Lockheed Martin has been granted a patent for a rotor blade assembly designed to connect to a rotor hub, allowing for precise control of pitch angle. The assembly includes a torsional pitch member, torque tube, blade, and pitch control member, enhancing rotor performance. GlobalData’s report on Lockheed Martin 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 Lockheed Martin, Hydrogen fuel cells was a key innovation area identified from patents. Lockheed Martin's grant share as of January 2024 was 68%. Grant share is based on the ratio of number of grants to total number of patents.

Rotor blade assembly with torsional pitch control mechanism

Source: United States Patent and Trademark Office (USPTO). Credit: Lockheed Martin Corp

A recently granted patent (Publication Number: US11884387B2) discloses a rotor assembly designed to be connected to a rotor hub for rotation around a central axis. The assembly includes a blade with a torsional pitch member, a torque tube, and a blade spar, along with a pitch control member to adjust the blade's pitch angle. The unique design features curvilinear channels within the torsional pitch member, allowing for precise control and manipulation of the blade's orientation. Additionally, the patent covers a co-axial rotary wing aircraft incorporating this rotor assembly, with multiple rotor hubs, torsional pitch members, and pitch control mechanisms to control the pitch angles of the blades independently.

Furthermore, the patent details a method for controlling the co-axial rotary wing aircraft, involving the pitch control member adjusting the pitch input to the pitch horn connected to the rotor assembly. By applying torsional forces to the torque tube and torsional pitch member, the pitch angle of the blade can be controlled, with the torsional pitch member experiencing twists along its longitudinal axis. This method allows for precise and efficient control of the aircraft's rotor system, ensuring optimal performance and stability during operation. The patent's innovative design and control mechanisms offer a significant advancement in the field of rotary wing aircraft technology, promising enhanced maneuverability and operational capabilities for future aircraft models.

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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.