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:
Nov. 29, 2022
Filed:
May. 28, 2018
Daikin Industries, Ltd., Osaka, JP;
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Abstract
Blades (to) of a propeller fan () have different circumferential pitches φ, and φ. The blades (to) have different masses so that the center of gravity of the propeller fan () is positioned on a rotational center axis () of the propeller fan (). Blade body portions () of the blades (to) have different thicknesses. In contrast, camber lines of the blades (to) in blade cross section have the same shape, projections of the blades (to) on a plane perpendicular to the rotational center axis () of the propeller fan () have the same shape, and leading edge portions (to) of the blades (to) have the same shape. As a result, a propeller fan () having reduced noise and vibrations can be achieved.