Hans P Stehle

Title: Innovations by Hans P Stehle

Introduction

Hans P Stehle is a notable inventor based in Waiblingen, Germany. He has made significant contributions to the field of engineering, particularly in the development of innovative manufacturing methods and components for machinery. With a total of 5 patents to his name, Stehle's work has had a considerable impact on the industry.

Latest Patents

One of his latest patents is a method of manufacturing a guide for driven chains. This method involves applying a wear-resistant hard metal alloy as a running surface to the slideway of the guide. The process includes producing a bar-shaped blank with a dentritic structure from the alloy, utilizing a suction casting process. The blank undergoes hot isostatic pressing at high pressure and temperature, followed by an annealing process that alters the structure of the alloy, enhancing its wear resistance. The bars are then shaped to fit onto the slideway and are fixedly connected.

Another significant invention by Stehle is a composite crankshaft for a two-stroke engine, designed for portable handheld work tools such as chain saws and cutoff machines. This crankshaft features a crank pin connected to a crank web by a press fit, with an innovative design that reduces stress peaks. The radial spacing of the press-fit surface changes in relation to the axial spacing, following an exponential function. This design ensures that stress fields produced by the press fit are uniform, thereby reducing the load on the crankshaft.

Career Highlights

Throughout his career, Hans P Stehle has worked with various companies, including Andreas Stihl, where he has contributed to the development of advanced engineering solutions. His expertise in manufacturing processes and component design has made him a valuable asset in the industry.

Collaborations

Stehle has collaborated with notable professionals in his field, including Wilfried Noll and Norbert Apfel. These collaborations have further enriched his work and contributed to the success of his inventions.

Conclusion

Hans P Stehle's innovative contributions to engineering, particularly in the manufacturing of guides for driven chains and composite crankshafts, showcase his expertise and dedication to advancing technology. His patents reflect a commitment to improving the performance and durability of machinery components.