Patent ID: 7430953
Filing Date: 2008-10-07
Classification: B66F,F15B

Abstract:
1. A loading implement with hydraulic arrangement for lifting and lowering a boom, the hydraulic arrangement comprising: at least one hydraulic conveying device; a hydraulic fluid tank; a hydraulic cylinder with a lifting side hydraulic supply line and a lowering side hydraulic supply line; a control implement connected to the lifting and lowering lines for the control of the hydraulic cylinder; a first hydraulic line connecting the hydraulic cylinder on the lowering side with the hydraulic fluid tank and equipped with a first selector valve; a second hydraulic line connecting the hydraulic cylinder on the lifting side with the hydraulic fluid tank or with the lowering side supply line and equipped with a second selector valve; a lifting side load holding valve arrangement and a control unit for the switching of the selector valves; a sensor adapted to signal at least one position of the boom or the hydraulic cylinder; activation devices for shifting into a floating condition for the hydraulic cylinder; and controllable control devices for the lowering of the boom, wherein the control unit is configured in such a way that the lowering of the boom and/or the shifting into the floating condition takes place as a function of the signal delivered by the sensor.