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. 19, 2008
Filed:
Jun. 29, 2004
Applicants:
Michinori Watanabe, Nagano, JP;
Toshiki Ogawara, Nagano, JP;
Haruhisa Maruyama, Nagano, JP;
Inventors:
Assignee:
Sanyo Denki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 29/54 (2006.01);
U.S. Cl.
CPC ...
Abstract
An axial-flow fan unit that produces less noise is provided. Bladesare exposed from a venturi. The shape of each of the bladesis so defined that a space formed between at least an inner surfaceof each of web leg sectionsA toC and an edgeof each of the bladeslocated in the radially outward direction of the bladesexpands toward the ends of the web leg sectionsA toC (or web bodiesA toC). With this arrangement, noise produced when the bladesrotate along the web leg sectionsA toC is reduced.