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 |
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국제특허분류(IPC7판) | B60B-033/00 |
미국특허분류(USC) | 188/112 ; 16/35R ; 188/31 ; 188/69 |
출원번호 | US-0833578 (1986-02-26) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 24 인용 특허 : 6 |
A caster is provided which makes use of a wheel that has discrete notches and that is rotatably mounted to a housing, a locking pin that is movably mounted to the housing to engage (or to disengage from) any one of the notches, and an actuator for use by a user in moving the locking pin into engagement (or disengagement). The housing also has a distinct notch into which the locking pin moves when it engages any of the wheel notches, so that locking force is borne by the housing rather than by the actuator. The notches are preferably defined in an interna...
A positive locking caster for supporting an object on a surface comprising: a housing having a distinct notch formed therein; a wheel rotatively mounted to said housing and adapted to roll on the surface, said wheel having a surface defining a plurality of discrete notches, each of said discrete notches being rotatable to a position next to said distinct notch; a locking pin movably mounted on said housing, said pin being movable into said distinct notch and one of said discrete notches for locking engagement, said locking pin also being movable out of s...