Electric heating – Heating devices – With heater-unit housing – casing – or support means
Reexamination Certificate
2011-04-12
2011-04-12
Evans, Geoffrey S (Department: 3742)
Electric heating
Heating devices
With heater-unit housing, casing, or support means
C219S529000, C244S00100R, C244S05300R
Reexamination Certificate
active
07923668
ABSTRACT:
An engine nacelle inlet lip includes both acoustic treatment and electric heating for ice protection. The inlet lip has a composite outer skin and a composite inner skin, with the composite outer skin having at least one integrated heater element embedded in the composite material. An acoustic cellular core positioned between the outer and inner skin acts to attenuate fan noise from the engine. Covering the outer skin and overlying the acoustic core is a perforated erosion shield having a first set of openings that pass entirely thorough its thickness. The composite outer skin includes a second set of openings such that sound waves can pass from an inner barrel portion of the inlet lip through the erosion shield, outer skin, and heater element to the underlying acoustic cellular core.
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Brown Keith Towers
Christy Daniel P.
Hubert Claude Marc
Layland Michael John
Evans Geoffrey S
Patel Vinod D
Rohr Inc.
Womble Carlyle Sandridge & Rice PLLC
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