Bombardier has been granted a patent for airstair systems with deployable upper steps for aircraft doors. The method involves using primary and secondary deployment devices to ensure the upper step moves into position when the door opens, even in case of primary device failure. GlobalData’s report on Bombardier 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 Bombardier, Aircraft environment control system was a key innovation area identified from patents. Bombardier's grant share as of January 2024 was 50%. Grant share is based on the ratio of number of grants to total number of patents.

Airstair system with deployable upper step for aircraft

Source: United States Patent and Trademark Office (USPTO). Credit: Bombardier Inc

A recently granted patent (Publication Number: US11878814B2) discloses a method for actuating a deployable upper step of an airstair on an aircraft. The method involves using a primary deployment device to bias the step towards a deployed configuration when the aircraft door is opened. In case of a failure of the primary device, a secondary deployment device, comprising a command lever pivotally coupled to the aircraft fuselage, is utilized to drive the step into the deployed position. The secondary device includes engaging members that allow for coordinated movement with the door and resiliently biased components to ensure proper functioning.

Furthermore, the patent claims detail additional features such as resiliently biasing the step towards deployment regardless of the door movement, pivotability of the step about a different axis from the door, and the use of the secondary device to stow the step when the door is closed. The deployable upper step is also pivotally coupled to the aircraft fuselage, and the secondary device is employed to pull the step into the deployed configuration. These claims highlight the innovative approach taken to ensure the safe and efficient deployment of the upper step of an aircraft airstair, enhancing passenger boarding and disembarkation processes while maintaining operational reliability.

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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.