Patent ID: 7302797

Claim:
A hydraulic system, comprising: a reservoir configured to hold a supply of fluid; a source configured to pressurize the fluid; a fluid actuator; a first valve configured to selectively fluidly communicate the source with the fluid actuator to facilitate movement of the fluid actuator in a first direction; a second valve configured to selectively fluidly communicate the fluid actuator with the reservoir to facilitate movement of the fluid actuator in the first direction; a third valve configured to selectively fluidly communicate the fluid actuator with the reservoir to facilitate movement of the fluid actuator in a second direction; a shuttle valve disposed between the second and third valves and movable between a first position where pressurized fluid from the second valve is passed through the shuttle valve, to a second position where pressurized fluid from the third valve is passed through the shuttle valve; and a proportional pressure compensating valve configured to control a pressure of the fluid directed between the fluid actuator and the reservoir.