PNEUMATIC DEVICE OF IMPACT ACTION WITH THROTTLED AIR DISTRIBUTION Russian patent published in 2009 - IPC B25D9/04 E21C37/24 

FIELD: engines and pumps.

SUBSTANCE: pneumatic device comprises body with radial exhaust channel and central channel, cover with annular collar and central opening, striker with axial through channel, which separates body central channel into chambers of idle run and working stroke, tube with dead collar from the side of cover, longitudinal and radial channels, sleeve installed with creation of annular accumulation chamber between side surfaces of sleeve and body, air-deflection ring with discharge openings, exhaust chamber produced between body and air-deflection ring, and working tool. Additional tube is installed coaxially to tube, being coupled with it, with radial channels to create annular gap between mentioned tubes in the form of displacement channel. Distances between most distant edges of radial exhaust channel and radial channel of additional tube installed on the side of idle run chamber, and between most distant edges of radial exhaust channel and radial channel of additional tube installed from the side of working stroke chamber, is more than length of striker generatrix.

EFFECT: speed of striker collision to working tool is increased.

1 dwg