Monolithic acoustically-treated engine nacelle inlet panels

Details Monolithic acoustically-treated engine nacelle inlet panels Monolithic acoustically-treated engine nacelle inlet panels

2006-12-08

2010-06-15

Donels, Jeffrey (Department: 2832)

Acoustics

Sound-modifying means

Sound absorbing fence or screen

C181S213000, C181S214000, C181S292000, C244S131000, C244S132000

Reexamination Certificate

active

07735600

ABSTRACT:
An acoustic, noise-attenuating panel for an aircraft engine nacelle inlet. The panel includes at least three layers: (a) a perforated film; (b) a sound attenuating core; and (c) a structural layer. The structural layer has through-holes adapted for receiving fasteners that are configured to engage structure of an engine nacelle. The structural layer is fabricated, at least at its ends, of a material sufficiently strong so that when fasteners are engaged in the through-holes in the layer's ends, the fasteners retain the acoustic panel in a nacelle inlet under conditions of use. Alternatively, or in addition, the structural layer ends may be reinforced at the through-holes with reinforcing strips.

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International Search Report and Written Opinion dated May 28, 2008 in International Application PCT/US2007/086789.

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