PNEUMATIC HAMMER WITH THROTTLING AIR DISTRIBUTION Russian patent published in 2008 - IPC E21C37/00 B25D9/14 

FIELD: mechanics.

SUBSTANCE: hammer consists of a body with radial outlet and central channels, lid with central hole, striker with axial through channel splitting central channel into working stroke and idle stroke chambers, tube with dead bead from the side of cover. Cover is provided with radial and longitudinal channels and installed coaxially in central channel and displaced in axial through channel of striker and central hole of lid. Cup in the hammer is tightly installed as regard to hammer body forming circular accumulating chamber, which contacts with working stroke chamber by means of radial bypass channel in hammer body. Network air pre-chamber with air supply channel continuously interacts with compressed air network. Hammer also includes air baffling ring with outlet slotted channel, operating tools with bead interacting with body end, operating tool tongue, cap to prevent operating tool from dropping out from central body channel. Hammer body is provided with groove from the side of cup and lid is located in groove to enable reciprocal movements.

EFFECT: reduction of back pressure forces in working stroke chamber and improvement of hammer vibration indicators.

2 dwg