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) | B64C-003/48 B64C-009/32 |
미국특허분류(USC) | 244/219 ; 244/113 ; 244/218 |
출원번호 | US-0914673 (1978-06-09) |
발명자 / 주소 | |
인용정보 | 피인용 횟수 : 8 인용 특허 : 1 |
The present variable airfoil assembly has an adjustable airfoil member pivotally mounted in the top of a fixed airfoil member for adjustment between a fully lowered position (for minimum wind resistance) and different raised positions in which it projects up above the top surface of the fixed airfoil member to control the lift and drag. A minimum clearance between the fixed and adjustable airfoil members is provided at the front end of the adjustable airfoil member over a range of its pivotal adjustments. The variable airfoil assembly is capable of incre...
In a variable airfoil assembly having: a fixed airfoil member with a bottom wall, a convex nose extending upward and curving rearward from the front end of said bottom wall to a top wall segment which terminates in a transverse edge at the front of a recess in the top of the fixed airfoil member above said bottom wall; and an adjustable airfoil member in said recess pivotally mounted away from its front end for adjustment between a fully lowered position fitting in said recess and raised positions in which its front end extends up from the top of said fi...