Patent ID: 11905153
Assignee: JUNGHEINRICH AKTIENGESELLSCHAFT
Field: Handling (Mechanical engineering)
Classification: CPC B  F | IPC B

Claim 6:
7. The method according to claim 6, wherein the hydraulic system comprises a first hydraulic return line that runs between the at least one free lift cylinder and a reservoir for the hydraulic fluid, wherein the hydraulic system further comprises a separate second hydraulic return line that runs between the at least one mast lift cylinder and the reservoir, wherein a first lowering valve is integrated in the first return line, wherein a second lowering valve is integrated in the second return line, and wherein the method further comprises opening the first lowering valve and the second lowering valve simultaneously via the control for the hydraulic system at the start of the load lowering operation when the load receiving means are let down and the mast lift stage and the free lift stage simultaneously start retracting.