Patent ID: 9021798
Filing Date: 2015-05-05
Classification: F15B

Abstract:
1. A pressurized medium system, comprising: at least one actuator or actuator unit configured to generate sum forces effective on a load; at least two working chambers operating by the principle of displacement and located in said actuator or actuator unit, the at least two working chambers including at least two predetermined working chambers; at least one charging circuit of a higher pressure, which is a source of hydraulic power capable of both producing and receiving a volume flow at a first predetermined pressure level; at least one charging circuit of a lower pressure, which is a source of hydraulic power capable of both producing and receiving a volume flow at a second predetermined pressure level; and a control circuit configured to couple at least one of said charging circuits of higher pressure and at least one of said charging circuits of lower pressure in turn to each predetermined working chamber, wherein the control circuit comprises, for each predetermined working chamber, a first controllable control interface configured to open and close a first connection to said charging circuit of higher pressure, and a second controllable control interface, separate from the first controllable control interface, configured to open and close a second connection to said charging circuit of lower pressure, the first controllable control interface and the second controllable control interface each comprise an on/off controlled shut-off valve or several on/off controlled shut-off valves connected in parallel, each predetermined working chamber is capable of generating force components that correspond to the first predetermined pressure level and the second predetermined pressure level of the at least one charging circuit of higher pressure and the at least one charging circuit of lower pressure, respectively, to be coupled to each respective predetermined working chamber, and at least one of the sum forces is produced by the force components generated by the at least two predetermined working chambers.