Light armor piercing automatic rifle

Details Light armor piercing automatic rifle Light armor piercing automatic rifle

1992-04-06

1993-04-13

Bentley, Stephen C.

Ordnance

Pneumatic

89 141, 89 142, 89 143, 89 3302, 89 3303, 89 3305, 89155, 8919101, 42 74, 102376, F41A 104, F41A 1300

Patent

active

052025306

ABSTRACT:
A light armor piercing weapon, which is hand carried by a single man, is provided for firing or launching armor piercing rocket propelled projectiles. A propellent pack is worn or carried by the soldier along with a launching rifle. Unsymmetrical dimethylhydrazine is provided as a propellent and inhibited red fuming nitric acid, Type IIIa, is provided as an oxidant in a combustion chamber in the rifle. The explosive combination of the propellent and oxidant propels the projectile out of a smooth bore barrel and simultaneously ignites the solid propellent in the projectile. The projectile is provided with a disposable sabot which seals the projectile within the smooth bore. The projectile is provided from a spiral drum magazine which is gear driven by a mechanical coupling with a reciprocating breech block within the rifle. The reciprocating breech block in turn is gear driven by a gas driven piston communicated with the barrel. A ramming rod is also gas driven from the barrel to dispose the projectile into the breech block synchronously with reciprocation of the block. Coolant in a closed loop cooling system is pumped through the rifle by the reciprocating action of the breech block, which has pumping chambers which are effective upon reciprocation of the block. The coolant is used to cool the breech block and the combustion chamber within the rifle. Excess heat from the coolant is transferred to the ambient environment by an air-to-coolant heat exchanger carried in the propellent pack. The rifle butt is provided with a hydraulic recoil shock absorber. The barrel is provided with a muzzle brake and flash hider. The initial round is mechanically cocked and a manual unloading mechanism is provided to eject an unlaunched projectile.

REFERENCES:
patent: H403 (1988-01-01), Glasser
patent: 1269574 (1918-06-01), Anthony et al.
patent: 2376321 (1945-05-01), Albertson
patent: 3969978 (1976-07-01), Seifert et al.
patent: 4005632 (1977-02-01), Holtrop
patent: 4197800 (1980-04-01), Greever et al.
patent: 4915010 (1990-04-01), Bleickert et al.

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