FIXTURE FOR SCREWING ON AND UNSCREWING DRILL BITS Russian patent published in 1996 - IPC

FIELD: mining industry, drilling engineering. SUBSTANCE: in fixture complex-shaped foundation 3 is disposed in upper part of housing 1, limiters 4 of cranking are located on complex-shaped foundation 3. Limiters 4 of cranking can be made as removable members. Complex-shaped foundation 3 can be made with notches and equipped with stoppers for interacting with limiters 4 of cranking. The latter can be made in the form of thread mechanism whose mobile part is mounted for radial displacement. EFFECT: enhanced reliability. 3 cl, 3 dwg