hydraulics for wind power transfer

I would like some help with this idea. Some folks are trying to design a new concept in using wind power. It goes like this and any advise or criticism is helpful. Instead of coupling a wind turbine to a generator directly you would use the turbine to turn a hydraulic pump then move the fluid through a rotary coupling that allowed the horizontal movement of the turbine to follow the wind. The fluid would be piped to the ground where the hydraulic power would be transfered from a hydraulic motor to an induction generator driven directly and tied directly to the grid. The turbine needs to spin at about 500 to 800 rpm and the generator at 1800 rpm. Does this sound feasable using off the shelf hydraulics? Bob Hazard