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For the Inventor, By the Inventor

Oshkosh, WI, United States of America

Roger E Koepsel

USPTO Granted Patents = 21

Average Co-Inventor Count = 2.7

ph-index = 10

Forward Citations = 207(Granted Patents)


Company Filing History:

goldMedal21 out of 2,534 
 
Brunswick Corporation
 patents

Years Active: 1982-2025

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21 patents (USPTO):Explore Patents
1. 12391353 - Marine drives and methods of making marine drives so as to minimize deleterious effects of cavitation (2025-08-19),
2. 11981411 - Marine drives and methods of making marine drives so as to minimize deleterious effects of cavitation (2024-05-14),
3. 11713102 - Marine drives and methods of making marine drives so as to minimize deleterious effects of cavitation (2023-08-01),
4. 11459074 - Marine drives and methods of making marine drives so as to minimize deleterious effects of cavitation (2022-10-04),
5. 9745948 - Marine propeller and method of design thereof (2017-08-29),
6. 7637722 - Marine propeller (2009-12-29),
7. 7086836 - Dual rate torque transmitting device for a marine propeller (2006-08-08),
8. 6340290 - Controllable pitch propeller with a fail safe increased pitch movement (2002-01-22),
9. 6068529 - Marine propulsion unit with dual water inlet structure (2000-05-30),
10. 5902160 - Twin propeller marine propulsion unit (1999-05-11),
11. 5791950 - Twin propeller marine propulsion unit (1998-08-11),
12. 5290147 - Variable pitch marine propeller with shift biasing and synchronizing (1994-03-01),
13. 5236310 - Marine propeller with performance pitch, including five blade version (1993-08-17),
14. 5219272 - Variable pitch marine propeller with hydrodynamic shifting (1993-06-15),
15. 5104292 - Marine propeller with performance pitch, including five blade version (1992-04-14),

Title: The Innovative Contributions of Roger E Koepsel in Marine Drive Technology

Introduction

Roger E Koepsel, based in Oshkosh, Wisconsin, is a distinguished inventor known for his significant contributions to marine technology. With a portfolio that boasts 20 patents, Koepsel has made waves in the industry, particularly with his innovative designs aimed at enhancing marine propulsion systems.

Latest Patents

Among his latest patents is an ingenious method for making marine drives that minimize the deleterious effects of cavitation. This method includes key steps such as providing a gearcase and installing a propeller shaft assembly that extends forwardly from the gearcase. The design couples both front and rear propellers to the propeller shaft assembly, which allows for optimal propulsion of marine vessels. A notable feature of this invention is the formation of a wide trailing end portion on the gearcase, which helps maintain pressure alongside, significantly reducing cavitation effects. Additionally, the configuration of the front and rear propellers ensures that the front propeller absorbs a greater torque/thrust load, enhancing overall efficiency during operation.

Career Highlights

Koepsel’s innovative journey is closely tied to his role at Brunswick Corporation, a leader in the marine industry. His expertise in designing and optimizing marine drives has not only contributed to the company's success but has also positioned him as a key figure in maritime engineering.

Collaborations

Throughout his career, Koepsel has worked alongside esteemed colleagues such as Ronald M Steiner and Michael A Karls. These collaborations have fostered an environment of creativity and shared knowledge, leading to remarkable advancements in marine drive technology.

Conclusion

Roger E Koepsel's impact on marine technology through his inventive solutions exemplifies the spirit of innovation. His patents not only reflect his deep understanding of engineering principles but also his commitment to pushing boundaries within the field. As the marine industry continues to evolve, inventions like Koepsel's will remain pivotal in shaping the future of marine propulsion systems.

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