HYDRAULIC DRIVE OF SUCTION TUBE DREDGE PILE EQUIPMENT Russian patent published in 1996 - IPC

FIELD: suction tube dredges. SUBSTANCE: hydraulic drive of pile equipment has hydraulic pump, hydraulic control valve unit, hydraulic cylinder, pressure and return hydraulic lines and two-position spring-loaded hydraulic valve with hydraulic control chamber. In one of its positions hydraulic valve places rod space of hydraulic cylinder in communication with pressure hydraulic line, and in other position, with return hydraulic line. Piston space of hydraulic cylinder coupled with hydraulic control valve unit, is connected with hydraulic control chamber of hydraulic valve. EFFECT: enhanced operation reliability. 1 dwg