PNEUMATIC HAMMER Russian patent published in 2017 - IPC B25D9/26 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to pneumatic hammer. Pneumatic hammer contains cylindrical housing, working tool, rod with shutoff valve, stepped striker with rod and piston parts, with central channel and bushing with longitudinal slot channel in its hole arranged in its rod part central channel. Stepped striker divides cylindrical housing cavity on annular distribution chamber and idle stroke chamber. Rod with shutoff valve constantly interacts with longitudinal slot channel in bushing hole and, depending on stepped striker position, periodically connects annular distribution chamber and idle stroke chamber to each other. Idle stroke chamber is made with discharge channel. On stepped striker outer piston part annular groove is made. In stepped striker piston part on central channel side with output to said groove radial channel is made, periodically communicated with idle stroke chamber discharge channel and atmosphere.

EFFECT: result is elimination of stepped striker repeated impacts on cylindrical housing.

1 cl, 2 dwg