Patent ID: 8689535

Claim:
A device comprising: a compressor section, the compressor section comprising, a compressor section bore, and one or more inlet ports, the one or more inlet ports adapted to provide fuel to the compressor section bore; a combustion section, the combustion section operatively coupled to the compressor section and the combustion section comprising a combustion chamber and at least one ignition device; a turbine section, the turbine section operatively coupled to the combustion section and the turbine section comprising, a turbine section bore, and one or more exhaust ports, the one or more exhaust ports adapted to release exhaust from the turbine section bore; and a shaft, the shaft comprising one or more grooves disposed thereon and the shaft extending from at least a portion of the compressor section, through the combustion section, and to at least a portion of the turbine section; wherein (i) the shaft is rotatably coupled to the compressor section and the turbine section, (ii) the one or more grooves includes one or more helically-shaped grooves disposed on the shaft along at least a portion of the combustion section and at least a portion of the turbine section.