Industrial ammunition
A projectileless ammunition system ( 20; 320 ) includes a metallic case ( 22; 322 ). A propellant charge ( 26; 326 ) is carried by the case and covered by an over-powder member ( 24; 324 ) in the absence of a separate projectile. The ammunition is advantageously used with an industrial ballistic tool operating so that each spent case serves as the effective projectile to be propelled by firing of the next round of ammunition.
1. Ammunition for use with a discharging apparatus that includes a chamber for receiving the ammunition, a muzzle and a barrel between the chamber and the muzzle, the ammunition comprising:
a case formed of a cast zinc or a cast zinc-based alloy that extends aft-to-fore from a base to a mouth and has interior and exterior surfaces;
a propellant charge;
a primer mounted in an aft portion of the case; and
a cover engaging said fore portion of said case and cooperating with the case to define a powder chamber to enclose both the propellant charge and an open forward volume, wherein a similar case is expelled from said muzzle on ignition of said propellant charge.
2. The ammunition of claim 1 wherein:
the primer is a #209 primer; and
the case has a mass of between 70 g and 100 g and a maximum diameter of between 20 mm and 26 mm.
3. The ammunition of claim 1 wherein:
the cover is formed of a resinous polymer;
the fore portion of the case includes an outwardly extending flange having an outwardly extending flange diameter; and
the cover rear portion includes an inwardly extending flange that engages said outwardly extending flange causing said cover to resist forward translation relative to the case.
4. The ammunition of claim 3 wherein said propellant charge contacts both said inwardly extending flange and said outwardly extending flange.
5. The ammunition of claim 4 wherein said cover has a length that is from 100% to 300% a length of said case.
6. The ammunition of claim 5 wherein an intermediate portion of said cover is locally weakened.
7. The ammunition of claim 6 wherein said intermediate portion includes an annular channel forming a reduced thickness intermediate portion.