HYDRAULIC HAMMER Russian patent published in 2019 - IPC B25D9/00 

FIELD: construction.

SUBSTANCE: invention relates to hydraulic hammer. Proposed hydraulic hammer comprises housing with pressure and drain holes and sleeve with bore arranged therein and provided with pressure bore and pressure bore and hammer arranged in sleeve. Outer surface of sleeve has annular grooves and two diametrically opposite longitudinal channels. One of the longitudinal channels is connected to the delivery hole of the sleeve. Another longitudinal channel is connected via pressure line of bushing and pressure hole of the case to pressure line. Both longitudinal channels are made with possibility of crossing with at least one annular groove of sleeve.

EFFECT: higher efficiency and reliability of hydraulic hammer.

1 cl, 3 dwg