Patent ID: 9328747
Filing Date: 2016-05-03
CPC Classification: F15B

Claim Text:
1. A servo actuator system comprising: a dual acting actuator comprising: a fluid pump having a return; a servo assembly fluidly coupled to the fluid pump, return and the first and second ports, the servo assembly having a plurality of metering orifices; and a controller operably coupled to the servo assembly to operate the servo actuator system in a first state and a second state, wherein in the first state the controller controls each of the plurality of metering orifices such that fluid from the pump flows to the return and fluid transfers freely in and out of the ports with an external force applied to the movable member, and wherein in the second state the controller controls each of the plurality of metering orifices such that fluid pressure from the pump causes a load to be applied to the movable member in the actuator body while allowing cross flow of fluid between the first and second ports.