$\require{mediawiki-texvc}$
  • 검색어에 아래의 연산자를 사용하시면 더 정확한 검색결과를 얻을 수 있습니다.
  • 검색연산자
검색연산자 기능 검색시 예
() 우선순위가 가장 높은 연산자 예1) (나노 (기계 | machine))
공백 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 예1) (나노 기계)
예2) 나노 장영실
| 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 예1) (줄기세포 | 면역)
예2) 줄기세포 | 장영실
! NOT 이후에 있는 검색어가 포함된 문서는 제외 예1) (황금 !백금)
예2) !image
* 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 예) semi*
"" 따옴표 내의 구문과 완전히 일치하는 문서만 검색 예) "Transform and Quantization"

특허 상세정보

Noise reduction in aircraft propellers

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-011/48   
미국특허분류(USC) 416/129 ; 416/201A ; 416/237 ; 416/238
출원번호 US-0566203 (1990-08-13)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 24  인용 특허 : 0
초록

The invention concerns reduction of tip vortices in aircraft propellers, wherein a fence having anhedral or dihedral is attached to the blades of the propeller. Another form of the invention is applicable to counterrotating propeller systems, wherein a fence is attached to the blades of the forward propeller of the system, and no fences are attached to the aft propeller.

대표
청구항

An aircraft propeller system, comprising: a) forward and aft counterrotating propellers, each including a plurality of blades having curved leading edges, wherein said forward propeller blade leading edges are approximately mirror images of said aft propeller blade leading edges, except in the tip regions; b) a tip region on each of said forward propeller blades which has cahedral.

이 특허를 인용한 특허 피인용횟수: 24

  1. Nolan, Robert. Air-ground vehicle with integrated fuel tank frame. USP2017069682620.
  2. Vlastuin, Jonathan. Aircraft turbopropeller. USP2018039926081.
  3. Patt, Dan; Karem, Abe. Anhedral tip blades for tiltrotor aircraft. USP2011118066219.
  4. Vion, Laurence; Delattre, Gregory; Jacquin, Laurent; Rodriguez, Benoit; Boisard, Ronan; Ortun, Biel; Falissard, Fabrice. Blade for a fan of a turbomachine, notably of the unducted fan type, corresponding fan and corresponding turbomachine. USP2017049630704.
  5. Nolan, Robert. Ground vehicle with flight capability. USP2017059656526.
  6. Topol, David A.; Morin, Bruce L.; Korte, Detlef. Low noise compressor and turbine for geared turbofan engine. USP2017089733266.
  7. Topol, David A.; Morin, Bruce L.; Korte, Detlef. Low noise compressor and turbine for geared turbofan engine. USP2017059650965.
  8. Topol, David A.; Morin, Bruce L.. Low noise compressor rotor for geared turbofan engine. USP2017089726019.
  9. Topol, David A.; Morin, Bruce L.. Low noise compressor rotor for geared turbofan engine. USP2014058714913.
  10. Topol, David A.; Morin, Bruce L.. Low noise compressor rotor for geared turbofan engine. USP2017049624834.
  11. Topol, David A.; Morin, Bruce L.. Low noise compressor rotor for geared turbofan engine. USP2014098834099.
  12. Morin, Bruce L.; Korte, Detlef. Low noise turbine for geared turbofan engine. USP2013088517668.
  13. Merville, Didier; Galons, Lucie; Perrot, Vincent; Reiss, Hanna. One-block bladed disk provided with blades with adapted foot profile. USP2017069677404.
  14. Zipszer, Gábor. Propeller blade. USP201811D834491.
  15. Vlastuin, Jonathan Evert; Dejeu, Clement Marcel Maurice. Propeller blade for a turbomachine. USP20180710035582.
  16. Hedlund,Benny; Jonsson,Kare. Propeller combination for a boat propeller drive having double propellers. USP2008087407366.
  17. Towkan, Michael Fedor. Propellers for aircraft. USP2016129527578.
  18. Dejeu, Clement Marcel Maurice; Pascal, Sebastien; Talbotec, Jerome; Leborgne, Michael; Lepot, Ingrid Irene Catherine. Propulsion device having unducted counter-rotating and coaxial rotors. USP2017039593582.
  19. Gratzer, Louis B.. Split blended winglet. USP20190410252793.
  20. Gratzer, Louis B.. Split blended winglet. USP20181010106247.
  21. Lebrun, Maxime. Turbomachine having an unducted fan provided with air guide means. USP2012078221081.
  22. Breeze-Stringfellow, Andrew; Khalid, Syed Arif; Smith, Jr., Leroy Harrington. Unducted thrust producing system. USP20190210202865.
  23. Beckman, Brian C.. Vehicle noise control and communication. USP20180710013900.
  24. Siplinger James D.. Vortex reducing mower blade. USP2001106301868.