John K Harvell

Title: Innovations of John K Harvell

Introduction

John K Harvell is a notable inventor based in Phoenix, AZ, who has made significant contributions to the field of gas turbine engines. With a total of 2 patents, his work focuses on enhancing the efficiency and reliability of engine starting systems.

Latest Patents

Harvell's latest patents include a "Method and apparatus for controlling the inlet duct leading to an auxiliary power unit" and a "Start circuit for electric starting of engines." The first patent describes a closed-loop control system for the inlet duct of a gas turbine engine mounted in an aircraft. This system varies the flow area of the inlet duct by opening and closing a duct door, ensuring that the engine can start in flight without issues related to pressure differentials. The second patent outlines a start circuit controlled by an electronic control unit, which provides power from a battery and TRU to a starter motor. This innovative method initiates the engine start with battery power, subsequently adding TRU power to reduce inrush current, thereby enhancing the reliability of the start circuit components.

Career Highlights

Harvell is currently employed at AlliedSignal Inc., where he continues to develop and refine technologies related to gas turbine engines. His expertise in this area has positioned him as a valuable asset to his company and the industry.

Collaborations

Throughout his career, Harvell has collaborated with notable colleagues, including Joseph W Michalski, Jr and Craig A Freeman. These partnerships have contributed to the advancement of his innovative projects.

Conclusion

John K Harvell's contributions to the field of gas turbine engines through his patents demonstrate his commitment to innovation and engineering excellence. His work not only enhances the functionality of aircraft engines but also sets a standard for future developments in the industry.