Mobile work machine with emergency stop function in case of leakage in the work line

Abstract

A mobile working machine includes a lower structure, an upper structure, a boom assembly, and a hydraulic system including a hydraulic pump, a work line, a hydraulic consumer, a volume control valve to regulate hydraulic fluid flow in the work line connected to the consumer in order to control the consumer, and a bypass to bypass the volume control valve. An anti-cavitation device with a replenishment function is provided in the bypass such that when a pressure in the work line is greater than a predetermined pressure, the bypass is closed, and when the pressure in the work line is equal to or less than the predetermined pressure, the bypass is open and the work line or the hydraulic consumer connected to the work line can suck in hydraulic fluid via a supply line. The anti-cavitation device includes an emergency stop function or device to close the line in the bypass or the supply line when a leak is detected in the work line.

Dependencies are inferred from the claim text.