ASSEMBLY OF CORE CATCHERS Russian patent published in 1995 - IPC

FIELD: mining. SUBSTANCE: assembly of core catchers is made in form of body with adapter. Body accommodates holder with toggles having cutting edges and mounted in holder recess and pressed by springs. Holder has in its upper part a conical seat in which conical ring of collet core catcher is installed. Toggle length from cutting edge exceeds distance in height from this axis to lower edge of collet core catcher. EFFECT: higher reliability and efficiency of operation of assembly of core catchers due to combined operation of core catchers, increased yield of core and reduced labor input in their manufacture. 2 dwg