Patent ID: 7621255

Claim:
A machine for extracting energy from an expanding gas comprising: a) a power ring operatively configured to channeling air through an input port into a chamber defined in part by the power ring having a plurality of power teeth where the forward motion of a first power tooth creates an expanding chamber defined in part by the trailing surface of the first power tooth and a portion of a cylindrical surface of a first piston valve, b) a second power tooth positioned rotationally rearwardly from the first power tooth on the power ring with respect to the rotation of the power ring where the second power tooth is configured to pass through a slotted region of the first piston valve where a forward surface of the second power tooth compresses said air through a compression port positioned at a first radial location on the power ring, the compression port being in communication with an inlet port of a combustion chamber where the air is compressed therein, c) a valve mechanism configured to cut communication between the inlet port and the compression ports, d) the second power tooth operatively configured to pass a slot region of a second piston valve, and having the air combust with a combustible fuel and provide ignition thereof, e) an outlet port in communication with the combustion chamber at a second radial location which is a different radial location than the first radial location of the inlet port and the outlet port communicates with an expansion port trailing the second power tooth and the expansion port is positioned at the second radial location, f) a third power tooth positioned rotationally rearwardly from the second power tooth on the power ring with respect to the rotation of the power ring where the third power tooth is operatively configured to pass the slot region of the second piston valve where a forward surface of the third tooth positively displaces the combustion mixture forward out of an outlet port, g) whereas the expanding gas to provide a force upon the trailing surface of the second power tooth to provide a torque about the power ring and wherein engagement of the outer surface of the second piston valve and an inner surface of the power ring is a tighter fit during a portion of the communication between the expansion port of the power ring and the outlet port in communication with the combustion chamber to ensure a tighter seal.