PNEUMATIC HAMMER Russian patent published in 1998 - IPC

FIELD: mining industry. SUBSTANCE: pneumatic hammer includes body with exhaust holes and striker, handle, casing-silencer with cap, rigidly secured rim with inclined recesses, tiers of radial discharge channels, working tool with its holder. Rim is secured from inside of casing-silencer which is provided with air deflector cone ring on the side of cap. Cone ring narrows towards working tool. Tiers of exhaust channels are made in cap and at lever of cone ring. EFFECT: higher efficiency of suppression of noise of exhaust air. 2 dwg