Edward Horton Fletcher

Title: Edward Horton Fletcher: Innovator in Fluid Power Systems

Introduction

Edward Horton Fletcher is a notable inventor based in Waterloo, IA (US). He has made significant contributions to the field of fluid power systems, holding a total of 3 patents. His work focuses on enhancing control systems for hydraulic applications, showcasing his expertise and innovative spirit.

Latest Patents

Fletcher's latest patents include the "Electrohydraulic Valve System" and the "Total Power Fluid System." The Electrohydraulic Valve System is designed to control a double-acting cylinder using four pilot-operated, proportional-type poppet valves. This system effectively manages fluid flow between the cylinder, a pump, and a reservoir. It features solenoid-controlled pilot valves that operate the poppet valves based on error signals from a control circuit, which receives feedback on cylinder position and operator commands. The system also allows for float, shutdown, variable deadband, and pressure adjustment operations.

The Total Power Fluid System is another innovative creation for engine-powered vehicles. This system incorporates an engine-driven, variable displacement pump, along with a pair of variable displacement wheel motors and auxiliary functions. Transducers within the system monitor engine speed, pump output pressure, and motor speeds. These transducers supply signals to the pump and motor controls, which process the information alongside operator input to optimize engine power usage and enhance vehicle performance.

Career Highlights

Edward Fletcher is currently employed at Deere & Company, where he continues to develop and refine his innovative ideas in fluid power technology. His work at this esteemed company has allowed him to contribute to advancements in hydraulic systems that are crucial for various applications.

Collaborations

Fletcher has collaborated with notable colleagues, including Gordon K. Wiegardt and Kenneth D. Kramer. Their combined expertise has fostered an environment of innovation and creativity, leading to the development of cutting-edge technologies in their field.

Conclusion

Edward Horton Fletcher's contributions to fluid power systems exemplify his dedication to innovation and engineering excellence. His patents reflect a deep understanding of hydraulic control systems, making him a significant figure in the industry.