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DISPLACER ELEMENT FOR AN AIRCRAFT OVER WING DOOR TO ALLOW COMPRESSION EVEN WITH FROZEN FLUID INSIDE

IP.com Disclosure Number: IPCOM000250587D
Publication Date: 2017-Aug-04
Document File: 1 page(s) / 91K

Publishing Venue

The IP.com Prior Art Database

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Displacer Element for an aircraft: IP.COM

Abstract

DISPLACER ELEMENT FOR AN AIRCRAFT OVER WING DOOR TO ALLOW COMPRESSION EVEN WITH FROZEN FLUID INSIDE

The present idea concerns the mitigation of the influence of frozen water on Door seals in general and in particular on Over Wing Doors (OWD). The solution came around during discussions on how to mitigate water ingress freezing in a pressurized door seal as frozen water can limit door functions. Putting a displacer element inside the seal limits the amount of water that can freeze.

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DISPLACER ELEMENT FOR AN AIRCRAFT OVER WING DOOR TO ALLOW

COMPRESSION EVEN WITH FROZEN FLUID INSIDE

The present idea concerns the mitigation of the influence of frozen water on Door seals in general and in particular on Over Wing Doors (OWD). The solution came around during discussions on how to mitigate water ingress freezing in a pressurized door seal as frozen water can limit door functions. If the OWD is closed via an inward movement of the door, a seal inside the door frame is compressed. If the seal contains water (e.g. due to a leakage or via other water ingress) this leads to the risk that – if the water freezes inside of the seal – the seal cannot be compressed with a reasonable load. If the applied load is too high, a destruction or damage of the seal or even the door frame cannot be excluded. At least, the door operation might be limited It is the intention of the present document to show a simple solution that limits the amount of water that could be frozen inside of the seal. Furthermore, the proposed solution has no risk in terms of opening events in adverse conditions. Putting a displacer element inside the seal limits the amount of water that can freeze. If water is freezing around the displacer element, the displacer element can still collapse with loads applied on the seal. Hence, the displacer provides the volume needed to break ice; it leads to the effect that the seal is compressible again.