公开(公告)号：US3594098A

公开(公告)日：1971-07-20

申请号：US3594098D

申请日：1969-09-15

Applicant: FRAM CORP

Inventor： PRATINIDHI SHRINIVAS V

IPC: F04D29/38

CPC classification number: F04D29/382

Abstract: An automotive fan having flexible curved blades of resilient material which decamber as rotational speed increases in which an integral portion of each blade, having a mass of the order of 2 percent to 40 percent, preferably 8 percent to 10 percent, of the remainder of the blade, extends continuously along substantially the entire trailing edge of the blade and is folded upon itself at the trailing edge on the upstream side of the blade, thereby rigidifying and weighting the trailing edge to reduce vibration and noise and to assist the decambering of said blade at a predetermined rate.

公开(公告)号：US3639079A

公开(公告)日：1972-02-01

申请号：US3639079D

申请日：1970-03-12

Applicant: FRAM CORP

Inventor： PRATINIDHI SHRINIVAS V

IPC: F04D29/38 ,  F04D29/36

CPC classification number: F04D29/382

Abstract: A fan having a hub, a plurality of arms extending radially outwardly of the hub, blade structures, one secured to each arm, each comprising resilient trailing portions which decamber as rotational speed increases, and a reinforcing cap secured to each arm and blade which has a decamber-limiting portion extending partially coextensively with the trailing blade portion at an acute angle thereto, and two integrally formed upstanding lips, one disposed along each opposed radially spaced edge of the cap and of the decamber-limiting portion thereof which reduce metal fatigue in the cap.

Abstract translation: 具有毂的风扇，沿着轮毂径向向外延伸的多个臂，叶片结构，一个固定到每个臂的结构，每个臂包括作为转速增加的弹性尾部，并且固定到每个臂和叶片上的加强盖， 与所述后叶片部分以锐角部分地共同延伸的十进制限制部分，以及两个整体形成的直立唇缘，沿着所述盖子的每个相对的径向间隔开的边缘设置，并且其十进制限位部分减少金属疲劳 这顶帽子。