This inventor holds 4 USPTO granted patents and 1 EPO patent. Top assignees: Blue Sky Marine, LLC, Davinci Engineering & Consulting, LLC, Kohler Company. Active years: 2014-2017.
Company Filing History:
2 out of 2 
1 out of 1 
1 out of 3,573 
Years Active: 2014-2017
Title: David John Gruenwald: Innovator in Marine Drive Technology
Introduction
David John Gruenwald is a notable inventor based in Menasha, WI (US). He has made significant contributions to marine technology, holding a total of 4 patents. His innovative designs focus on enhancing the performance and efficiency of marine drive systems.
Latest Patents
One of Gruenwald's latest patents is for a hull mounted, steerable marine drive with trim actuation. This system allows for 360-degree steering and trim adjustments, featuring a watertight enclosure that protects the marine drive components from water exposure. The design includes a gasket flange plate that follows the hull's contour, improving hydrodynamic performance. Additionally, the system incorporates a forward-neutral-reverse (FNR) transmission assembly, a trimmable upper unit, and a steerable lower unit, along with trim foils for enhanced lift and trim capabilities.
Another significant patent involves a power management system that includes a wet exhaust system. This invention features a catalytic assembly designed to reduce harmful emissions from an engine. The assembly utilizes a cooling housing that circulates coolant, allowing exhaust gases to flow through a catalyst substrate, converting harmful emissions into less harmful ones. This innovative approach not only improves environmental performance but also enhances the overall efficiency of marine engines.
Career Highlights
Throughout his career, Gruenwald has worked with reputable companies such as Blue Sky Marine, LLC and Kohler Company. His experience in these organizations has contributed to his expertise in marine technology and innovation.
Collaborations
Gruenwald has collaborated with notable individuals in the field, including George Edward Phillips and Douglas J. Yoder. These partnerships have likely fostered a creative environment that encourages the development of groundbreaking technologies.
Conclusion
David John Gruenwald is a distinguished inventor whose work in marine drive technology has led to significant advancements in the industry. His innovative patents reflect a commitment to improving marine performance and environmental sustainability.