Leonardo has been granted a patent for a fan design featuring multiple conveying elements and Coanda surfaces to efficiently direct primary and secondary air flows. The fan includes specific configurations for optimal air flow control and ejection, enhancing overall performance. GlobalData’s report on Leonardo gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Leonardo, Light-weight composite fuselage was a key innovation area identified from patents. Leonardo's grant share as of January 2024 was 55%. Grant share is based on the ratio of number of grants to total number of patents.

Fan with coanda surfaces for primary and secondary air flow

Source: United States Patent and Trademark Office (USPTO). Credit: Leonardo SpA

A recently granted patent (Publication Number: US11885353B2) discloses a fan design comprising a first annular conveying element connected to a source of primary air flow, with a first mouth directing a portion of the air flow onto a Coanda surface. The fan also includes a second annular conveying element with at least one mouth receiving another portion of the air flow and a pair of radial ducts connected to a nozzle for ejecting the air flow. The design aims to efficiently control the flow of air and reduce vorticity, enhancing the fan's performance. Additionally, the patent describes various configurations and applications of the fan in air, marine, or land vehicles, highlighting its versatility and potential impact on different transportation systems.

Furthermore, the patent details the integration of the fan into vehicles such as helicopters, convertiplanes, or gyrodyne, emphasizing the potential benefits for aerodynamic efficiency and air circulation within the vehicle. The fan's ability to draw in secondary air flow from a separate environment and direct the primary and secondary air flows towards distinct environments showcases its adaptability for various transportation settings. Moreover, the patent discusses different sources of pressurized air for the fan, including additional fans, fluid lines connected to engine systems, or air/water separators in cooling systems, underscoring the diverse applications and configurations possible with this innovative fan design. Overall, the patent highlights the technical advancements and potential practical implications of this fan technology in enhancing airflow control and efficiency in different vehicle types.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.