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:
May. 17, 2022
Filed:
May. 25, 2017
Applicant:
Mitsubishi Electric Corporation, Tokyo, JP;
Inventors:
Katsuyuki Yamamoto, Tokyo, JP;
Seiji Nakashima, Tokyo, JP;
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 29/38 (2006.01); F04D 29/32 (2006.01);
U.S. Cl.
CPC ...
F04D 29/384 (2013.01); F04D 29/325 (2013.01); F04D 29/324 (2013.01); F05B 2240/301 (2013.01); F05D 2240/303 (2013.01); F05D 2240/304 (2013.01);
Abstract
A propeller fan includes a rotary shaft portion that rotates around an axial center and a plurality of blades disposed around an outer circumferential portion of the rotary shaft portion. Each of the plurality of blades has at least one recessed portion that opens at a trailing edge of the blade. The at least one recessed portion has a first side that is close to an inner circumference of the blade. The first side stretches from the trailing edge toward a leading edge of the blade, and is bent toward an outer circumference of the blade.