HYDRAULIC SYSTEM OF INDUSTRIAL TRACTOR Russian patent published in 1997 - IPC

FIELD: mechanical engineering; industrial tractors. SUBSTANCE: hydraulic system has flow transducer installed in head source return hydraulic line, device to cutoff off head source or emergency signalling device with normally closed contact in supply circuit controlled by above indicated flow transducer. Flow transducer is made in form of controlled two-position throttle. Minimum opening position of throttle corresponds to delivery of working fluid into piston apace of hydraulic cylinder, and wide opening position corresponds to delivery of fluid into rod space of hydraulic cylinder. EFFECT: enhanced reliability of operation. 5 dwg