DEVICE FOR LOCKING PERFORATOR WORKING TOOL Russian patent published in 1995 - IPC

FIELD: perforators. SUBSTANCE: device for locking perforator working tool has body accommodating perforator drive, working tool with shank and lock of working tool with shaped channel to pass working tool shank. Body has boss on its front end. Body and boss form a blind socket to accommodate lock. Lock is made in form of strip. Strip is installed in socket for limited longitudinal motion and is spring- loaded relative to boss. Shank has shaped recess on its outer side surface for accommodation of strip. Shaped channel of lock has conjugated parts - upper part for passing shank, and lower part for location of shaped recess on shank. Body and boss has coaxial channels to pass working tool shank. EFFECT: higher efficiency. 15 cl, 8 dwg