Abstract: The invention relates to a damping system, in particular in the form of a hydraulic cabin spring system, having at least one hydraulically triggerable actuating part (20) and having at least one hydraulic accumulator (26) which is connected to the assignable actuating part (20). In that, by means of a proportional throttle valve (10), proportional damping for the respective actuating part (20) is achieved, variable proportional damping which can react to events in a manner specific to the user can be implemented.

Abstract: A piston accumulator can be used for hydraulically actuating the discharge unit in non-automotive bulk commodity vehicles. The accumulator cylinder has a tappet which can be axially displaced within the cylinder. When a defined load pressure is reached in the oil chamber of the cylinder, the tappet can be displaced by a piston to actuate a control valve. The valve serves as shut-off device for the loading fluid stream flowing to the oil chamber and is positioned as a detachable module on the exterior face of cylinder cover in such a way that it can be actuated by the outer end of the tappet. The tappet is guided towards the outside by passing in a sealed manner through the cylinder cover.

Abstract: An energy recovery device, in particular of static and kinetic energy, has at least one hydraulically controlled working cylinder (110) or a hydraulic engine (210) that moves tools back and forth, preferably up and down. The working cylinder (110) or the hydraulic engine (210) can be connected to a hydraulic circuit (132) with a pump (134) and to a hydraulic accumulator (138) by a connection line (136). The connection line (136) contains two hydraulically controlled check valves (140, 142) controlled by a control unit, in particular a distributing valve (144), depending on the displacement of the tools or on the state of motion of the working unit. This energy recovery device does not have the disadvantages due to the use of conventional cartridge valves, and is cheap and reliable to operate.