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:
Sep. 17, 2013
Filed:
Nov. 03, 2011
Gen Terao, Kodaira, JP;
Gen Terao, Kodaira, JP;
Balmuda Inc., Tokyo, JP;
Abstract
An axial flow fan including a rotation shaft section to be mounted on the rotation shaft of rotation drive means, an inner blade group provided outside the rotation shaft section so as to be coaxial therewith, and an outer blade group provided outside the inner blade group so as to be coaxial therewith, wherein the inner blade group is formed of a plurality of inner blades provided radially around the rotation shaft section, the outer blade group is formed of a plurality of outer blades provided radially around the rotation shaft section, and the velocity Vof the wind generated by the inner blade group and the velocity Vof the wind generated by the outer blade group have a relationship of 1.5V<Vby designing the blades of the inner blade group and the outer blade group with respect to number, area, angle and shape.