PERFORATOR Russian patent published in 2012 - IPC E21B6/00 

FIELD: construction.

SUBSTANCE: perforator comprises a rock-breaking tool, a casing with a rotary mechanism installed in it and a doubled striker, comprising the main and auxiliary anvil blocks, an air-distribution system, a rotary and an end axle-boxes, differing by the fact that the auxiliary anvil block has an inner cavity with an elastic element made as narrowing and expanding parts, besides, the minimum diameter of the cavity D is accepted as more than the diameter of the right end part of an air duct tube, and the maximum diameter D₁ of the cavity at the side of the rod is selected based on the ratio where S₁ is the area of contact of the auxiliary anvil block with the rod; S₂ is the area of end section of the rod.

EFFECT: higher reliability of design operation, due to provision of reliable process of the auxiliary anvil block chatter between the main anvil block and the rod, and bounce of the auxiliary anvil block from the rod in the end of working travel.

3 dwg