Patent ID: 7556015

Claim:
A method of manipulating a fluid by decoupling the respective compression and expansion ratios between a first working chamber and a second working chamber where the first and second working chambers communicate with one another through a common fluid passage, each working chamber of the type provided by at least one rotary device having a stator and a rotor rotatable with respect to the stator about an axis to manipulate the fluid where the rotor and the stator cooperate to provide the working chambers, said method comprising the steps of; rotating the rotor to admit a first quantity of fluid into the first working chamber at an inlet pressure and then altering the volume of the first quantity of fluid within the first working chamber by a first compression or expansion ratio to establish a first fluid pressure that is different than the inlet pressure, delivering the quantity of fluid at the first fluid pressure from the first working chamber to the common fluid passage as the rotor rotates, rotating the rotor to admit a quantity of fluid into the second working chamber from the common fluid passage at a second fluid pressure and then altering the volume of the second quantity of fluid within the second working chamber by a second expansion or compression ratio to establish an outlet fluid pressure that is different than the second fluid pressure, providing controlled and intermittent fluid communication between the common fluid passage and the second working chamber to charge the second working chamber with the quantity of fluid at the second fluid pressure, and storing the fluid delivered from the first working chamber in the fluid reservoir to establish the stored fluid pressure therein varying the first compression or expansion ratio relative to the second expansion or compression ratio simultaneously with said steps of rotating the rotor to achieve on-the-fly changes in a thermodynamic cycle utilizing the fluid.