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:
Oct. 22, 2013
Filed:
Aug. 10, 2010
Kevin Yen, Nagano, JP;
Hiromitsu Kuribayashi, Nagano, JP;
Kevin Yen, Nagano, JP;
Hiromitsu Kuribayashi, Nagano, JP;
Sanyo Denki Co., Ltd., Tokyo, JP;
Abstract
A curved portion is formed at a corner portion between a shroud and a positive pressure surface of each of a plurality of blades. The curved portion has a curvature that decreases from a suction port or the vicinity of the suction port toward a corresponding one of discharge ports. The curved portion includes a curved surface that is concave in a direction of rotation of the fan and forms a part of the positive pressure surface. The curved portion raised inwardly into an airflow path so that a shortest distance between the outer peripheral portion of a hub and a portion of the curved surface in the vicinity of the shroud may gradually decrease toward the corresponding one of the discharge ports.