AIR-DRIVEN PERCUSSION MACHINE FOR LONG ROD DRIVING IN SOIL Russian patent published in 2015 - IPC E02D7/10 

FIELD: process engineering.

SUBSTANCE: invention relates to mining and construction equipment, particularly, to air-drive percussion machine for driving the long rods in soil. Claimed machine comprises casing with outlet channel to house the hammer enveloping the central pipe, anvil with taper cams for long rod gripping, chamber of working and back strokes with feed channels. Central pipe rear part has larger-diameter stage. Hammer is located over the central pipe outer surface and its stage. Working stroke chamber is composed of the hammer inner surface and central pipe outer surface. Note here that at least one working strike chamber feed channel is made in said stage of central pipe permanently communicated with feed channel.

EFFECT: higher efficiency, longer life, manufacturability and friendly use.

3 cl, 1 dwg