In the maritime and boating sectors, equipment durability in shallow waters is a persistent engineering challenge. A recent development addressing this issue is outlined in US Patent 12703468, titled “Beaching propeller”. This patent was filed and secured by Raider Outboards, Inc., a company recognized for producing specialized marine propulsion systems. The invention was conceptualized and designed by inventors Michael Woodruff, David Woodruff, and Christopher Woodruff. The patent details a propeller system that includes a propeller hub, multiple connected blades, and a unique tubular insert featuring an inner and outer face. This insert, equipped with a raised ridge on its inner face, is strategically positioned within at least a portion of the propeller hub.
The core innovation of this beaching propeller lies in its structural resilience and specialized hub assembly. Operating marine vessels in shallow waters or intentionally beaching them frequently subjects standard propellers to severe impacts and abrasive forces. The patented tubular insert with its raised ridge acts as a reinforced internal support structure. This design effectively absorbs and distributes the mechanical stress generated when the propeller encounters sand, mud, or submerged obstacles. By protecting the core integrity of the hub and the blade attachments, the invention extends the operational lifespan of the motor and reduces the frequency of critical mechanical failures in demanding aquatic environments.
September 2026 Patent of the Month
For the month of September 2026, the Beaching propeller was awarded the patent of the month for the maritime boating industry. This recognition was granted because the design successfully resolves a persistent vulnerability in both commercial and military amphibious operations. As coastal exploration and shallow water navigation have expanded, the marine industry has prioritized reliability under extreme conditions. The implementation of the raised ridge insert provides a scalable and practical solution that drastically decreases maintenance costs and equipment downtime, making it a highly impactful advancement for marine propulsion technology.
Eligibility for US R&D Tax Credits
Applying the technology detailed in this patent presents significant opportunities for companies to qualify for the United States Research and Development tax credit. Under Section 41 of the Internal Revenue Code, businesses can claim credits for qualified research activities that involve a process of experimentation to eliminate technical uncertainty. In the context of the beaching propeller, marine manufacturers could claim the credit by developing and testing new composite materials for the tubular insert to maximize its shock resistance. Furthermore, engineering teams conducting hydrodynamic simulations and physical field trials to optimize the geometry of the raised ridge for varying water conditions would be engaging in eligible experimental processes. These systematic efforts to improve the performance, durability, and manufacturability of the propeller system directly align with the core requirements of the R&D tax credit program.
