UNIVERSAL MACHINE WRENCH Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: jaw 2 and additional jaw 7 are wound up around pipe 15 and are clicked with latch 8. For this purpose the latch is inserted into groove 10 of jaw 7 until protrusion 9 is fastened in hollow 11, if the pipes have the diameter d, or in hollow 12, if the pipes have the diameter D. The effort applied to the end of lever 1 counterclockwise creates gripping of pipe 15 with jaws 2 and 3 and additional jaw 7. Chuck jaws 4 and 5 and the bearing protrusion of jaw 7 create the necessary contact voltages ensuring the transmission of the torque onto pipe 15. EFFECT: facilitated manufacture. 3 dwg