DEVICE FIR UNSCREWING AND CALIBRATED TORQUING OF FASTENERS Russian patent published in 1997 - IPC

FIELD: tools for fastener unscrewing and calibrated tightening. SUBSTANCE: the offered device has one of changeable springs 8 calibrated for preset torque intended for connection of flexible member 6 with handle 4. Installed in body 1 is case 9 accommodated changeable springs 8. Stops 10 are designed for limiting stroke of spring 7 connecting flexible member 6 with body 1. Installed in central socket 3 of working head 2 is changeable attachment head of standardized set. Latch 11 is introduced into hole 12 for connection of body 1 with handle 4. Unscrewing and tightening are carried out similar to that as they are performed by a common wrench. Upon attaining in tightening of the preset value of torque, flexible member 6 slips over surface of working head 2 and tightening is discontinued. EFFECT: higher efficiency. 2 cl, 1 dwg