PNEUMATIC IMPACT MECHANISM Russian patent published in 2016 - IPC E21B1/30 E21B1/38 E21C37/24 

FIELD: construction.

SUBSTANCE: invention relates to construction and mining industry, in particular to pneumatic devices of impact action. Device includes cylindrical housing with bushing and outlet channels, working tool with shank, stepped striker with rod and main parts, with central channel and hole in rod part of stepped striker, dividing cavity of cylindrical housing to circular distribution chamber within bushing of cylindrical housing at side of rod part of stepped hammer, and chamber of idle stroke at side of working tool shank, annular flange with holes to feed air into circular distributing chamber and through axial channel for passage of rod with shutoff valve, fastening shell fixed relative to cylindrical case, supply air chamber formed by fastening shell with air feed channel and annular flange. Inner surface of cylindrical housing bushing is equipped with throttling bypass screw slot channel, without output to end of cylindrical housing bushing at side of annular chamber of working stroke. On rod part of stepped striker at side of annular chamber of working stroke, bypass channel is made without output to end of rod part of stepped striker. Throttling bypass screw slot channel of cylindrical housing bushing, and bypass channel are separated between each other, when annular chamber of working stroke is open to atmosphere via outlet channel.

EFFECT: higher energy of single impact and avoiding air wastage in annular chamber of working stroke.

1 cl, 1 dwg