PERFORATOR Russian patent published in 2015 - IPC E21B6/06 B25D17/02 

FIELD: construction.

SUBSTANCE: perforator comprises a hammer-stone, comprising main and auxiliary strikers, at the same time the auxiliary striker is made with an inner cavity made of two parts. The cavity at the side of the main striker is connected with the outer surface of an air supply tube, which aligns colliding auxiliary striker and a rod. The auxiliary striker of diameter D has inner cavities with length L₁ and L₂, besides, the cavity at the side of the main striker, with length L₂ and diameter D₁<0.5D, is connected with the outer surface of the air supply tube, which aligns the colliding striker and the rod, and the cavity at the side of the rod is made expanded, besides L₂>2L₁, and the end of the air supply tube has at least four holes, axes of which are tangent to ledges of the expanding part of the auxiliary striker, and the central hole for water or air supply.

EFFECT: reliable process of bounce and stable operation of a perforator.

5 dwg