$\require{mediawiki-texvc}$
  • 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

Check valve having variable opening-force threshold

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F16K-015/03   
미국특허분류(USC) 137/527; 251/337
출원번호 US-0886911 (2001-06-20)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Fish & Richardson P.C.
인용정보 피인용 횟수 : 4  인용 특허 : 23
초록

A check valve is provided to maintain fluid flow in a single desired direction through a conduit. The check valve requires a greater fluid pressure to open the check valve to allow fluid to pass in a desired direction than an amount of pressure required to keep the check valve in its open position. This variable opening force performance is provided by providing a closure arm exerting a closure force on a flapper urging the flapper toward its closed position. Contact between the closure arm and the flapper occurs between a follower on the closure arm and...

대표
청구항

A check valve is provided to maintain fluid flow in a single desired direction through a conduit. The check valve requires a greater fluid pressure to open the check valve to allow fluid to pass in a desired direction than an amount of pressure required to keep the check valve in its open position. This variable opening force performance is provided by providing a closure arm exerting a closure force on a flapper urging the flapper toward its closed position. Contact between the closure arm and the flapper occurs between a follower on the closure arm and...

이 특허에 인용된 특허 (23)

  1. Mitchell H. Charles (7525 Oakhill Ave. Wauwatosa WI 53213) Fettes Donald G. (66 Rawlinson Place Regina ; Saskachewan CA). Backflow check valve. USP1977124063570.
  2. Sutherland Ray (Hopwood PA). Backflow preventer and relief valve assembly. USP1976123996962.
  3. Weise Irvin B. (Houston TX) Dane Oscar (Houston TX). Check valve. USP1980024188973.
  4. Martin James F. ; Fleury Leo W. ; Fuchs Gregory. Check valve and backflow preventer. USP1998015709240.
  5. Powell Douglas H. (Sacramento CA). Check valve assembly and method for mounting and installing check valves within a housing. USP1996125584315.
  6. Dunmire Charles W. (Fresno CA). Check valve with reduced hold-open pressure. USP1991024989635.
  7. Retzloff James G. (Lansing MI) Truax Perin E. (Caledonia MI). Check valve with spring loaded clapper assembly. USP1992095146949.
  8. Powell Douglas H. (El Macero CA). Differential loading fluid check valve. USP1991095046525.
  9. Ackroyd Rand H. (Methuen MA). Double check backflow preventer with improved toggle linkage check valve. USP1993085236009.
  10. Schittek Friedrich (Bremen DT). Flap valve. USP1977044019532.
  11. Lin Ping ; Ackroyd Rand. Flapper check valve. USP2000046050293.
  12. Lin Ping ; Ackroyd Rand. Flapper check valve. USP1999015855224.
  13. DiSabatino ; Jr. Roland (Cherry Hill NJ) Matthews Henry W. (Richboro PA) Freeman Mathew L. (Newtown PA). Main steam isolation check valve. USP1976083972504.
  14. Solaroli Alberto (Newcastle CAX). Pressure relief valve. USP1995055411056.
  15. Kuo Ping-Song (No. 82 ; Tung Cheng Street Tainan TWX). Stop-check valve. USP1989124887792.
  16. Greg L. Britt ; Danny S. Meyer ; Timothy D. Price ; Robert V. Funderburk. Swing check backflow preventer. USP2002026343618.
  17. Matthews John,CAX ; Florence Stephen C.,CAX. Swing check valve. USP2001116314993.
  18. Booth Walter (East Hanover NJ) Levin Alan R. (Somerville NJ). Swing check valve and method for repairing same. USP1997095671769.
  19. Ripert Roger L. (Concord CA). Swing check valve construction. USP1981084281680.
  20. Funderburk Robert Vernon ; Price Timothy Duane. Swing-type check valve assembly having an integrated valve seat and valve housing cover. USP1998085794655.
  21. Funderburk Robert Vernon ; Price Timothy Duane. Swing-type check valve assembly retained within a valve housing by abutting engagement with a valve cover and a port of. USP1998015711341.
  22. Scaramucci Domer (3245 S. Hattie Oklahoma City OK 73129). Tilting disc check valve. USP1980104230150.
  23. Banks William (Ballarat North AUX). Valve closing device. USP1986064595032.