HYDRAULIC PERCUSSION ACTION APPARATUS Russian patent published in 2002 - IPC

FIELD: pneumatic drills and perforators. SUBSTANCE: hydraulic percussion action apparatus includes housing with handle, slide gate distributor, arranged in housing : working tool, piston-striker and working-stroke plunger. Mass values of working tool, piston-striker and working-stroke plunger are mutually related by next relations: m2=(2.4-3.1)m1; m3=(2.4-3.1)m2, where m1 is mass of working tool, m2 is mass of piston-striker, m3 is mass of working-stroke plunger. EFFECT: increased unit energy of percussion, enhanced efficiency, reduced leakage of working liquid. 4 cl, 2 dwg