HYDRAULIC DRIVE Russian patent published in 2001 - IPC

FIELD: positive displacement drives. SUBSTANCE: proposed hydraulic drive has controllable hydraulic distributor and two double-space hydraulic motors one of which is provided with piston and rod spaces. Other hydraulic motor is made in form of hydraulic cylinder with two-sided rod with different diameter parts which form, in hydraulic cylinder housing, two spaces differing in volume. Housing of hydraulic cylinder has neck at side of larger diameter rod. Hydraulic motors are rigidly coupled with each other and are hydraulically coupled by connection of piston space of one hydraulic motor with smaller volume space of other hydraulic motor and connection of rod space of one hydraulic motor with larger volume space of other hydraulic motor. EFFECT: optimization of design, enlarged operating capabilities, preservation of serviceability of hydraulic drive in case of emergency de-energizing of control system. 6 cl, 1 dwg