Patent ID: 9481221
Filing Date: 2016-11-01
CPC Classification: B60G,F16F

Claim Text:
1. A hydraulic actuator comprising: a pressure tube defining a fluid chamber; a piston slidably disposed within said pressure tube, said piston dividing said fluid chamber into an upper working chamber and a lower working chamber; said upper working chamber having an upper flow port and said lower working chamber having a lower flow port; a control system disposed outside of said fluid chamber generating damping forces for said hydraulic actuator, said control system being in direct fluid communication with said upper and lower working chambers; and said control system including a flow controller, a first adaptive valve in direct fluid communication with said upper flow port of said upper working chamber, and a second adaptive valve in direct fluid communication with said lower flow port of said lower working chamber, said first and second adaptive valves configured to enable a range of flows and pressure drops for different flow rates, to thus enable an active damping force to be generated by said control system; and said flow controller in fluid communication with a motor/pump, said upper working chamber and said lower working chamber, and further being in direct flow communication with said upper and lower working chambers.