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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0219390 (1988-07-15) |
우선권정보 | JP-0075109 (1986-05-19); JP-0075110 (1986-05-19) |
발명자 / 주소 |
|
출원인 / 주소 |
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인용정보 | 피인용 횟수 : 5 인용 특허 : 0 |
Each blade of a high speed propeller fan extended radially outwardly from a member connected to a rotating body has a coarsened surface at least part of its suction side. The coarsened surface has a coarsened density or depth which gradually increases from the rear edge of the blade to its front edg
In a high speed propeller fan which includes a member connected to a rotating body and a plurality of blades extending radially outwardly from the outer peripheral surface of said member, each of said blades characterized by having a coarsened surface defined by a plurality of grooves on at least pa
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