Patent ID: 8596057
Filing Date: 2013-12-03
Classification: F04B,F15B

Abstract:
1. A hydraulic system comprising: a variable displacement hydraulic pump having a swashplate rotatable about an axis; a first hydraulic actuator configured to rotate the swashplate a first direction about the axis; a second hydraulic actuator configured to rotate the swashplate a second direction about the axis; the second direction being opposite to the first direction; a first flow control valve configured to provide pressurized fluid to the first actuator and to selectively drain fluid from the first control actuator to a tank, wherein the first flow control valve is selectively actuated by a solenoid; and a second flow control valve configured to provide pressurized fluid to the second actuator and to selectively drain fluid from the second control actuator to the tank, wherein the second flow control valve is selectively actuated by a solenoid such that the variable displacement hydraulic pump may be maintained in a steady-state configuration by directing pressurized fluid through the first flow control valve to the first actuator and moving the second flow control valve to a flow blocking position to substantially hydraulically isolate the second actuator.