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:
Dec. 02, 2003
Filed:
Jan. 09, 2002
Applicant:
Inventor:
Shuichi Otsuka, Miyota-machi, JP;
Assignee:
Minebea Co., Ltd, Nagano, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 2/938 ;
U.S. Cl.
CPC ...
F04D 2/938 ;
Abstract
In an impeller of an axial-flow blower driven by an outer rotor type motor, the impeller is formed in sections so that individual impeller sections F and R can easily be formed by molding with an axial coupling type die, and also which are arranged in series to construct the entire impeller, thereby realizing an impeller structure in which adjacent impeller blades overlap each other. The number of impeller blades of the front section impeller is more than that of the rear section impeller to reduce the noise generated during the rotation of the impeller.