MECHANICAL SCREWDRIVER Russian patent published in 1994 - IPC

FIELD: applicable tools. SUBSTANCE: when the load increases clutch member 3 skids on clutch member 11. Stopping clutch member 11 entrains clutch member 9 which profile hollow angle is less than the friction angle in pair 10-11. Clutch member 9 slightly turns around carrier 6 and balls 8 and axially moves to clutch member 11. Clutch member 11 disengages with clutch member 3, its springs are additionally compressed and the transferred torque increases. EFFECT: widened scope of operation. 5 dwg