PNEUMOHYDRAULIC ACCUMULATOR Russian patent published in 1999 - IPC

FIELD: hydraulic systems. SUBSTANCE: proposed device has housing with piston-type media separator between housing spaces, and additional piston installed in correcting space communicating with pneumatic space of accumulator. Additional piston is made stepped and is installed in different section spaces. Behind-the-piston spaces can be connected either with main line or with drain line. Maximum-size step of additional piston exceeds area of main piston, and minimum size step is equal to area of main piston. Locks to provide stopping of additional piston in preset position are installed in housing of pneumohydraulic accumulator. pressure transducer is installed in main line connecting behind-the-piston spaces of additional piston with main line. EFFECT: possibility of parameter control of hydraulic system. 4 cl, 2 dwg