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 network chamber, hollow cylinder, striker installed in it with central channel, which separates cylinder cavity in chambers of idle run and working stroke, tube passed through central channel of striker, which constantly connects network chamber with idle run chamber, additional tube coaxially installed and coupled with it with creation of longitudinal relief channel between them with radial relied channels, cover with collar and central through hole and working tool. In cylinder lateral side discharge channels are arranged. Tube is arranged with the possibility of axial and radial displacement relative to central through hole of cover, and has collar on cover side for interaction with cover opening seat. Annular afterburner without circulation is created between sleeve wall and external side surface of cylinder. Afterburner channels are arranged in cylinder wall. Distances between most distant edges of afterburner channels and radial relief channel arranged on the side of working stroke chamber, between most distant edge of afterburner channel and most distant edge of outlet channels and between most distant edge of radial relief channel installed from the side of idle run chamber, and most distant edge of outlet channel is less than length of striker generatrix.

EFFECT: collision speed is increased, and time of striker motion is reduced.

1 dwg