HYDRAULIC DRIVE Russian patent published in 2003 - IPC

FIELD: hydraulic drives designed for underwater equipment. SUBSTANCE: hydraulic drive includes rigidly interconnected two double-cavity hydraulic prime movers, one of which has piston with two-sided rod having parts of different diameters forming in hydraulic prime mover body, having neck on side of rod large diameter part, different in working volume cavities and also controlled hydraulic control valve connected to both cavities of one hydraulic prime mover and also with pressure and drain lines. In this case, hydraulic prime movers are interconnected by hydraulic links with help of in-pair cross connection of their cavities. At least, one hydraulic prime mover is secured to immovable base. The other hydraulic prime mover is made in form of hydraulic cylinder with piston and two-sided rod having parts of different diameters and forming two different in working volume cavities in hydraulic cylinder body. Said cavities formed correspondingly by parts of large diameter rods in one hydraulic prime mover and by parts of small diameter rod in other hydraulic prime mover are connected to provide possibility for hydraulic prime movers to attain opposite phases of position in extreme positions of hydraulic drive. Hydraulic cylinder body has neck on side of rod small diameter part. EFFECT: higher reliability. 9 cl, 1 dwg