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:
Aug. 08, 2017
Filed:
Apr. 09, 2013
Sharp Kabushiki Kaisha, Osaka-shi, Osaka, JP;
Yui Kumon, Osaka, JP;
Masaki Ohtsuka, Osaka, JP;
Sharp Kabushiki Kaisha, Sakai, JP;
Abstract
A propeller fan includes a boss hub portion and a blade including a front edge portion, a rear edge portion, and an outer edge portion. The outer edge portion has a front outer edge portion, a rear outer edge portion, and a connection portion connecting the front outer edge portion and the rear outer edge portion to each other. In a plan view of the blade along a central axis, a maximum radius R1of the outer edge portion in a portion corresponding to the front outer edge portion and a maximum radius R2of the outer edge portion in a portion corresponding to the rear outer edge portion satisfy a condition of R1>R2. With such a construction, a propeller fan which generates wind less in pressure fluctuation and is capable of sending comfortable wind and achieving lowering in noise is provided.