Abstract: A device comprising a main body, an arm assembly comprising first arm member, a first joint, a second arm member, a second joint, orientation control means for adjusting the orientation of the arm members and/or joints of the arm assembly relative to the main body, one or more passive actuating means for counterbalancing at least a part of the weight of the arm assembly, wherein an adjustable lever mechanism is arranged between the main body and the arm assembly, drive means configured for adjusting the lever arm, one or more orientation sensors for determining the orientation of the arm members and/or joints of the arm assembly relative to the main body, and lever arm control means for adjusting the lever arm of the adjustable lever mechanism with the drive means. The invention further relates to a method of adjusting a lever arm of such a device.

Abstract: A device comprising a main body, an arm assembly comprising first arm member, a first joint, a second arm member, a second joint, orientation control means for adjusting the orientation of the arm members and/or joints of the arm assembly relative to the main body, one or more passive actuating means for counterbalancing at least a part of the weight of the arm assembly, wherein an adjustable lever mechanism is arranged between the main body and the arm assembly, drive means configured for adjusting the lever arm, one or more orientation sensors for determining the orientation of the arm members and/or joints of the arm assembly relative to the main body, and lever arm control means for adjusting the lever arm of the adjustable lever mechanism with the drive means. The invention further relates to a method of adjusting a lever arm of such a device.

Abstract: A push frame is provided for interconnecting an undercarriage of a tractor of a work vehicle and a blade of the work vehicle. The push frame comprises a first push-beam, a second push-beam, a first cross-beam, a second cross-beam, and a center joint. The first and second push-beams are spaced apart to be positioned on laterally opposite sides of the undercarriage relative to a fore-aft axis of the push frame. The first and second cross-beams are fixed respectively to the first and second push-beams laterally outwardly relative to the fore-aft axis and are attached to one another laterally inwardly relative to the fore-aft axis by the center joint of the push frame allowing relative movement between the first and second cross-beams. At least one of the first and second cross-beams varies in height.

Abstract: A push frame is provided for interconnecting an undercarriage of a tractor of a work vehicle and a blade of the work vehicle. The push frame comprises a first push-beam, a second push-beam, a first cross-beam, a second cross-beam, and a center joint. The first and second push-beams are spaced apart to be positioned on laterally opposite sides of the undercarriage relative to a fore-aft axis of the push frame. The first and second cross-beams are fixed respectively to the first and second push-beams laterally outwardly relative to the fore-aft axis and are attached to one another laterally inwardly relative to the fore-aft axis by the center joint of the push frame allowing relative movement between the first and second cross-beams. At least one of the first and second cross-beams varies in height.