AIR HAMMER WITH THROTTLE AIR DISTRIBUTION Russian patent published in 2011 - IPC E21C37/24 B25D9/04 

FIELD: mining.

SUBSTANCE: air device of impact action includes housing with radial outlet channel and central channel, cover plate with annular collar and central hole, hammer with axial through channel dividing the central channel into chambers of working and idle strokes, tube with collar on the side of cover plate, longitudinal and radial channels, shell installed so that annular accumulation chamber is formed between side surfaces of the shell and housing, air baffle ring with outlet holes, outlet chamber formed between housing and air baffle ring, and working tool. Additional tube with radial channel is installed coaxially to the tube and is adjacent to it. Tube from elastic material is installed between tube an additional tube.

EFFECT: avoiding unproductive air flow rate from the network by means of idle stroke chamber when it is interconnected with atmosphere.

2 dwg