US 11,999,494 B2
Multi-stage evacuation systems and methods for aircraft
Angela Noelani Cruz, Seattle, WA (US); Mark Edward King, Rigby, ID (US); and Steven Philip McDonald, Marysville, WA (US)
Assigned to The Boeing Company, Chicago, IL (US)
Filed by THE BOEING COMPANY, Chicago, IL (US)
Filed on Jul. 25, 2022, as Appl. No. 17/872,094.
Claims priority of provisional application 63/271,250, filed on Oct. 25, 2021.
Prior Publication US 2023/0131280 A1, Apr. 27, 2023
Int. Cl. B64D 25/14 (2006.01); B64C 1/14 (2006.01); B64D 25/18 (2006.01)
CPC B64D 25/18 (2013.01) [B64C 1/1407 (2013.01); B64D 25/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An emergency evacuation system configured to be stored in a compartment below an exit door of a vehicle, the emergency evacuation system comprising:
a first floatation device including an internal inflator; and
a second floatation device including an open inflation system, wherein the second floatation device is coupled to the first floatation device,
wherein, during deployment, the internal inflator is configured to inflate the first floatation device to deploy the emergency evacuation system outside of the compartment, and wherein the first floatation device in an inflated state is configured to dispose the open inflation system above water.