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특허 상세정보

Sound attenuator for low frequencies, in particular for air ducts in paper mills

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) E04F-017/04   
미국특허분류(USC) 181/224 ; 181/243
출원번호 US-0820160 (1992-01-13)
우선권정보 FI-0000258 (1991-01-17)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 22  인용 특허 : 0
초록

The inventions concerns a sound attenuator for low frequencies for air-conditioning ducts, in particular for intake-air and/or exhaust-air ducts in paper mills. The sound attenuator comprises a frame whose flow duct substantially coincides with the air-conditioning duct and in which frame there is at least one plane attenuator member parallel to the flow direction and comprising one or several attenuator units operating by the Helmholtz and/or plate resonator principle. The attenuator member or members are fitted in the frame singly or as a group of seve...

대표
청구항

A sound attenuator for low frequencies for air-conditioning ducts, comprising a frame, said frame having a flow duct arranged such that it can substantially coincide with an air-conditioning duct, said frame further comprising at least one attenuator member having a top and bottom edge, and a planar face arranged such that it will be parallel to the flow direction of air when arranged in the air-conditioning duct, said at least one attenuator member comprising one or several attenuator units structured to operate by the Helmholtz and/or plate resonator p...

이 특허를 인용한 특허 피인용횟수: 22

  1. Lee, Peng. Acoustic attenuator. USP2003126668970.
  2. Moffat, George H.; Stubbs, Gene Woodard; Voll, William Albert. Acoustic muffler for turbine engine. USP2004026695094.
  3. Dausch, Uwe. Air-diffusion panel for a motor vehicle. USP2004116814182.
  4. Nguyen, Phuong H.; Sikora, Joseph A.; Campbell, Thomas A.. Automatic control systems for aircraft auxiliary power units, and associated methods. USP2011118061650.
  5. Nguyen, Phuong H.; Sikora, Joseph A.; Campbell, Thomas A.. Automatic control systems for aircraft auxiliary power units, and associated methods. USP2011027891605.
  6. Nguyen,Phuong H.; Sikora,Joseph A.; Campbell,Thomas A.. Automatic control systems for aircraft auxiliary power units, and associated methods. USP2008047364116.
  7. Campbell, Thomas A.; Chambers, David S.; Willie, Robert H.; Rust, Charles W.. Dual flow APU inlet and associated systems and methods. USP2009117611093.
  8. Campbell,Thomas A.; Chambers,David S.; Willie,Robert H.; Rust,Charles W.. Dual flow APU inlet and associated systems and methods. USP2008037344107.
  9. Blichmann John R. (Lafayette IN) Johnson Brian S. (New York NY). Engine enclosure air inlet/discharge sound attenuator. USP1997045625172.
  10. Disimile, Peter. Fluid flow noise mitigation structure and method. USP2015109169750.
  11. Chen, Hsin-Chang. Foldable sound attenuator. USP2015099121174.
  12. Bayliss, Andrew J.; Paterson, John T.; Retz, Kevin. Independent power generation in aircraft. USP2015028950703.
  13. Bayliss, Andrew J.; Paterson, John T.; Retz, Kevin. Independent power generation in aircraft. USP2014028657227.
  14. Campbell,Thomas A.; Voll,William A.; Diamond,John A.. Integrated axially varying engine muffler, and associated methods and systems. USP2007097267297.
  15. Heeb, Gerald. Muffler including a resonator slide-in unit. USP2015069057313.
  16. Radatus,Herms; Shahkavoosi,Ramin. Noise attenuator with laterally moving baffles. USP2007087258196.
  17. Tracy, Mark S.; Tang, Punan; Chowdhury, Mohammed I.; Price, Herman A.. Noise reduction with resonatance chamber. USP2009067546898.
  18. Jangili, Ranjit Kumar; Loud, Richard; Venugopal Setty, Dinesh. Sound attenuation systems and methods. USP2012088240427.
  19. Helenius, Kalle; Pettersson, Henrik. Sound attenuator for low frequencies, method for manufacturing sound attenuator for low frequencies and system for attenuating low frequencies for example in air-conditioning ducts of paper mills. USP2012098272475.
  20. Zielinski, Edward; Bernier, Alan T.; Knechtel, Kent W.; Campbell, Thomas A.; White, Jeffrey J.; Ralston, Mark D.. Systems and methods for starting aircraft engines. USP2009047513119.
  21. Lwasa, Ronald M.; Chow, Allen D.. Thermally compliant APU exhaust duct arrangements and associated systems and methods. USP2010087765784.
  22. Karimi, Kamiar J.; Liu, Shengyi; Liffring, Mark E.; Helton, Steven B.; Fu, Sheau-Wei (Johnny). Vehicle electrical power management and distribution. USP2014058738268.