HYDRAULIC SYSTEM Russian patent published in 1994 - IPC

FIELD: agricultural engineering. SUBSTANCE: in case of break of hydraulic lines in hydraulic system due to abrupt drop of pressure in first end chamber of additional distributor, its spool valve shifts under action of spring mounted in second end chamber and shuts off supply of working fluid to main distributor. Simultaneously, pump creates additional pressure in second end chamber through pressure valve, thus keeping this spool valve in such state when working fluid flows to tank through pressure valve. EFFECT: enhanced efficiency. 2 cl, 3 dwg