Acoustic mechanical retainer

Details Acoustic mechanical retainer Acoustic mechanical retainer

2007-11-20

2007-11-20

Martin, Edgardo San (Department: 2837)

Acoustics

Sound-modifying means

Sound absorbing fence or screen

C181S214000, C244S00100R, C244S131000, C244S132000

Reexamination Certificate

active

11112946

ABSTRACT:
A fan case assembly includes a noise attenuation layer that is covered by a face sheet. The face sheet includes a first plurality of openings. The noise attenuation layer includes a plurality of individual cells that are in communication with at least one of the first plurality of openings. Noise energy is communicated through the first plurality of openings into the individual cells and dissipated to reduce noise emissions. A seam in the face sheet is covered to protect the underlying noise attenuation layer from damage by a retainer. The retainer is bonded to the face sheet over the seam and includes a second plurality of holes that communicates noise energy through the retainer to the noise attenuation layer. Communication of noise energy through the retainer provides an acoustically active seam that aids in the dissipation of noise energy and thereby reduces the level of sound emitted from the engine.

REFERENCES:
patent: 3821999 (1974-07-01), Guess et al.
patent: 4161231 (1979-07-01), Wilkinson
patent: 4293053 (1981-10-01), Shuttleworth et al.
patent: 5000399 (1991-03-01), Readnour et al.
patent: 5297760 (1994-03-01), Hart-Smith
patent: 5581054 (1996-12-01), Anderson et al.
patent: 6328261 (2001-12-01), Wollaston et al.
patent: 6761245 (2004-07-01), Porte
patent: 6772857 (2004-08-01), Porte et al.
patent: 6820337 (2004-11-01), Buge et al.
patent: 6892526 (2005-05-01), Stretton et al.
patent: 6923931 (2005-08-01), Dublineau et al.
patent: 2002/0078569 (2002-06-01), Buge et al.
patent: 2004/0045766 (2004-03-01), Porte et al.
patent: 2005/0081992 (2005-04-01), Buge et al.
patent: 0 572 725 (1993-12-01), None
patent: 1 167 185 (2002-01-01), None
patent: 1 621 752 (2006-02-01), None
patent: 1 715 158 (2006-10-01), None
Extended European Search Report dated Dec. 28, 2006.

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