$\require{mediawiki-texvc}$
  • 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

Backflow prevention assembly

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F16K-015/03    B21C-037/28   
미국특허분류(USC) 137/015.19; 137/613; 137/512; 137/527; 072/370.04; 072/370.17
출원번호 US-0958839 (2001-10-12)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Fish & Richardson P.C.
인용정보 피인용 횟수 : 4  인용 특허 : 20
초록

A backflow prevention assembly has a unitary housing with a passage therethrough, two threaded regions formed in an inner surface of the unitary housing, and two valve assemblies positioned in the passage to prevent fluid flow in a direction. Each valve assembly has an annular mount having a threaded outer surface that engages one of the threaded regions on the inner surface of the housing. The threads can be formed by placing a die having a thread on an outer surface thereof in contact with an inner surface of the unitary housing, and pressing on the ou...

대표
청구항

1. A backflow prevention assembly, comprising: a unitary housing having a passage therethrough; two threaded regions formed in an inner surface of the unitary housing by reshaping the wall of the unitary housing; and two valve assemblies positioned in the passage to prevent fluid flow in a direction, each valve assembly having an annular mount having a threaded outer surface that engages one of the threaded regions on the inner surface of the housing. 2. A method of forming a backflow prevention assembly, comprising: providing a unitary housing...

이 특허에 인용된 특허 (20)

  1. Horne Timothy P. ; Tripp Dale S.. Backflow preventer assembly. USP2000026021805.
  2. Dixon Robert W. (Concord CA). Backflow preventing valve. USP1980114231387.
  3. Everett Jon A. (Atascadero CA). Backflow prevention and detection system. USP1995065425393.
  4. Engelmann Lester. Backflow prevention assembly. USP2001026192933.
  5. Engelmann Lester. Backflow prevention assembly. USP2001096293013.
  6. Dunmire Charles W. (Fresno CA) Whitelaw Dennis G. (Hoosick Falls NY) Fields Richard D. (Templeton CA). Backflow preventor with adjustable cutflow direction. USP1996045503176.
  7. Luthy Ronald K. (Garden Grove CA). Backflow valve mounting and sealing device. USP1977084039004.
  8. Nimberger Spencer M. ; Ward Robert. Breakaway coupling. USP1999095947142.
  9. Powell Douglas H. (Sacramento CA). Check valve assembly and method for mounting and installing check valves within a housing. USP1996125584315.
  10. Dunmire Charles W. (Fresno CA). Check valve with reduced hold-open pressure. USP1991024989635.
  11. Williams Edward George (Macedon NY) LaBombard Richard George (Henrietta NY). Crown die for thread rolling of applicator rolls. USP1976033942349.
  12. Powell Douglas H. (El Macero CA). Differential loading fluid check valve. USP1991095046525.
  13. Prince Darryll G. (Norman OK). Field convertible sump check valve. USP1981044261383.
  14. Kozak ; III Michael A. (Encinitas CA). Hydraulic swivel connector. USP1987064672998.
  15. Becker Bernard B. (Belmont MA) Bowman John K. (Brighton MA) Randall Cyril A. (Belmont MA). In line back flow preventer. USP1981084284097.
  16. Amado ; Jr. Juan J. (Aptdo. 4241 Panama City PAX). Method of and apparatus for making spiral tubes. USP1982064336702.
  17. Brewer John L. (Clovis CA) McCauley Gary A. (Clovis CA). Multiply configurable backflow preventer. USP1991024991622.
  18. Dunmire Charles W. (Fresno CA). N-shaped backflow preventor. USP1992045107888.
  19. Prince Darryll G. (Norman OK). Swing check valve. USP1981124304255.
  20. McHugh George J. (Broomall PA). Valve and sensor arrangement. USP1995045406979.