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US 11,679,820 B2Granted
Spring-damper system
AssigneeHydac Mobilhydraulik GmbH
InventorAlexander Streit
Life of this patent
Estimating the term…
Abstract
A spring-damper system includes at least a differential cylinder (4), a hydraulic accumulator (26) and a control valve device (1, 2). By at least one motor-pump unit (22), pressure fluid can be supplied to the annular end (6) or both the annular end (6) and the piston end (8) of the differential cylinder (4) in a closed circuit using the control valve device (1, 2).
Claims12
A spring-damper system, comprising:
- a differential cylinder having an annular end and a piston end;
- a control valve device having first and second control valves, the first and second control valves being proportional throttle valves, each of the proportional throttle valves being open in a non-throttling open position;
- a first pump operated by a motor and capable of supplying pressure fluid to the annular end or both the annular end and the piston end of the differential cylinder in a closed circuit using the control valve device, the first control valve being connected in fluid communication at an inlet of the first control valve to the annular end and at an outlet of the first control valve to the piston end and to an inlet of the second control valve, an outlet of the second control valve being connected in fluid communication to an inlet of the first pump;
- and
- a hydraulic accumulator connected in fluid communication to the closed circuit;
- whereby the spring-damper system controls suppling energy to the annular end and/or the piston end of the differential cylinder.
3 more elements
A spring-damper system, comprising:
- a differential cylinder having an annular end and a piston end;
- a control valve device;
- a first pump operated by a motor and capable of supplying pressure fluid to the annular end or both the annular end and the piston end of the differential cylinder in a closed circuit using the control valve device, the first pump including a gear pump with a leakage oil port connected to a return line;
- and
- a hydraulic accumulator connected in fluid communication to the closed circuit.
2 more elements
Dependencies are inferred from the claim text.