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:
Sep. 03, 2019
Filed:
Jan. 16, 2015
Mitsubishi Electric Corporation, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A fan according to the present invention includes: a main plate fixed to a rotation axis of a driving device; a shroud including an air inlet; and an impeller including n blades between the main plate and the shroud, tip ends of leading edges of the respective blades arranged along a circle around the rotation axis, wherein all of the attachment pitch angles α are different angles, and the blades are arranged so that, in the attachment pitch angles α, attachment pitch angles on both sides of an attachment pitch angle αare a combination of other than an attachment pitch angle α, which is the next smallest angle in order of magnitude of angle to the attachment pitch angle α, and an attachment pitch angle α, which is the next largest angle in order of magnitude of angle, to the attachment pitch angle α.