HYDRAULIC PERCUSSIVE DEVICE Russian patent published in 1995 - IPC

FIELD: mining industry. SUBSTANCE: hydraulic percussive device has percussive mechanism 1 and distributor 9. Striker 2 forms chambers 3 and 4 of forward and backward strokes together with body of percussive mechanism 1. Distributor 9 has control valve 10 with turbine 11. Working chamber 12 of turbine 11 is connected with starting line 13 and return line 8. Chambers 3 and 4 of forward and backward strokes are communicated with pressure line 5 and return line 6 through distributor 9. Starting line 13 is made in form of throttling channel of control valve 10 communicating pressure hollow 7 and return hollow 8. When, device is started, hydraulic turbine 11 is given rotary motion by pressure line 5 through starting line 13 and further on, also from return line 6 of percussive mechanism. EFFECT: higher efficiency. 1 dwg