HYDRAULIC PERCUSSIVE MECHANISM Russian patent published in 1995 - IPC

FIELD: construction and mining industries. SUBSTANCE: hydraulic percussive mechanism has body with energy accumulator, cocking chamber, striker having piston with rod and valve. Striker has recess and channels communicated with return chamber and the latter is communicated with return main line. Valve is concentrically located on striker rod for axial motion. Valve surface forms circular slot throttle together with body inner surface, and end surface, rod and body inner surface form hollow which is communicated with pressure line. EFFECT: higher efficiency. 1 dwg