Actually there is a group of investors who have been waiting for two events.
1---The Patent---marketable intellectual property
2---A functional Prototype-that can demonstrate efficiency.
1 is done
2 has been built but will require a few mods to work properly. Mostly that is a pressure relief port for the low pressure containment vessel, the drum that encloses all the working components and prevents any leakage.
It doesn't have to be a car, just a simple cart that you push in one direction to charge the accumulator, then release and let the pressure drive it in the opposite direction so the difference in the distance travelled will show the amount of return energy applied. We are looking for 85% in a low speed demonstration. Anything above that is gravy.
Now that you've finally gotten yours approved... http://www.scientificamerican.com/bl...yie-2009-12-10 Patent applications for so-called green technologies will be put on the approval fast track thanks to a new pilot program announced Monday by the U.S. Commerce Department's Patent and Trademark Office (USPTO).