Method and system for transferring hydraulic power between a pump and an actuator

Abstract

In a method and a system for transmitting hydraulic power between a pump and an actuator, the actuator has an inlet and an outlet for hydraulic fluid, and in between and external to the actuator an actuator circuit, in which hydraulic fluid is circulated from the outlet to the inlet. A pulse pump generates pressure pulses at the desired frequency and hydraulic power is transmitted to the actuator with the help of pressure pulses by converting the pressure pulses into a flow going to the inlet. The return flows from the actuator are returned during the period between the pressure pulses to be used in the pressure pulse following each return flow, whereby an amount of hydraulic fluid corresponding to the volume of the pressure pulses moves across the cross-sectional flow area back and forth in the power transmission pipe or hose between the pulse pump and the actuator.

Dependencies are inferred from the claim text.