HAND IMPACT TOOL Russian patent published in 1994 - IPC

FIELD: hand impact tools. SUBSTANCE: tool has hollow body 1, striker 2, working member 3 with shank 4 and tip 5 and row of balls 5 arranged between shank 4 and striker 2. Recess 8 is made in extreme ball 7 of row at side of shank 4. Recess has surface in form of paraboloid of revolution with vertex in center of this ball 7 and focal point in apex of tip 5 of working member 3. End of shank 4 is mated with surface of recess of ball 7. Tip 5 is detachable. All assembly of movable members of tool is clamped in body by union nut 12. When hammering at head of striker 2 potential energy of hammer is converted into kinetic energy which is transmitted to shank 4 and tip 5 of working member through balls 6 and 7. EFFECT: enhanced capacity owing to concentration of energy of impact on working member tip. 2 dwg