Hydraulic system for an industrial truck
AssigneeSTILL GmbH
InventorMarkus Schwab
Life of this patent
Estimating the term…
Abstract
A hydraulic system (1) for an industrial truck, in particular an electrically operated, battery-powered industrial truck, includes a lift drive (2) to raise and lower a load handling device. The hydraulic system (1) has a first hydraulic pump (5) which is configured to supply the lift drive (2) with hydraulic fluid, and a second hydraulic pump (6) which can be switched on by means of a valve device (7) for the supply of the lift drive (2). The first hydraulic pump (5) and the second hydraulic pump (6) are configured as a hydraulic double pump unit (1) and the valve device (7) is integrated into the hydraulic double pump unit (10).
Claims18
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.
Dependencies are inferred from the claim text.