Dennis R Unruh

Title: Dennis R. Unruh: Innovator in Force Measurement and Hydraulic Systems

Introduction

Dennis R. Unruh is a notable inventor based in Buhler, Kansas, known for his contributions to the field of engineering. He holds 2 patents that showcase his innovative approach to solving practical problems in mechanical systems. His work primarily focuses on force measurement devices and hydraulic systems, which have significant applications in various industries.

Latest Patents

One of his latest patents is a force measuring device designed for a three-bar hitch. This invention provides a practical way to determine the tension force present in a lower link, independent of any bending or other loadings. The link is formed of two bars bent out from each other to an intermediate point, converging to create a diamond-shaped opening. The distance between the intermediate points on the bars is measured by a length measuring device, which translates into the tension force on the link.

Another significant patent by Unruh is the hydraulic stop, an automatic hydraulic cushioning device for cam plate positioning actuators on variable displacement, axial piston pumps. This invention eliminates the noise, vibration, and wear caused by hammering of the positioning actuator on the back plate when the actuator is close to full retraction. A supply of fluid under pressure is channeled to the cam plate positioning actuator, and a valve in the actuator blocks off drainage of the fluid whenever the actuator is near its fully retracted position. This retained fluid acts as a hydraulic stop and cushion, effectively reducing hammering and its associated issues.

Career Highlights

Dennis R. Unruh is currently employed at the Cessna Aircraft Company, where he applies his engineering expertise to develop innovative solutions. His work at Cessna has allowed him to contribute to advancements in aviation technology, enhancing the performance and reliability of aircraft systems.

Collaborations

Unruh has collaborated with fellow inventor Robert J. Martin, sharing insights and expertise to further their innovative projects. Their partnership exemplifies the spirit of teamwork in the field of invention, leading to the development of practical solutions.

Conclusion

Dennis R. Unruh's contributions to the fields of force measurement and hydraulic systems demonstrate his commitment to innovation and engineering excellence. His patents reflect a deep understanding of mechanical principles and a desire to improve existing technologies. Through his work at Cessna and collaborations with other inventors, Unruh continues to