Patent ID: 7140178

Claim:
A hydraulic arrangement comprising: a hydraulic cylinder having a first chamber and a second chamber, a first supply line connected to the first chamber and a second supply line connected to the second chamber; a hydraulic accumulator connected to the first chamber by a hydraulic line, the hydraulic line including a control valve; a hydraulic fluid feeder being in fluid communication with a hydraulic reservoir and conveying a hydraulic fluid; a controller having a lifting position, a lowering position, a neutral position, and a spring support position to control the hydraulic cylinder, the second supply line being fluidly connected to the hydraulic reservoir when the controller is in the spring support position, the hydraulic accumulator being configured to selectively urge the hydraulic fluid towards the first chamber when the controller is in the spring support position, and the first and second supply lines being substantially prevented from being connected to the hydraulic fluid feeder when the controller is in the spring support position.