Assembly and method for fan noise reduction from turbofan engines using dynamically adaptive Herschel-Quincke tubes

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7055648
APP PUB NO 20040045767A1
SERIAL NO

10343567

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An assembly useful in reducing aircraft engine noise such as turbofan engine noise (730) comprises: (i) at least one tube 'H-Q' having an inlet end (738), an outlet end (740) and a central tube portion therebetween; and (ii) at least one actuator operatively interconnected to at least one tube, wherein the actuator is capable of causing dynamic response by the tube. The assembly of this invention may be used in a method for reducing noise, the method comprising: (a) providing means for generating non-uniform noise energy about an inner surface and within a disclosure having at least an inlet; (b) providing an assembly for reducing noise comprising; (i) at least one having an inlet end, an outlet end and a central tube portion therebetween, and (ii) at least one actuator operatively interconnected to at least one tube, wherein the actuator is capable of causing dynamic response by the tube; and (c) directing at least a portion of the non-uniform noise into the assembly.

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Patent Owner(s)

Patent OwnerAddress
ROHR INC850 LAGOON DRIVE CHULA VISTA CA 91910-2098

International Classification(s)

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  • 2001 Application Filing Year
  • F02K Class
  • 108 Applications Filed
  • 55 Patents Issued To-Date
  • 50.93 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances20012002200320042005200620072008200920102011201220132014201520160255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Byrne, Stuart San Diego, CA 3 31
Moe, Jeffrey W Chula Vista, CA 11 247

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Patent Citation Ranking

  • 9 Citation Count
  • F02K Class
  • 2.13 % this patent is cited more than
  • 19 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges2602533101 - 1011 - 2021 - 3031 - 4041 - 5005101520253035404550556065

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