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:
Jul. 17, 2018
Filed:
Sep. 12, 2014
Daikin Industries, Ltd., Osaka-shi, Osaka, JP;
Ryuusuke Ohtaguro, Settsu, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
In a centrifugal fan, when an angle defined by a tangential line to a camber line at an intersection point between the camber line and an arc around a rotation axis, and a tangential line to the arc at the intersection point on a blade cross section passing a front edge and a rear edge of a blade is a blade angle, the blade has at least one of a decreasing shape and a fixed shape. The decreasing shape is such that the blade angle decreases as the intersection point is shifted toward the rear edge on the camber line on a front edge side portion of a shroud side blade cross section. The fixed shape is such that the blade angle is fixed, even if the intersection point is shifted toward the rear edge on the camber line on the front edge side portion of the shroud-side blade cross section.