The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 2011
Filed:
Oct. 31, 2007
Taku Iwase, Ibaraki, JP;
Masanori Watabe, Ibaraki, JP;
Osamu Sekiguchi, Tokyo, JP;
Tetsuya Hioki, Tokyo, JP;
Taro Tanno, Tokyo, JP;
Motoi Jin, Tokyo, JP;
Yoshihiko Kato, Tokyo, JP;
Taku Iwase, Ibaraki, JP;
Masanori Watabe, Ibaraki, JP;
Osamu Sekiguchi, Tokyo, JP;
Tetsuya Hioki, Tokyo, JP;
Taro Tanno, Tokyo, JP;
Motoi Jin, Tokyo, JP;
Yoshihiko Kato, Tokyo, JP;
Nidec Servo Co., Ltd., Gumma, JP;
Abstract
In an axial flow fan, a line extending from a center axis and passing a corner where a following edge and a radially outer edge of a blade of an impeller meet is arranged forwardly in a rotational direction from an another corner where a leading edge of the blade and a radially outer surface of a hub meet. Furthermore, a camber ratio of the blade, which is minimum at a joint with the hub across the blade, monotonically increases to be maximum at the radially outer edge of the blade.