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) | B60B-033/04 |
미국특허분류(USC) | 16/19 ; 16/32 ; 280/4317 ; 280/4320 |
출원번호 | US-0352449 (1989-05-16) |
발명자 / 주소 | |
인용정보 | 피인용 횟수 : 13 인용 특허 : 0 |
An improved adjustable wheel structure mainly adapted for use in a trailing vehicle on which a yacht, boat or motorcycle can be mounted for transportation; the present wheel structure is provided with a special nut member having its inner surface half threaded and half smoothed, and the nut member is able to be adjusted forward or backward so that the threaded inner surface thereof can be selectively engaged with a vertically disposed adjusting screw rod which has a smaller diameter than the central through hole of the slidable nut member so that the whe...
An improved adjustable wheel structure adapted for use in a trailing vehicle comprising: an outer tube having a number of facets disposed at the top end thereof with a hand operated shaft being horizontally guided through the faceted portion, and a first bevel gear means being mounted to the shaft and located within said outer tube; an inner tube disposed within said outer tube and having a closed top end which is provided with a hole so that a screw rod can be located therethrough; on the top portion of said inner tube being provided with a peripheral r...