PORTABLE PNEUMATIC ROCK BREAKER Russian patent published in 2011 - IPC B25D9/00 E21C37/12 E21C37/24 

FIELD: process engineering.

SUBSTANCE: invention to explosive rock breaking. Proposed device comprises case with channel that makes barrel receiving pressure and hammer sleeve with channel running through said sleeve to accommodate said hammer that slides therein. One end of hammer sleeve is locked at barrel bottom. Barrel houses piston. Magnet is arranged at barrel top part, nearby pressure inlet. Hammer comprises tip and retaining head. Retaining head width exceeds that of channel in hammer sleeve. Hammer length exceeds that of hammer sleeve. Hammer tip may come in contact with cartridge detonator. Piston is arranged in barrel to slide therein between magnet and retaining head. Magnet attracts and retains piston top part. Barrel pressure inlet allows fluid feed between barrel and piston top part for piston to be displaced by pressure to strike against retaining head.

EFFECT: simplified portable design.

24 cl, 9 dwg