Airstair system with deployable upper step
US11878814B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2022 |
| Grant date | Jan 23, 2024 |
| Priority date | — |
| Expiry date | Apr 17, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C1/24
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Airstair systems and associated methods are disclosed. In one embodiment, the airstair has a deployable upper step, a primary deployment device and a secondary deployment device. The upper step is movable between a stowed configuration when a door of the aircraft is closed and a deployed configuration when the door is open. The primary deployment device resiliently biases the upper step toward the deployed configuration. The secondary deployment device is movable in coordination with a movement of the door and configured to drive the deployable upper step toward the deployed configuration during opening of the door and during a failure of the primary deployment device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.