Patent ID: 8418451

Claim:
A piece of working equipment having an element movable via at least one working hydraulic cylinder, wherein at least one energy recovery hydraulic cylinder is provided for the recovery of energy from the movement of the movable element, and the energy recovery hydraulic cylinder is filled with gas at the bottom side and has a hollow piston rod, wherein the energy recovery hydraulic cylinder is made and is connected to a hydraulic system of the piece of working equipment such that the gas volume in the energy recovery hydraulic cylinder compressible via the movement of the piston rod can be changed by the supply of oil to or the conducting of oil from the energy recovery hydraulic cylinder, wherein a separating piston is provided in the hollow piston rod of the energy recovery hydraulic cylinder, is movable along the piston rod and separates a space provided in the hollow piston rod and filled with oil from the bottom side of the energy recovery hydraulic cylinder filled with gas, wherein the space filled with oil advantageously has a connector for the supply with oil so that the position of the separating piston along the piston rod can be set via the filling amount of the space filled with oil, wherein the connector is advantageously provided in a region of the bearing lug of the piston rod, and wherein two or more energy recovery hydraulic cylinders are provided which are oil-hydraulically in operative communication with one another, with an energy recovery hydraulic cylinder being provided whose space filled with oil is connected to the ring side of a further energy recovery hydraulic cylinder.