Patent ID: 9587652
Date: 2017-03-07
CPC Classifications: E02F,F04B,F04D,F15B,F16H

Claim:
1. A hydrostatic drive, comprising: a closed circuit including a variable-displacement pump with a swept volume configured to be adjusted by an adjustment device, the variable-displacement pump being configured to be connected via two working lines to a motor; and an adjustment pressure supply configured to supply the adjustment device with adjustment pressure medium, the adjustment pressure supply having a pressure cut-off valve by which the maximum adjustment pressure is configured to be set as a function of a high pressure in one of the working lines, whereby the swept volume of the variable-displacement pump is configured to be reduced, wherein the pressure cut-off valve is pilot-controlled and has a high-pressure port connected to at least one of the working lines, an adjustment pressure port, and a leakage port, wherein a pressure cut-off valve body of the pressure cut-off valve is loaded via the high-pressure port in a direction for opening a connection from the adjustment pressure port to the leakage port, wherein a spring loads the pressure cut-off valve body in a closing direction, wherein the pressure cut-off valve has a control pressure port via which the pressure cut-off valve body is configured to be loaded in an opening direction or in a closing direction, and wherein the control pressure port is configured to be charged with control pressure medium via a pressure regulating valve.