Company Filing History:
4 out of 2,542 
1 out of 832,891 Years Active: 1980-1990
Title: The Innovative Contributions of Francis E Bertram
Introduction
Francis E Bertram is a notable inventor based in Malone, Wisconsin, who has made significant contributions to the field of marine engineering. With a total of five patents to his name, Bertram has developed innovative solutions that enhance the performance and efficiency of marine engines.
Latest Patents
One of Bertram's latest patents is the "Marine engine exhaust system with diverter valve and alternate exhaust." This invention provides an internal combustion engine with an exhaust discharge system that merges exhaust paths from individual cylinders into an exhaust cavity. The diverter valve selectively prevents the merger of exhaust from individual cylinders at low speeds, allowing for optimal exhaust tuning. At high speeds, the valve closes to merge the exhaust, improving overall engine performance and power.
Another significant patent is the "Marine stern drive with through-housings lubrication system." This invention features a marine stern drive unit that includes a propeller-carrying drive shaft housing, a bell housing, and a gimbal housing. The dual control valve system ensures that lubricant is retained in the separate housing assemblies when disassembled for servicing, enhancing the maintenance process and ensuring the longevity of the marine drive system.
Career Highlights
Throughout his career, Bertram has worked with reputable companies, including Brunswick Corporation. His experience in the marine industry has allowed him to develop practical solutions that address common challenges faced by marine engineers and boat manufacturers.
Collaborations
Bertram has collaborated with notable individuals in the field, including Gary L Meisenburg and Jack L Golz. These collaborations have contributed to the development of his innovative patents and have helped advance marine engineering practices.
Conclusion
Francis E Bertram's contributions to marine engineering through his patents demonstrate his commitment to innovation and improvement in the industry. His work continues to influence the design and functionality of marine engines, showcasing the importance of inventive thinking in engineering.