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
Stats
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Jun 6, 2006
Grant Date -
Mar 11, 2004
app pub date -
Oct 2, 2001
filing date -
Oct 2, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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ROHR INC | 850 LAGOON DRIVE CHULA VISTA CA 91910-2098 |
International Classification(s)

- 2001 Application Filing Year
- F02K Class
- 108 Applications Filed
- 55 Patents Issued To-Date
- 50.93 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Byrne, Stuart | San Diego, CA | 3 | 31 |
# of filed Patents : 3 Total Citations : 31 | |||
Moe, Jeffrey W | Chula Vista, CA | 11 | 247 |
# of filed Patents : 11 Total Citations : 247 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 9 Citation Count
- F02K Class
- 2.13 % this patent is cited more than
- 19 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

Legal Events
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Dec 19, 2022 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Dec 19, 2022 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Nov 16, 2022 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Nov 16, 2022 |
Jul 04, 2022 | FEPP | FEE PAYMENT PROCEDURE | free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
May 03, 2018 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552) year of fee payment: 8 |
Apr 16, 2014 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Nov 16, 2010 | I | Issuance | |
Oct 31, 2010 | FEPP | FEE PAYMENT PROCEDURE | free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Oct 27, 2010 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Apr 17, 2008 | P | Published | |
Oct 05, 2007 | F | Filing | |
Oct 02, 2007 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITA, TAKASHI;REEL/FRAME:020025/0739 Owner name: CANON KABUSHIKI KAISHA, JAPAN Effective Date: Oct 02, 2007 |
Oct 13, 2006 | PD | Priority Date |

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