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) | B62D-061/02 |
미국특허분류(USC) | 180/221 ; 180/220 ; 180/205 ; 180/298 ; 180/342 |
출원번호 | US-0523193 (1995-09-05) |
발명자 / 주소 | |
출원인 / 주소 | |
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 18 인용 특허 : 15 |
A power assist apparatus which includes a battery powered motor which is mounted on a manually operated vehicle such as a bicycle, which is to be selectively usable by the rider of the bicycle to not only assist in the manual operation of the bicycle but can be used as a sole source of operation of the bicycle. The power assist apparatus is normally fixedly mounted on the bicycle and is carried with that bicycle at all times. The power assist apparatus includes a housing and exteriorly mounted on that housing is a handle. Movement of the handle to variou...
[ What is claimed is:] [1.] A power assist apparatus for a manually operated vehicle, said manually operated vehicle having a support wheel adapted to engage with a surface on which said manually operated vehicle is to be operated, said power assist apparatus including a drive wheel designed to operationally engage with said support wheel, said drive wheel being operatively driven by a motor assembly, said motor assembly being contained within a housing, the improvement comprising:a main supporting frame mounted within said housing, said motor assembly a...