rifle projectile, the user simply inserts projectile 10 in the chamber of a weapon, such as the grenade receiving portion of a standard grenade rifle (not shown). The action of inserting the projectile in the chamber removes the external safety keeper 44. If auxiliary safety 50 is used, the shooter may turn the auxiliary safety 50 when placing the projectile in the weapon so that auxiliary safety 50 does not interfere with movement of safety lever 34. The projectile is dimensioned so that as long as the projectile is in the chamber, the safety lever 34 remains close to the safety housing 42 and lug 32 still engages striker 30. A blank cartridge (or other suitable charge) is then chambered in the weapon (e.g., behind the projectile in the chamber of the grenade rifle). The force of the shot charge is directed against rear cap 26 of the projectile, thereby propelling the projectile out of the barrel of the grenade rifle. The resilient lever 36 of safety lever 34 is now free to move radially outwards, which releases lug 32 from striker 30, which is urged by biasing device 48 to strike primer 28A of the pyrotechnic unit 28, which eventually causes ignition of pyrotechnic material 24. The rear cap 26 is made of a material that can withstand the brunt of the explosive charge from the weapon.