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" |
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) | F16K-015/04 |
미국특허분류(USC) | 137/54319 ; 137/539 ; 251/337 |
출원번호 | US-0905242 (1986-09-08) |
발명자 / 주소 | |
출원인 / 주소 | |
인용정보 | 피인용 횟수 : 21 인용 특허 : 1 |
A ball check valve is provided having a ball retainer which is particularly inexpensive to manufacture and yet which is capable of allowing high amounts of flow without clogging or plugging. The retainer member is formed with three stamped pieces of sheet material which are generally u-shaped and have included an angle such that the sum of the angles is 360°. In the preferred embodiment three such retainer components are used and the retaining member is held in place between two housing members which are threadably attached to one another. The ball and s...
A ball check valve having a linear flow axis and comprising: a first housing member; a second housing member releasably attached to said first housing member; a ball having a diameter; a seat in said first housing member for releasably receiving said ball; a spring having a diameter; a ball retainer in said first housing, said retainer comprising: a first inside diameter somewhat greater than said ball diameter for releasably receiving said ball; a second inside diameter less than said ball diameter and greater than said spring diameter, said retainer be...