TOOL WITH ACTIVE CLAMPING FORCE OF SIDEWALL AND SEQUENCE OF ASCENDING SIDEWALL Russian patent published in 2016 - IPC A01B63/00 A01B15/00 

FIELD: agriculture.

SUBSTANCE: hydraulic system comprises a load sensing adjustable pump, a multipositional valve of selective control, cylinder structures of the sidewall and a central frame of the tool, an adjustable valve of pressure, connection for supplying hydraulic flow from the pump into the inlet of the adjustable valve of pressure, a blocking valve means. And the blocking valve means is made with the ability to close the connection as long as the pressure of fluid from the multipositional valve of selective control is applied to the second end of the cylinder structure of the sidewall, after which the valves open the connection and maintain it open when the multipositional valve of selective control returns to the neutral position. According to another embodiment of the hydraulic system, the first and the second control directing valves of hydraulic blocking means are arranged in the supply of the hydraulic flow, are normally closed and maintained in open state by pressure of hydraulic flow supply when the multipositional valve of selective control is returned to the neutral position.

EFFECT: hydraulic system enables to activate and deactivate the power source sensitive to load, depending on the function of the selective control valve.

13 cl, 2 dwg