PORTABLE APPARATUS FOR PULSE CUTTING Russian patent published in 2002 - IPC

FIELD: equipment used, mainly in extremal conditions for cutting reinforcing pieces, breaking stone plates and other similar works. SUBSTANCE: apparatus includes cylinder with openings, piston with rod arranged in cylinder with possibility of being driven by means of pressure source; actuating mechanism joined with piston. Cylinder has inner lengthwise grooves beginning in end zone of working stroke of piston and having length that exceeds piston height at least by 1/4. Openings in wall of cylinder are parallel relative to its axis in zone of groove beginning; said openings are open to atmosphere. EFFECT: increased useful energy of piston. 1 dwg