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:
Feb. 20, 2018
Filed:
Dec. 10, 2013
Applicant:
Mitsubishi Electric Corporation, Tokyo, JP;
Inventors:
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 29/66 (2006.01); F04D 17/08 (2006.01); F04D 25/02 (2006.01); F04D 29/28 (2006.01); F04D 29/42 (2006.01); F04D 29/38 (2006.01);
U.S. Cl.
CPC ...
F04D 29/663 (2013.01); F04D 17/08 (2013.01); F04D 25/02 (2013.01); F04D 29/281 (2013.01); F04D 29/384 (2013.01); F04D 29/4226 (2013.01); F05D 2240/304 (2013.01);
Abstract
An inner peripheral side of the blade with respect to an apex (P) of the leading edge protruding portion extends forward in the fan rotating direction with respect to the apex (P). A radius (Rq) at a position of an apex (Q) of the trailing edge protruding portion is larger than a radius (Rp) at a position of the apex (P). The radius (Rq) at the position of the apex (Q) is larger than an intermediate radius (Rm) between a radius (Ro) of an outer peripheral edge and a radius (Ri) of an inner peripheral edge.