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) | B05B-003/00 |
미국특허분류(USC) | 239/183 ; 239/184 |
출원번호 | US-0879890 (1978-02-21) |
발명자 / 주소 | |
인용정보 | 피인용 횟수 : 8 인용 특허 : 1 |
The self-propelled irrigation apparatus of the invention has a self-propelled trolley means mounted on water-carrying pipe means disposed in an area to be irrigated. Valve means actuated by depressable levers are disposed in spaced-apart relationship along the upper side of the pipe means. Valve-actuating means mounted on wheels within the trolley means more along with the trolley to lower over each valve means to depress the actuating lever and open the valve means. Water flows from the pipe means through the valve actuating means to a receptacle means....
A self-propelled irrigation apparatus comprising in combination: elongate pipe means extending along an area to be irrigated and being connected to a source of pressurized water; a plurality of spaced-apart normally closed valve means disposed along the upper side of said pipe means, each of said valve means having lever means for being depressed to open gate means in said valve means to permit the flow of water through the valve means; self-propelled trolley means for moving along said pipe means; valve-actuating means mounted on said trolley means for ...