Patent ID: 9109733
Filing Date: 2015-08-18
Classification: B64C,F02C,F05D,F16L

Abstract:
1. A hydraulic fluid transfer coupling having a stator, a first coaxial rotor rotatable about the stator, and a second coaxial rotor rotatable about the stator, the first rotor being radially inwards of the stator, the second rotor being radially outwards of the stator, at least part of the first rotor axially overlapping with the stator across a first rotary interface, and at least part of the second rotor axially overlapping with the stator across a second rotary interface; wherein the first rotor carries one or more first rotating fluid lines, the second rotor carries one or more second rotating fluid lines, and the stator carries one or more first static fluid lines corresponding to the first rotating fluid lines and one or more second static fluid lines corresponding to the second rotating fluid lines, each pair of a first rotating fluid line and the corresponding first static fluid line being fluidly coupled across the first rotary interface and each pair of a second rotating fluid line and the corresponding second static fluid line being fluidly coupled across the second rotary interface, whereby hydraulic fluid is transferable between each static fluid line and the corresponding rotating fluid line, and wherein the first static fluid lines are grouped at one side of the stator, and the second static fluid lines are grouped at another side of the stator.