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" |
국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) | B30B-009/00 |
미국특허분류(USC) | 37/10 ; 37/41 ; 37/42R ; 172/180 |
출원번호 | US-0737522 (1976-11-01) |
발명자 / 주소 | |
출원인 / 주소 | |
인용정보 | 피인용 횟수 : 50 인용 특허 : 0 |
This invention is directed to an apparatus for compacting snow for skiing and snowmobiling. It includes an elongated snow compacting member with means which permit its ends to move upwardly and downwardly so that when one end contacts an elevated snow surface that end automatically moves upwardly to substantially equalize the p.s.i. exerted by the snow compacting member against the snow which is being compacted. It also includes snow compacting wings which extend outwardly from and are pivotally secured to the central snow compacting section of the snow ...
An apparatus for compacting snow for sking comprising, an elongate central section having a substantially flat bottom wall, first elongate frame means substantially parallel to said central section when viewed from the top, means for securing said first elongate frame means to said central section, second elongate frame means substantially parallel to said first elongate frame means and located forwardly thereof, first pivot means located substantially at the centers of said first and second frame means for providing pivotal movement of said first frame ...