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. 30, 2021
Filed:
Aug. 09, 2017
Mitsubishi Electric Corporation, Tokyo, JP;
Katsuyuki Yamamoto, Tokyo, JP;
Takuya Teramoto, Tokyo, JP;
Takahide Tadokoro, Tokyo, JP;
Hiroya Ito, Tokyo, JP;
Yuki Ugajin, Tokyo, JP;
Shingo Hamada, Tokyo, JP;
Takashi Ikeda, Tokyo, JP;
Takafumi Abe, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A propeller fan includes a cylindrical shaft portion provided on a rotation axis of the propeller fan; a plurality of blades provided on an outer peripheral side of the shaft portion; a connection portion provided adjacent to the shaft portion and connecting two of the plurality of blades that are adjacent to each other in a circumferential direction of the propeller fan; a first rib provided on at least one of a pressure surface of each of the plurality of blades and a surface of part of the connection portion that is located on a downstream side in the flow of air, and a second rib provided on at least one of a negative-pressure surface of each of the plurality of blades and a surface of part of the connection portion that is located on an upstream side in the flow of air.