PNEUMATIC HAMMER WITH THROTTLING AIR DISTRIBUTION Russian patent published in 2010 - IPC B25D9/04 E21C37/24 

FIELD: technological processes.

SUBSTANCE: invention is related to construction equipment and is intended for destruction of hard materials with manmade and natural origin. Pneumatic hammer comprises network camera, handle, hollow cylinder, striker arranged in it with central channel, which separates cavity of specified cylinder into chambers of idle stroke and working stroke, tube pulled through central channel of striker and connecting network camera with idle stroke chamber, and working tool with tail. At cylinder end on the side of working stroke chamber there is fixed cover installed with central through opening for tube insertion through it. Side surfaces of tube and central through hole in cover produce throttling channel, which connects network camera with chamber of working stroke. Chamber of working stroke communicates by means of relief channel to accumulation chamber. Radial outlet channel is arranged in cylinder side wall. In central tube, coaxially to it, there is additional tube installed with annular gap. Additional tube is made of elastic material with closed end on the side of idle stroke chamber and is fixed by fastening elements relative to central tube with provision of network camera communication to chamber of idle stroke by means of annular gap.

EFFECT: invention provides for reduction of inefficient air flow.

2 cl, 2 dwg