Patent ID: 7174710

Claim:
An improvement to a power plant employing an incompressible fluid and a compressible fluid and having non-rotating shaft with radial projections forming four linearly aligned chambers per operational unit, a housing rotatably sealed and mounted on said shaft enclosing said chambers, a ported spool with flow channels fitting within said shaft, a means for imparting rotational energy to said housing by fluid flow from a first outer chamber through an adjacent inner chamber to a second outer chamber and back through a similar path; and a means for pressurizing a compressible fluid in each outer chamber, said power plant also known as a Nelson Flywheel Power Plant, wherein the improvement comprises a piston in each outer chamber of each operational cell, wherein said piston is situated at the interface of compressible and incompressible fluids therein, and wherein said piston slidably adjoins the shaft.