Patent ID: 11953030
Assignee: STILL GMBH
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 0:
1. A hydraulic system for an industrial truck comprising:
a lift drive to raise and lower a load handling device, wherein the lift drive comprises a lifting cylinder;
the hydraulic system further comprising:
a first hydraulic pump which is configured to supply the lift drive with hydraulic fluid, and
a second hydraulic pump which can be switched on by a valve device to supply the lift drive with additional hydraulic fluid,
a first delivery channel connected with the first hydraulic pump;
a second delivery channel to connect the second hydraulic pump with the first delivery channel;
wherein the first hydraulic pump and the second hydraulic pump are configured as a hydraulic double pump unit and the valve device is integrated into the hydraulic double pump unit;
a multi-way valve block connected to the hydraulic double pump unit and with which a lifting operation and a lowering operation of the lift drive is controlled; and
a connecting line that connects the first delivery channel to the multi-way valve block.