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. 06, 2022
Filed:
Aug. 09, 2017
Mitsubishi Electric Corporation, Tokyo, JP;
Takuya Teramoto, Tokyo, JP;
Takahide Tadokoro, Tokyo, JP;
Katsuyuki Yamamoto, 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 shaft portion disposed on a rotation axis, and a blade disposed on an outer peripheral side of the shaft portion and including a leading edge and a trailing edge. The blade includes a negative pressure surface in which a plurality of recesses are formed, and the plurality of recesses include a first recess and a second recess disposed on the trailing edge side than the first recess in a circumferential direction about the rotation axis as a center. The first recess has a depth larger than a depth of the second recess.