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-017/36 |
미국특허분류(USC) | 137/38 ; 137/557 ; 251/66 ; 251/12904 |
출원번호 | US-0451751 (1989-12-15) |
발명자 / 주소 | |
인용정보 | 피인용 횟수 : 14 인용 특허 : 4 |
A valve includes a housing having an inlet, an outlet, and a passageway that connects the inlet and the outlet in fluid communication. A valve member on the housing for opens and closes the passageway and an actuator on the housing that is responsive to movement such as may accompany an earthquake causes the valve member to close the passageway automatically in the event of such movement. The actuator may include a spring for driving the valve member from an open position to a closed position, and a trigger mechanism responsive to movement such as may ac...
A valve, comprising: a housing having an inlet, an outlet, and a passageway that connects the inlet and the outlet in fluid communication; means defining a valve member on the housing for opening and closing the passageway; valve member actuation means on the housing responsive to movement such as may accompany an earthquake for causing the valve member to close the passageway automatically in the event of such movement; and means defining a solenoid on the housing for moving the valve member from the closed position to the open position in order to reop...