Patent 11535392 was granted and assigned to Pratt & Whitney Canada on December, 2022 by the United States Patent and Trademark Office.
A hybrid propulsion system includes a heat engine configured to drive a heat engine shaft. An electric motor is configured to drive an electric motor shaft. A transmission system includes at least one gearbox. The transmission system is configured to receive rotational input power from each of the heat engine shaft and the electric motor shaft and to convert the rotation input power to output power.