CARTRIDGE Russian patent published in 2014 - IPC F42B5/02 

FIELD: weapons and ammunition.

SUBSTANCE: invention refers to ammunition, and namely to cartridges for underbarrel grenade guns. A cartridge includes a grenade and a two-chamber case with propellant charge. Grenade is attached to the two-chamber case through a destructible connection. The two-chamber case includes a high-pressure chamber, a low-pressure chamber, a metal mesh and an augmented plug. Flow ports of the high-pressure chamber are made in the chamber wall. The metal mesh is in-series fixed between flow ports of the high-pressure chamber and propellant charge. Cells of the metal mesh are a bit smaller than minimum size of powder elements of propellant charge. The case is equipped with an additional chamber. The additional chamber cavity is connected to the high-pressure chamber cavity through flow ports of the high-pressure chamber. The additional chamber cavity is also connected to the low-pressure chamber cavity through flow ports of the low-pressure chamber. Flow ports of the low-pressure chamber are made in the chamber wall. Flow ports of the low-pressure chamber have flow surface area that is a bit larger than that of flow ports of the high-pressure chamber. Flow ports of the low-pressure chamber and flow ports of the high-pressure chamber are offset relative to each other. Grenade is installed with its bottom into the case so that it is borne against its additional chamber.

EFFECT: improvement of firing accuracy and reduction of grenade weight.

2 cl, 2 dwg