Patent ID: 8033107

Claim:
A hydrostatic drive comprising: a first hydraulic pump; a second hydraulic pump; and a dual-acting hydraulic cylinder comprising a working piston, which defines a first working chamber comprising a first piston surface of the working piston and a second working chamber comprising a second piston surface of the working piston, the first and the second hydraulic pumps being connected by their respective first connections to the first working chamber, the first hydraulic pump being connected by its second connection to a hydraulic fluid reservoir and the second hydraulic pump being connected by its second connection to the second working chamber, wherein the hydraulic pumps are driven via a common drive shaft by a drive machine and the hydraulic pumps are configured to deliver hydraulic fluid in a first delivery direction and in a reverse delivery direction, wherein the drive comprises: a feed pump connected via the drive shaft to the drive machine for volumetric flow equalisation when the delivery direction of the first and second hydraulic pumps is reversed; and a feed pressure line protected by a feed pressure control valve for limiting the maximum available feed pressure of the feed pump, and wherein the drive comprises a tapping valve, an outlet connection of the tapping valve being connected to the feed pressure line for removing hydraulic fluid in the first delivery direction of the hydraulic pumps.